FCC ID: 2AJYU-8BAE006 LTE/HSPA/GSM/GNSS Module

A7608SA-H_User Manual_V1.00 Smart Machine Smart Decision Document Title A7608SA-H_User Manual Version Date Status 1.00 2022-08-26 Released Document Control ID A7608SA-H_User Manual_V1.00 RF Exposure Statement:

For the product,under normal use condition is at least 20cm away from the b ody o f the user,the user must keeping at least 20cm distance to the product. Note that the module was assessed for use with cables of less than 3m length and not for use in automotive environments. For RF Exposure, the module was assessed for use at more than 20 cm from the body. When installing this module permanently into a host product to create a new Radio Equipment Directive device; the manufacturer responsible for the final product must assess if the combination of this module and the host equipment complies with the essential requirements of the RE Directive 2014/53/EU. SIMCom offers this information as a service to its customers to support the application and engineering efforts that use the products designed by SIMCom. The information provided is based on the requirements specifically from the customers. SIMCom has not undertaken any independent search for additional relevant information, including any information that may be in the customers possession. Furthermore, the system validation of the product designed by SIMCom within a larger electronic system remains the responsibility of the customer or the customers system integrator. All specifications supplied herein are subject to change without notice. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and

(2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision encouraged to try to correct the interference by one or more of the following measures:

-- Reorient or relocate the receiving antenna.

-- Increase the separation between the equipment and receiver.

-- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

-- Consult the dealer or an experienced radio/TV technician for help. Exposure to Radio Frequency Radiation. This equipment must be installed and operated in accordance with provided instructions, and the antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be collocated or operating in conjunction with any other antenna or transmitter. End-users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance. This Modular Approval is limited to OEM installation for mobile and fixed applications only. The antenna installation and operating configurations of this Modular, including any applicable source-based time averaging duty factor, antenna gain and cable loss must satisfy MPE categorical Exclusion Requirements of 2.1091. if the host is marketed so that end users do not have straight forward commonly used methods for access to remove the module so that the FCC ID of the module is visible; then an additional permanent label referring to the enclosed module: Contains Transmitter Module FCC ID: 2AJYU-

8BAE006 or Contains FCC ID: 2AJYU-8BAE006 must be used. Copyright This document contains the proprietary technical information which is the property of SIMCom Limited, copying of this document, giving it to others, the using or communication of the contents thereof are forbidden without the official authority by SIMCom. Offenders are liable to the payment of the damages. All rights are reserved in the event of grant of a patent or the registration of a utility model or design. All specifications supplied herein are subject to change without notice Copyright SIMCom Wireless Solutions Co., Ltd. 2017 A7608SA-H_User Manual_V1.00 2022-08-26 Contents Smart Machine Smart Decision Contents............................................................................................................................................... 5 Table Index.......................................................................................................................................... 7 Figure Index.........................................................................................................................................9 Revision History................................................................................................................................ 10 1 Introduction.................................................................................................................................... 11 1.1 Product Outline..........................................................................................................................11 1.2 Hardware Interface Overview................................................................................................... 11 1.3 Hardware Block Diagram..........................................................................................................13 1.4 Functional Overview................................................................................................................. 14 2 Package Information..................................................................................................................... 16 2.1 Pin Assignment Overview.........................................................................................................16 2.2 Pin Description.......................................................................................................................... 18 2.3 Mechanical Information............................................................................................................ 22 2.4 Footprint Recommendation.......................................................................................................23 3 Interface Application..................................................................................................................... 24 3.1 Power Supply............................................................................................................................ 24 3.1.1 Power Supply Design Guide...............................................................................................25 3.1.2 Recommended Power Supply Circuit.................................................................................26 3.1.3 Voltage Monitor.................................................................................................................. 26 3.2 Power on/Power off/Reset Function......................................................................................... 27 3.2.1 Power on............................................................................................................................. 27 3.2.2 Power off.............................................................................................................................28 3.2.3 Reset Function.....................................................................................................................29 3.3 UART Interface......................................................................................................................... 30 3.3.1 UART Design Guide...........................................................................................................30 3.3.2 RI and DTR Behavior......................................................................................................... 31 3.4 USB Interface............................................................................................................................ 32 3.5 USIM Interface..........................................................................................................................33 3.5.1 USIM Application Guide.................................................................................................... 33 3.6 PCM Interface........................................................................................................................... 36 3.6.1 PCM timing.........................................................................................................................36 3.6.2 PCM Application Guide......................................................................................................38 3.7 SD Interface...............................................................................................................................38 3.8 I2C Interface..............................................................................................................................39 3.9 SDIO Interface.......................................................................................................................... 40 3.10 SPI Interface............................................................................................................................ 40 3.11 Network status......................................................................................................................... 40 3.12 Flight Mode Control................................................................................................................41 3.13 Other interface......................................................................................................................... 42 3.13.1 Sink Current Source..........................................................................................................42 A7608SA-H_User Manual_V1.00 2022-08-26 3.13.2 ADC.................................................................................................................................. 43 3.13.3 LDO.................................................................................................................................. 43 Smart Machine Smart Decision 4 RF Specifications............................................................................................................................44 4.1 UMTS/LTE RF Specifications.................................................................................................. 44 4.2 UMTS/LTE Antenna Design Guide.......................................................................................... 46 4.3 GNSS..........................................................................................................................................47 4.3.1GNSS Technical specification...............................................................................................47 4.3.2 GNSS Application Guide......................................................................................................48 5 Electrical Specifications.................................................................................................................50 5.1 Absolute maximum ratings........................................................................................................50 5.2 Operating conditions................................................................................................................. 50 5.3 Operating Mode.........................................................................................................................51 5.3.1 Operating Mode Definition.................................................................................................51 5.3.2 Sleep mode.......................................................................................................................... 52 5.3.3 Minimum functionality mode and Flight mode..................................................................52 5.4 Current Consumption................................................................................................................ 53 5.5 ESD Notes................................................................................................................................. 53 6 SMT Production Guide................................................................................................................. 55 6.1 Top and Bottom View of A7608SA-H...................................................................................... 55 6.2 Label Information......................................................................................................................56 6.3 Typical SMT Reflow Profile..................................................................................................... 56 6.4 Moisture Sensitivity Level (MSL)............................................................................................ 57 6.5 Stencil Foil Design Recommendation.......................................................................................58 7 Packaging........................................................................................................................................59 Appendix............................................................................................................................................ 61 A. Reference Design........................................................................................................................61 B. Coding Schemes and Maximum Net Data Rates over Air Interface..........................................62 C. Related Documents..................................................................................................................... 65 D. Terms and Abbreviations........................................................................................................... 67 E. Safety Caution.............................................................................................................................69 A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Table Index Table 1: A7608SA-H frequency bands.................................................................................................................11 Table 2: General features......................................................................................................................................14 Table 3: Pin definition.......................................................................................................................................... 17 Table 4: IO parameters definition.........................................................................................................................18 Table 5: Pin description........................................................................................................................................18 Table 6: VBAT pins electronic characteristic....................................................................................................... 24 Table 7: Recommended Zener diode list.............................................................................................................. 25 Table 8: Power on timing and electronic characteristic........................................................................................28 Table 9: Power off timing and electronic characteristic....................................................................................... 29 Table 10: RESET pin electronic characteristic.....................................................................................................30 Table 11: USIM electronic characteristic in 1.8V mode (USIM_VDD=1.8V).................................................... 33 Table 12: USIM electronic characteristic 3.0V mode (USIM_VDD=2.95V)...................................................... 33 Table 13: Amphenol USIM socket pin description.............................................................................................. 35 Table 14: PCM format..........................................................................................................................................36 Table 15: PCM timing parameters........................................................................................................................37 Table 16: MMC/SD electronic characteristic (SD_DATA0-SD_DATA3SD_CLK and SD_CMD) *............. 38 Table 17: NETLIGHT pin status.......................................................................................................................... 41 Table 18: FLIGHTMODE pin status....................................................................................................................41 Table 19: Sink current electronic characteristic................................................................................................... 42 Table 20: ADC1 and ADC2 electronic characteristics............................................................................................43 Table 21: Electronic characteristic......................................................................................................................... 43 Table 22: Conducted transmission power...............................................................................................................43 Table 23: Operating frequencies............................................................................................................................ 44 Table 24: E-UTRA operating bands.......................................................................................................................44 Table 25: Conducted receive sensitivity.................................................................................................................44 Table 26: Reference sensitivity (QPSK).................................................................................................................44 Table 27: Trace loss...............................................................................................................................................46 Table 28: Recommended TVS...............................................................................................................................47 Table 29: Absolute maximum ratings...................................................................................................................50 Table 30: Recommended operating ratings.......................................................................................................... 50 Table 31: 1.8V Digital I/O characteristics*.......................................................................................................... 50 Table 32: Operating temperature.......................................................................................................................... 51 Table 33: Operating mode Definition...................................................................................................................51 Table 34: Current consumption on VBATPins (VBAT=3.8V)............................................................................53 Table 35: The ESD performance measurement table (Temperature: 25,Humidity: 45%)...............................53 Table 36: The description of label information.................................................................................................... 56 Table 37: Moisture Sensitivity Level and Floor Life........................................................................................... 57 Table 38: Tray size............................................................................................................................................... 60 Table 39: Small Carton size..................................................................................................................................60 Table 40: Big Carton size..................................................................................................................................... 60 Table 41: Coding Schemes and Maximum Net Data Rates over Air Interface.................................................... 62 Table 42: Related Documents...............................................................................................................................65 Table 43: Terms and Abbreviations...................................................................................................................... 67 A7608SA-H_User Manual_V1.00 2022-08-26 Table 44: Safety Caution...................................................................................................................................... 69 Smart Machine Smart Decision A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Figure Index Figure 1: A7608SA-H block diagram.................................................................................................................. 13 Figure 2: Pin assignment overview...................................................................................................................... 16 Figure 3: Dimensions (Unit: mm)........................................................................................................................ 22 Figure 4: Footprint recommendation (Unit: mm).................................................................................................23 Figure 5: VBAT voltage drop during burst emission (GSM/GPRS).................................................................... 24 Figure 6: Power supply application circuit...........................................................................................................25 Figure 7: Linear regulator reference circuit......................................................................................................... 26 Figure 8: Switching mode power supply reference circuit...................................................................................26 Figure 9: Reference power on/off circuit............................................................................................................. 27 Figure 10: Power on timing sequence.................................................................................................................. 27 Figure 11: Power off timing sequence..................................................................................................................29 Figure 12: Reference reset circuit........................................................................................................................ 29 Figure 13: UART full modem.............................................................................................................................. 30 Figure 14: UART null modem..............................................................................................................................30 Figure 15: Reference circuit of level shift............................................................................................................31 Figure 16: RI behaviourSMS and URC report.............................................................................................31 Figure 17: RI behaviourvoice call................................................................................................................32 Figure 18: USB reference circuit......................................................................................................................... 32 Figure 19: USIM interface reference circuit........................................................................................................ 34 Figure 20: Amphenol SIM card socket.................................................................................................................35 Figure 21: PCM_SYNC timing............................................................................................................................36 Figure 22: EXT codec to module timing..............................................................................................................36 Figure 23: Module to EXT codec timing............................................................................................................. 37 Figure 24: Audio codec reference circuit............................................................................................................. 38 Figure 25: SD reference circuit............................................................................................................................ 39 Figure 26: I2C reference circuit........................................................................................................................... 40 Figure 27: NETLIGHT reference circuit..............................................................................................................40 Figure 28: Flight mode switch reference circuit.................................................................................................. 41 Figure 29: ISINK reference circuit.......................................................................................................................42 Figure 30: Antenna matching circuit (MAIN_ANT)............................................................................................46 Figure 31: Antenna matching circuit (AUX_ANT)............................................................................................. 47 Figure 32: Active antenna circuit......................................................................................................................... 48 Figure 33: Passive antenna circuit (Default)........................................................................................................ 49 Figure 34: Top and bottom view of A7608SA-H................................................................................................. 55 Figure 35: Label information............................................................................................................................... 56 Figure 36: The ramp-soak-spike reflow profile of A7608SA-H.......................................................................... 57 Figure 37: packaging diagram..............................................................................................................................59 Figure 38: Tray drawing.......................................................................................................................................59 Figure 39: Small carton drawing.......................................................................................................................... 60 Figure 40: Big carton drawing............................................................................................................................. 60 Figure 41: Reference design.................................................................................................................................62 A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Revision History Data Version Description of change 2020-08-26 1.00 Original Author Ma Honggang Tianbao Yi A7608SA-H_User Manual_V1.00 2022-08-26 1 Introduction Smart Machine Smart Decision This document describes the electronic specifications, RF specifications, interfaces, mechanical characteristics and testing results of the SIMCom A7608SA-H module. With the help of this document and other software application notes/user guides, users can understand and use module to design and develop applications quickly. 1.1 Product Outline Aimed at the Europe market, the A7608SA-H module supportGSM, WCDMA and LTE. Users can choose the module according to the wireless network configuration. The supported radio frequency bands are described in the following table. Table 1: A7608SA-H frequency bands Standard Frequency A7608SA-

H WCDMA LTE-FDD Category GNSS GSM BAND2 BAND5 LTE-FDD B2 LTE-FDD B4 LTE-FDD B5 LTE-TDD B41 LTE-FDD B66 PCS1900 GSM850 CAT4 With a small physical dimension of 30*30*2.9 mm and with the functions integrated, the A7608SA-H module can meet almost any space requirement in users applications, such as smart phone, PDA, industrial handheld, machine-to-machine and vehicle application, etc. 1.2 Hardware Interface Overview The interfaces are described in detail in the next chapters include:

Power Supply USB Interface UART Interface MMC/SD Interface A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision SDIO Interface USIM Interface GPIO ADC LDO Power Output Current Sink Source PCM Interface SPI Interface I2C Interface A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 1.3 Hardware Block Diagram The block diagram of the A7608SA-H module is shown in the figure below. Figure 1: A7608SA-H block diagram A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 1.4 Functional Overview Table 2: General features Feature Power supply Power saving Radio frequency bands Transmitting power Implementation Single supply voltage 3.44.2V Current in sleep mode : <5mA Please refer to the table 1 UMTS power class:

--WCDMA :3 (0.25W) LTE power class: 3 (0.25W) Data Transmission Throughput Antenna GNSS SMS UMTS R99 speed: 384 kbps DL/UL HSPA+: 5.76 Mbps(UL), 42 Mbps(DL) HSDPA/HSUPA: 2.2 Mbps(UL), 2.8 Mbps(DL) LTE CAT 1: 10 Mbps(DL) LTE CAT 1: 5 Mbps(DL) UMTS/LTE main antenna. UMTS/LTE auxiliary antenna GNSS antenna GNSS engine (GPS,GLONASS) Protocol: NMEA MT, MO, CB, Text and PDU mode SMS storage: USIM card or ME(default) Transmission of SMS alternatively over CS or PS. USIM interface Support identity card: 1.8V/ 3V USIM application toolkit Phonebook management Support SAT class 3, GSM 11.14 Release 98 Support USAT Support phonebook types: DC,MC,RC,SM,ME,FD,ON,LD,EN Audio feature UART interface Support PCM interface Only support PCM master mode and short frame sync, 16-bit linear data formats A full modem serial port by default Baud rate: 300bps to 4Mbps(default:115200bps) Autobauding baud rate: 9600,19200,38400,57600,115200bps Can be used as the AT commands or data stream channel Support RTS/CTS hardware handshake Multiplex ability according to GSM 07.10 Multiplexer Protocol MMC/SD SDIO USB Support MMC and SD cards with 2.95 V on SD port Support SDIO with 1.8 V only on SDIO port USB 2.0 high speed interface A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Firmware upgrade Firmware upgrade over USB interface Physical characteristics Size:30*30*2.9m Weight:5.7 g Temperature range Normal operation temperature: -30C to +80C Extended operation temperature: -40C to +85C*

Storage temperature -45C to +90C

*Note: Module is able to make and receive voice calls, data calls, SMS and make GPRS

/EGPRS/UMTS/HSPA+/LTE traffic in -40 ~ +85. The performance will be reduced slightly from the 3GPP specifications if the temperature is outside the normal operating temperature range and still within the extreme operating temperature range. A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 2 Package Information 2.1 Pin Assignment Overview All functions of the A7608SA-H will be provided through 87 pads that will be connected to the customers platform. The following Figure is a high-level view of the pin assignment of the A7608SA-H. Figure 2: Pin assignment overview A7608SA-H_User Manual_V1.00 2022-08-26 Table 3: Pin definition Smart Machine Smart Decision Pin No. Pin name Pin No. Pin name 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 GND PWRKEY GND SPI_MISO SPI_CS USB_VBUS USB_DP VDD_1V8 USIM_DATA USIM_CLK SD_CMD SD_DATA1 SD_DATA3 SDIO_DATA1 SDIO_CMD SDIO_DATA3 GPIO3 HSIC_STROBE GND VBAT GND GND ISINK ADC1 STATUS NETLIGHT USIM_DET SCL GND AUX_ANT GND VBAT GND CTS 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 GND RESET SPI_CLK SPI_MOSI GND USB_DN GND USB_ID USIM_RST USIM_VDD SD_DATA0 SD_DATA2 SD_CLK SDIO_DATA2 SDIO_DATA0 SDIO_CLK GPIO6 HSIC_DATA VBAT GND NC (RESERVED) VDD_EXT ADC2 SD_DET GPIO43*

GPIO41 FLIGHTMODE SDA GND GND VBAT GND RTS RXD A7608SA-H_User Manual_V1.00 2022-08-26 69 71 73 75 77 79 81 83 85 87 RI TXD PCM_OUT PCM_SYNC GND GNSS_ANT GND COEX1*

BOOT_CFG0*

GPIO77 Smart Machine Smart Decision 70 72 74 76 78 80 82 84 86 DCD DTR PCM_IN PCM_CLK GND GND MAIN_ANT COEX2 COEX3*

NOTE: Before the normal power up, GPIO43COEX1, COEX3 and BOOT_CFG0 cannot be pulled up. 2.2 Pin Description Table 4: IO parameters definition Pin type Description PI PO AI AIO I/O DI DO DOH DOL PU PD Power input Power output Analog input Analog input/output Bidirectional input /output Digital input Digital output Digital output with high level Digital output with low level Pull up Pull down Table 5: Pin description Pin name Pin No. Default status Description Comment Power supply VBAT 38,39, 62,63 PI VDD_EXT 44 PO Power supply, voltage range:

3.44.2V. LDO power output for other external circuits with Max 150mA current output. Its output voltage is 0V by default. The voltage can be configured to 2.8V by AT If unused, keep it open. A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision command. 1.8V SMPS output with Max 50mA current output for external circuit, such as level shift circuit. If unused, keep it open. Ground VDD_1V8 15 PO GND 1,2,5, 10,14,37

,40,41,4 3,57,58, 60,61,64

,65,77,7 8,80,81 System Control PWRKEY RESET SD interface SD_CMD SD_DATA0 SD_DATA1 SD_DATA2 SD_DATA3 SD_CLK USIM interface 3 4 21 22 23 24 25 26 DI,PU System power on/off control input, active low. DI, PU System reset control input, active low. The high voltage is 0.8V;

RESET has been pulled up to 1.8V via 40Kohm resistor internally. DO I/O I/O I/O I/O DO SDIO command SDIO data SDIO clock If unused, keep them open. USIM_DATA 17 I/O,PU USIM Card data I/O, which has been pulled up via a 100KR resistor to USIM_VDD internally. Do not pull it up or down externally. USIM_RST 18 DO USIM Reset USIM_CLK 19 DO USIM clock All lines of USIM interface should be protected against ESD. USIM_VDD 20 PO Power output for USIM card, its output Voltage depends on USIM card type automatically. Its output current is up to 50mA. SPI interface SPI_CLK SPI_MISO SPI_MOSI 6 7 8 DO DI DO SPI clock output SPI master in/slave out data SPI master out/slave in data Only support SPI master mode. If unused, please keep them open. A7608SA-H_User Manual_V1.00 2022-08-26 SPI_CS USB 9 DO SPI chip-select output Smart Machine Smart Decision USB_VBUS 11 DI,PD USB_DN USB_DP USB_ID UART interface RTS CTS RXD RI DCD TXD DTR I2C interface SCL SDA SDIO interface SDIO_DATA1 SDIO_DATA2 SDIO_CMD SDIO_DATA0 SDIO_DATA3 SDIO_CLK HSIC interface HSIC_STROB E HSIC_DATA PCM interface PCM_OUT PCM_IN PCM_SYNC PCM_CLK GPIO NETLIGHT FLIGHTMODE 12 13 16 66 67 68 69 70 71 72 55 56 27 28 29 30 31 32 35 36 73 74 75 76 51 54 Valid USB detection input with 3.0~5.25V detection voltage Negative line of the differential, bi-directional USB signal. Positive line of the differential, bi-directional USB signal. High-speed USB ID input Request to send Clear to Send Receive Data Ring Indicator Carrier detects Transmit Data DTE get ready Keep it open. If unused, keep them open. I/O I/O DI DOH DI,PU DI,PU DOH DOH DOH DI,PU DO I2C clock output I/O I2C data input/output If unused, keep open, or else pull them up via 4.7K resistors to 1.8V. I/O I/O DO I/O I/O DO DO I/O DO DI DO DO DO DI,PU SDIO data1 SDIO data2 SDIO command SDIO data0 SDIO data3 SDIO clock For WLAN solution HSIC strobe wakeup HSIC data Reserved PCM data output. PCM data input. PCM data frame sync signal. PCM data bit clock. If unused, please keep them open. LED control output as network status indication. Flight Mode control input. High level(or open): Normal If unused, keep them open. DO NOT PULL UP GPIO43 DURING A7608SA-H_User Manual_V1.00 2022-08-26 STATUS GPIO41 GPIO43 GPIO3 GPIO6 SD_DET 49 52 50 33 34 48 USIM_DET 53 GPIO77 RF interface MAIN _ANT GNSS_ANT AUX_ANT Other interface ISINK ADC1 ADC2 COEX1 COEX2 COEX3 87 82 79 59 45 47 46 83 84 86 Smart Machine Smart Decision NORMAL UP!

POWER Mode Low level: Flight Mode Operating status output. High level: Power on and firmware ready Low level: Power off GPIO GPIO GPIO GPIO Default: GPIO Optional: SD card detecting input. H: SD card is removed L: SD card is inserted Default: GPIO Optional: USIM card detecting input. H: USIM is removed L: USIM is inserted GPIO DO IO IO IO IO IO IO IO AIO MAIN antenna soldering pad AI AI PI AI AI I/O I/O I/O GNSS antenna soldering pad Auxiliary antenna soldering pad Ground-referenced current sink. Analog-digital converter input 1 Analog-digital converter input 2 RF synchronizing between Wi-Fi and LTE. Boot configuration input. Module will be forced into USB download mode by connect 85 pin to VDD_1V8 during power up. If unused, please keep them open. If unused, keep them open. DO NOT PULL UP COEX1 AND COEX2 DURING NORMAL POWER UP!

Do place 2 test points for debug. DO NOT PULL UP BOOT_CFG0 DURING NORMAL POWER UP!

BOOT_CFG0 85 DI,PD NC 42 No connection. Keep it open A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 2.3 Mechanical Information The following figure shows the package outline drawing of A7608SA-H. Figure 3: Dimensions (Unit: mm) A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 2.4 Footprint Recommendation Figure 4: Footprint recommendation (Unit: mm) A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 3 Interface Application 3.1 Power Supply The power supply pins of A7608SA-H include 4 pins (pin 62&63, pin 38&39) named VBAT. The 4 VBAT pads supply the power to RF and baseband circuits directly. On VBAT pads, theripple current up to 2A typically, due to GSM/GPRS emission burst (every 4.615ms), may cause voltage drop. So the power supply for these pads must be able to provide sufficient current up to more than 2A in order to avoid the voltage drop is more than 300mV. The following figure shows the VBAT voltage ripple wave at the maximum power transmit phase. Figure 5: VBAT voltage drop during burst emission (GSM/GPRS) Note: The test condition: The voltage of power supply for VBAT is 3.8V, Cd=100 F tantalum capacitor (ESR=0.7) and Cf=100nF (Please refer to Figure 6Application circuit). Table 6: VBAT pins electronic characteristic Symbol VBAT IVBAT(peak) Description Module power voltage Module power peak current in normal mode. IVBAT(average) Module power average current in normal mode IVBAT(sleep) Power supply current in sleep mode Min. Typ. Max. Unit 3.4

3.8 2 4.2

V A Please refer to the table 34 IVBAT(power-off) Module power current in power off mode.

20 uA A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 3.1.1 Power Supply Design Guide Make sure that the voltage on the VBAT pins will never drop below 3.4V, even during a transmit burst, when current consumption may rise up to 2A. If the voltage drops below 3.4V, the RF performance may be affected. Note: If the power supply for VBAT pins can support up to 2A, using a total of more than 300uF capacitors is recommended, or else users must using a total of 1000uF capacitors typically, in order to avoid the voltage drop is more than 300mV. Some multi-layer ceramic chip (MLCC) capacitors (0.1/1uF) with low ESR in high frequency band can be used for EMC. These capacitors should be put as close as possible to VBAT pads. Also, users should keep VBAT trace on circuit board wider than 2 mm to minimize PCB trace impedance. The following figure shows the recommended circuit. Figure 6: Power supply application circuit In addition, in order to guard for over voltage protection, it is suggested to use a zener diode with 5.1V reverse zener voltage and more than 500mW power dissipation. Table 7: Recommended Zener diode list No. Manufacturer On semi 1 Part Number MMSZ5231BT1G Power dissipation 500mW 2 3 4 Prisemi Vishay Crownpo PZ3D4V2H MMSZ4689-V CDZ55C5V1SM 500mW 500mW 500mW Package SOD123 SOD323 SOD123 0805 A7608SA-H_User Manual_V1.00 2022-08-26 3.1.2 Recommended Power Supply Circuit Smart Machine Smart Decision It is recommended that a switching mode power supply or a linear regulator power supply is used. It is important to make sure that all the components used in the power supply circuit can resist a peak current up to 2A. The following figure shows the linear regulator reference circuit with 5V input and 3.8V output. Figure 7: Linear regulator reference circuit If there is a big voltage difference between input and output for VBAT power supply, or the efficiency is extremely important, then a switching mode power supply will be preferable. The following figure shows the switching mode power supply reference circuit. Figure 8: Switching mode power supply reference circuit Note: The Switching Mode power supply solution for VBAT must be chosen carefully against Electro Magnetic Interference and ripple current from depraving RF performance. 3.1.3 Voltage Monitor To monitor the VBAT voltage, the AT command AT+CBC can be used. For monitoring the VBAT voltage outside or within a special range, the AT command AT+CVALARM can be used to enable the under-voltage warning function. If users need to power off A7608SA-H, when the VBAT voltage is out of a range, the AT command AT+CPMVT can be used to enable under-voltage power-off function. Note: Under-voltage warning function and under-voltage power-off function are disabled by default. For more information about these AT commands, please refer to Document [1]. A7608SA-H_User Manual_V1.00 2022-08-26 3.2 Power on/Power off/Reset Function 3.2.1 Power on Smart Machine Smart Decision A7608SA-H can be powered on by pulling the PWRKEY pin down to ground. The PWRKEY pin has been pulled up with a diode to 1.8V internally, so it does not need to be pulled up externally. It is strongly recommended to put a100nF capacitor, an ESD protection diode, close to the PWRKEY pin as it would strongly enhance the ESD performance of PWRKEY pin. Please refer to the following figure for the recommended reference circuit. Figure 9: Reference power on/off circuit Note: Module could be automatically power on by connecting PWRKEY pin to ground via 0R resistor directly. The power-on scenarios are illustrated in the following figure. VBAT PWRKEY

(Input) STATUS

(Output) UART Port USB Port Ton Ton(status) Ton(uart) Ton(usb) Undefined Undefined Active Active Figure 10: Power on timing sequence A7608SA-H_User Manual_V1.00 2022-08-26 Table 8: Power on timing and electronic characteristic Smart Machine Smart Decision Symbol Ton Ton(status) Ton(uart) Ton(usb) VIH VIL Min. Parameter The time of active low level impulse of PWRKEY pin to power on module The time from power-on issue to STATUS pin output high level(indicating power up ready ) The time from power-on issue to UART port ready 11 12 100 The time from power-on issue to USB port ready Input high level voltage on PWRKEY pin Input low level voltage on PWRKEY pin 11 0.6

-0.3 Typ. Max. Unit 500 13 12 12 0.8 0

1.8 0.5 ms s s s V V 3.2.2 Power off The following methods can be used to power off A7608SA-H. Method 1: Power off A7608SA-H by pulling the PWRKEY pin down to ground. Method 2: Power off A7608SA-H by AT command AT+CPOF. Method 3: over-voltage or under-voltage automatic power off. The voltage range can be set by AT command AT+CPMVT. Method 4: over-temperature or under-temperature automatic power off. Note: If the temperature is outside the range of -30~+80, some warning will be reported via AT port. If the temperature is outside the range of -40~+85, A7608SA-H will be powered off automatically. For details about AT+CPOF and AT+CPMVT, please refer to Document [1]. These procedures will make modules disconnect from the network and allow the software to enter a safe state, and save data before module be powered off completely. The power off scenario by pulling down the PWRKEY pin is illustrated in the following figure. A7608SA-H_User Manual_V1.00 2022-08-26 Figure 11: Power off timing sequence Smart Machine Smart Decision Table 9: Power off timing and electronic characteristic Symbol Parameter Time value Min. Typ. Max. Unit Toff Toff(status) Toff(uart) Toff(usb) Toff-on The active low level time pulse on PWRKEY pin to power off module The time from power-off issue to STATUS pin output low level(indicating power off )*

The time from power-off issue to UART port off The time from power-off issue to USB port off The buffer time from power-off issue to power-on issue 2.5

25 14 27 0 26 15 28

s s s s s

*Note: The STATUS pin can be used to detect whether module is powered on or not. When module has been powered on and firmware goes ready, STATUS will be high level, or else STATUS will still low level. 3.2.3 Reset Function A7608SA-H can be reset by pulling the RESET pin down to ground. Note: This function is only used as an emergency reset, when AT command AT+CPOF and the PWRKEY pin all have lost efficacy. The RESET pin has been pulled up with a 40K resistor to 1.8V internally, so it does not need to be pulled up externally. It is strongly recommended to put a100nF capacitor and an ESD protection diode close to the RESET pin. Please refer to the following figure for the recommended reference circuit. Figure 12: Reference reset circuit A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Table 10: RESET pin electronic characteristic Symbol Description Min. Typ. Max. Unit Treset VIH VIL The active low level time impulse on RESET pin to reset module Input high level voltage Input low level voltage 50 100 500 ms 1.17

-0.3 1.8 0 2.1 0.8 V V 3.3 UART Interface A7608SA-H provides a 7-wire UART (universal asynchronous serial transmission) interface as DCE (Data Communication Equipment). AT commands and data transmission can be performed through UART interface. 3.3.1 UART Design Guide The following figures show the reference design. Figure 13: UART full modem Figure 14: UART null modem A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision The A7608SA-H UART is 1.8V voltage interface. If users UART application circuit is 3.3V voltage interface, should be used for voltage matching. The TXB0108RGYR provided by Texas Instruments is recommended. The following figure shows the voltage matching reference design. shifter circuits the level VDD_1V8 or External 1V8 MODULE 100nF 3.3 V 100nF TXB0108RGYR VCCA VCCB OE GND TXD RXD RTS CTS DTR DCD RI UART port A1 A2 A3 A4 A5 A6 A7 A8 B1 B2 B3 B4 B5 B6 B7 B8 47K 47K TXD_3.3V RXD_3.3V RTS_3.3V CTS_3.3V DTR_3.3V DCD_3.3V RI_3.3V Figure 15: Reference circuit of level shift To comply with RS-232-C protocol, the RS-232-C level shifter chip should be used to connect A7608SA-H to the RS-232-C interface, for example SP3238ECA, etc. Note: A7608SA-H supports the following baud rates: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600, 3200000, 3686400, 4000000bps. The default band rate is 115200bps. 3.3.2 RI and DTR Behavior The RI pin can be used to interrupt output signal to inform the host controller such as application CPU. Normally RI will keep high level until certain conditions such as receiving SMS, or a URC report coming, and then it will change to low level. It will stay low until the host controller clears the interrupted event with AT+CRIRS AT command. Figure 16: RI behaviourSMS and URC report A7608SA-H_User Manual_V1.00 2022-08-26 Normally RI will be kept at a high level until a voice call, then it will output periodic rectangular wave with 5900ms low level and 100ms high level. It will output this kind of periodic rectangular wave until the call is answered or hung up. Smart Machine Smart Decision Figure 17: RI behaviourvoice call Note: For more details of AT commands about UART, please refer to document [1] and [22]. DTR pin can be used to wake A7608SA-H from sleep. When A7608SA-H enters sleep mode, pulling down DTR can wake A7608SA-H. 3.4 USB Interface The A7608SA-H contains a USB interface compliant with the USB2.0 specification as a peripheral, but the USB charging function is not supported. A7608SA-H can be used as a USB device. A7608SA-H supports the USB suspend and resume mechanism which can reduce power consumption. If there is no data transmission on the USB bus, A7608SA-H will enter suspend mode automatically, and will be resumed by some events such as voice call, receiving SMS, etc. Figure 18: USB reference circuit Because of the high bit rate on USB bus, more attention should be paid to the influence of the junction capacitance of the ESD component on USB data lines. Typically, the capacitance should be less than 1pF. It is recommended to use an ESD protection component such as ESD9L5.0ST5G provided by On Semiconductor (www.onsemi.com ). D3 is suggested to select the diode with anti-ESD and voltage surge function, or customer could A7608SA-H_User Manual_V1.00 2022-08-26 add a ZENER diode for surge clamping. The recommend diodes please refer to table 7. NoteThe USB_DN and USB_DP nets must be traced by 90Ohm+/-10% differential impedance. Smart Machine Smart Decision 3.5 USIM Interface A7608SA-H supports both 1.8V and 3.0V USIM Cards. Table 11: USIM electronic characteristic in 1.8V mode (USIM_VDD=1.8V) Symbol Parameter Min. Typ. Max. Unit LDO power output voltage 1.75 1.8 1.95 High-level input voltage 0.65*USIM_VDD Low-level input voltage

-0.3 High-level output voltage USIM_VDD -0.45 Low-level output voltage 0

0

0 USIM_VDD +0.3 0.35*USIM_VDD V USIM_VDD 0.45 V V Table 12: USIM electronic characteristic 3.0V mode (USIM_VDD=2.95V) Symbol Parameter Min. Typ. Max. Unit LDO power output voltage 2.75 2.95 3.05 High-level input voltage 0.65*USIM_VDD Low-level input voltage

-0.3 High-level output voltage USIM_VDD -0.45 Low-level output voltage 0

0

0 USIM_VDD +0.3 0.25*USIM_VDD V USIM_VDD 0.45 V V USIM_ VDD VIH VIL VOH VOL USIM_ VDD VIH VIL VOH VOL V V V V 3.5.1 USIM Application Guide It is recommended to use an ESD protection component such as ESDA6V1W5 produced by ST

(www.st.com ) or SMF15C produced by ON SEMI (www.onsemi.com ). Note that the USIM peripheral circuit should be close to the USIM card socket. The following figure shows the 6-pin SIM card holder reference circuit. A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Figure 19: USIM interface reference circuit Note: USIM_DATA has been pulled up with a 100K resistor to USIM_VDD in module. A 100nF capacitor on USIM_VDD is used to reduce interference. For more details of AT commands about USIM, please refer to document [1].USIM_CLK is very important signal, the rise time and fall time of USIM_CLK should be less than 40ns, otherwise the USIM card might not be initialized correctly. A7608SA-H_User Manual_V1.00 2022-08-26 Recommended USIM Card Holder Smart Machine Smart Decision It is recommended to use the 6-pin USIM socket such as C707 10M006 512 produced by Amphenol. User can visit http://www.amphenol.com for more information about the holder. Figure 20: Amphenol SIM card socket Table 13: Amphenol USIM socket pin description Pin C1 C2 C3 C5 C6 C7 Signal USIM_VDD USIM_RST USIM_CLK GND VPP USIM_DATA Description USIM Card Power supply. USIM Card Reset. USIM Card Clock. Connect to GND. USIM Card data I/O. A7608SA-H_User Manual_V1.00 2022-08-26 3.6 PCM Interface Smart Machine Smart Decision A7608SA-H provides a PCM interface for external codec, which can be used in master mode with short sync and 16 bits linear format. Table 14: PCM format Characteristics Line Interface Format Data length Specification Linear(Fixed) 16bits(Fixed) PCM Clock/Sync Source Master Mode(Fixed) PCM Clock Rate 2048 KHz (Fixed) PCM Sync Format Short sync(Fixed) Data Ordering MSB Note: For more details about PCM AT commands, please refer to document [1]. 3.6.1 PCM timing A7608SA-H supports 2.048 MHz PCM data and sync timing for 16 bits linear format codec. Figure 21: PCM_SYNC timing Figure 22: EXT codec to module timing A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Figure 23: Module to EXT codec timing Table 15: PCM timing parameters Parameter Description Min. Typ. Max. Unit T(sync) PCM_SYNC cycle time T(synch) PCM_SYNC high level time T(syncl) PCM_SYNC low level time T(clk) T(clkh) T(clkl) T(susync) T(hsync) T(sudin) T(hdin) PCM_CLK cycle time PCM_CLK high level time PCM_CLK low level time PCM_SYNC setup time high before falling edge of PCM_CLK PCM_SYNC hold time after falling edge of PCM_CLK PCM_IN setup time before falling edge of PCM_CLK PCM_IN hold PCM_CLK time after falling edge of T(pdout) Delay from PCM_CLK rising to PCM_OUT valid T(zdout) Delay from PCM_CLK falling to PCM_OUT HIGH-Z 60 60 125 488 124.5 488 244 244 122 366 60 60 s ns s ns ns ns ns ns ns ns ns ns A7608SA-H_User Manual_V1.00 2022-08-26 3.6.2 PCM Application Guide The following figure shows the external codec reference design. Smart Machine Smart Decision Figure 24: Audio codec reference circuit 3.7 SD Interface A7608SA-H provides a 4-bit SD/MMC interface with clock rate up to 200 MHz, The voltage of MMC/SD interface is 2.95V, which is compatible with SDIO Card Specification (version 3.0) and Secure Digital (Physical Layer Specification, version 3.0).It supports up to 32GB SD cards. Table 16: MMC/SD electronic characteristic (SD_DATA0-SD_DATA3 SD_CLK and SD_CMD) *

Symbol Parameter VDD_SD LDO power output voltage**

Min. 2.75 Typ. 2.85 Max. 3.05 Unit V VIH VIL VOH VOL Note:

High-level input voltage 0.65VDD_EXT Low-level input voltage

-0.3

0 VDD_EXT+0.3 V 0.25VDD_EXT V High-level output voltage VDD_EXT-0.4 2.85 VDD_EXT Low-level output voltage 0 0 0.45 V V

*Be different from SD_DATA0-SD_DATA3 SD_CLK and SD_CMD SD_DET is 1.8V operation voltage. Customer should provide VDD_SD for SD card and the current should more than 350mA. ESD/EMI components should be arranged beside SD card socket. Refer to the following application circuit. A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Figure 25: SD reference circuit SD card layout guide lines:

Protect other sensitive signals/circuits from SD card signals. Protect SD card signals from noisy signals (clocks, SMPS, etc.). Up to 200 MHz clock rate, 50 nominal, 10% trace impedance CLK to DATA/CMD length matching < 1 mm 1524 termination resistor on clock lines near module Total routing length < 50 mm recommended Routing distance from module clock pin to termination resistor < 5 mm Spacing to all other signals = 2x line width Bus capacitance < 15 pF 3.8 I2C Interface A7608SA-H provides a I2C interface compatible with I2C specification, version 5.0, with clock rate up to 400 kbps. Its operation voltage is 1.8V. The following figure shows the I2C bus reference design. A7608SA-H_User Manual_V1.00 2022-08-26 Figure 26: I2C reference circuit Smart Machine Smart Decision NoteSDA and SCL do not have pull-up resistors in module. So, 2 external pull up resistors are needed in application circuit. AT+CRIIC and AT+CWIIC AT commands could be used to read/write register values of the I2C peripheral devices. For more details about AT commands please refer to document [1]. 3.9 SDIO Interface A7608SA-H provides a 4 bit 1.8V SDIO interface for WLAN solution. The default WLAN IC is QCA9377, and the application need software support. This part do not support now, need for future develop. 3.10 SPI Interface A7608SA-H provides a SPI interface as a master only. Its operation voltage is 1.8V, and its clock rate is up to 26 MHz. NoteFor more details of the AT commands about the SPI, please refer to document [1]. 3.11 Network status The NETLIGHT pin is used to control Network Status LED, its reference circuit is shown in the following figure. Figure 27: NETLIGHT reference circuit Note: The value of the resistor named R depends on the LED characteristic. A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Table 17: NETLIGHT pin status NETLIGHT pin status Module status Always On Searching Network; Call Connect(include VOLTE,SRLTE) 200ms ON, 200ms OFF Data Transmit; 4G registered;

800ms ON, 800ms OFF 2G/3G registered network OFF Power off ;Sleep Note: NETLIGHT output low level as OFF, and high level as ON. 3.12 Flight Mode Control The FLIGHTMODE pin can be used to control A7608SA-H to enter or exit the Flight mode. In Flight mode, the RF circuit is closed to prevent interference with other equipments and minimize current consumption. Bidirectional ESD protection component suggested to add on is FLIGHTMODE pin, its reference circuit is shown in the following figure. Figure 28: Flight mode switch reference circuit Table 18: FLIGHTMODE pin status FLIGHTMODE pin status Input Low Level Input High Level Module operation Flight Mode: RF is closed AT+CFUN=0: RF is closed AT+CFUN=1:RF is working A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 3.13 Other interface 3.13.1 Sink Current Source The ISINK pin is VBAT tolerant and intended to drive some passive devices, such as LCD backlight and white LED, etc. Its output current can be up to 40mA and be set by the AT command AT+ CLEDITST. Table 19: Sink current electronic characteristic Symbol Description VISINK IISINK Voltage tolerant Current tolerant Min. 0.5 0 Typ.

Max. VBAT 40 Unit V mA ISINK is a ground-referenced current sink. The following figure shows its reference circuit. Figure 29: ISINK reference circuit Note: The sinking current can be adjusted to meet the design requirement through the AT command AT+ CLEDITST =<0>, <value>.The value ranges from 0 to 8, on behalf of the current from 0mA to 40mA by 5mA step. A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 3.13.2 ADC A7608SA-H has 2 dedicated ADC pins named ADC1 and ADC2.They are available for digitizing analog signals such as battery voltage and so on. These electronic specifications are shown in the following table. Table 20: ADC1 and ADC2 electronic characteristics Characteristics Resolution Conversion time Input Range Input serial resistance Min. 0.1 1 Typ. 15 442 Max. 1.7 Unit Bits ms V M Note: AT+CADC and AT+CADC2 can be used to read the voltage of the ADC1 and ADC2 pins, for more details, please refer to document [1]. 3.13.3 LDO A7608SA-H has a LDO power output, named VDD_EXT. its output voltage is 0V by default, Users can switch the LDO on or off by the AT command AT+CVAUXS and configure its output voltage by the AT command AT+CVAUXV. Table 21: Electronic characteristic Symbol VVDD_EXT IO Description Output voltage Output current Min. 1.7

Typ. 2.95

Max. 3.05 150 Unit V mA NoteFor more details of AT commands about VDD_EXT, please refer to document [1]. A7608SA-H_User Manual_V1.00 2022-08-26 4 RF Specifications 4.1 UMTS/LTE RF Specifications Smart Machine Smart Decision Table 22: Operating frequencies Frequency WCDMA B2 WCDMA B5 Receiving 1932.4-1987.6 MHz 871.4-891.6MHz Transmission 1852.4-1907.6 MHz 826.4-846.6 MHz The LTE Operating frequencies are shown in the following table 24. GPS 1574.4 1576.44 MHz

Table 23: E-UTRA operating bands E-UTRA operating band Uplink (UL) operating band 2 4 5 41 66 1850~1910 MHz 1710~1755MHz 824849 MHz 2496~2690 MHz 1710~1780MHz Table 24: Conducted receive sensitivity Downlink(DL) band 1930~1990 MHz 2110~2155MHz 869894MHz 2496~2690 MHz 2110-2200MHz operating Duplex Mode FDD FDD FDD TDD FDD Frequency WCDMA 2 WCDMA 8 LTE FDD Receive sensitivity(Typical) Receive sensitivity(MAX)

< -110dBm

< -110dBm See table 26. 3GPP 3GPP 3GPP Table 25: Reference sensitivity (QPSK) A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision E-UTRA band 3GPP standard Test value 3GPP standard 1.4 MHz 3MHz 5MHz 10MHz 10 MHz 15 MHz 20 MHz 2 4 5 41 66

-102

-104

-99

-101

-96.3

-99.3

-103.2

-100.2

-98

-104

-101

-97.3

-99.3

-94.3

-96.3

-95

-94.3

-96.3

-97

-99

-99

-97

-99

-92.5

-94.5

-92.5

-94.5

-91.3

-93.3

-91.3

-93.3 Duplex FDD FDD FDD TDD FDD A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 4.2 UMTS/LTE Antenna Design Guide Users should connect antennas to A7608SA-Hs antenna pads through micro-strip line or other types of RF trace and the trace impedance must be controlled in 50. SIMCom recommends that the following the total requirements:

insertion loss between the antenna pads and antennas should meet Table 26: Trace loss Frequency 700MHz-960MHz 1710MHz-2170MHz 2300MHz-2650MHz Loss

<0.5dB

<0.9dB

<1.2dB To facilitate the antenna tuning and certification test, a RF connector and an antenna matching circuit should be added. The following figure is the recommended circuit. Figure 30: Antenna matching circuit (MAIN_ANT) In above figure, the components R1, C1, C2 and R2 are used for antenna matching, the values of components can only be achieved after the antenna tuning and usually provided by antenna vendor. By default, the R1, R2 are 0 resistors, and the C1, C2 are reserved for tuning. The component D1 is a TVS for ESD protection, and it is optional for users according to application environment. The RF test connector is used for the conducted RF performance test, and should be placed as close as to the modules MAIN_ANT pin. The traces impedance between A7608SA-H and antenna must be controlled in 50. A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Figure 31: Antenna matching circuit (AUX_ANT) In above figure, R3, C3, C4 and R4 are used for auxiliary antenna matching. By default, the R3, R4 are 0resistors, and the C3, C4 are reserved for tuning. D2 is a TVS for ESD protection, and it is optional for users according to application environment. Two TVS are recommended in the table below. Table 27: Recommended TVS Package 0201 0402 Part Number LXES03AAA1-154 LXES15AAA1-153 Vender Murata Murata Note SIMCom suggests the LTE auxiliary antenna to be kept on, since there are many high bands in the designing of TDD-LTE, such as band38, band40 and band41. Because of the high insert loss of the RF cable and layout lines, the receiver sensitivity of these bands above will have risk to meet the authentication without the diversity antenna. For more details about auxiliary antenna design notice, please refer to document [25]. max antenna gain 4.3 GNSS A7608SA-H merges GNSS (GPS/GLONASS) satellite and network information to provide a high-

availability solution that offers industry-leading accuracy and performance. This solution performs well, even in very challenging environmental conditions where conventional GNSS receivers fail, and provides a platform to enable wireless operators to address both location-based services and emergency mandates. 4.3.1 GNSS Technical specification Tracking sensitivity: -159 dBmGPS/-158 dBmGLONASS A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Cold-start sensitivity: -148 dBm Accuracy (Open Sky): 2.5m (CEP50) TTFF (Open Sky) : Hot start <1s, Cold start<35s Receiver Type: 16-channel, C/A Code GPS L1 Frequency: 1575.421.023MHz GLONASS: 1597.5~1605.8 MHz Update rate: Default 1 Hz GNSS data format: NMEA-0183 GNSS Current consumption : 100mA (GSM/CDMA 1X/UMTS/LTE Sleep ,in total on VBAT pins) GNSS antenna: Passive/Active antenna Note: If the antenna is active type, the power should be given by main board because there is no power supply on the GPS antenna pad. If the antenna is passive, it is suggested that the external LNA should be used. 4.3.2 GNSS Application Guide Users can adopt an active antenna or a passive antenna to A7608SA-H. If using a passive antenna, an external LNA is a must to get better performance. The following figures are the reference circuits. Figure 32: Active antenna circuit A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision Figure 33: Passive antenna circuit (Default) In above figures, the components C1, L1 and L2 are used for antenna matching. Usually, the values of the components can only be achieved after antenna tuning and usually provided by antenna vendor. C2 is used for DC blocking. L3 is the matching component of the external LNA, and the value of L3 is determined by the LNA characteristic and PCB layout. Both VDD of active antenna and V_LNA need external power supplies which should be considered according to active antenna and LNA characteristic. LDO/DCDC is recommended to get lower current consuming by shutting down active antennas and LNA when GNSS is not working. GNSS can be tested by NMEA port. NMEA sentences can be obtained through UART or USB automatically. NMEA sentences include GSV, GGA, RMC, GSA, and VTG. Before using GNSS, user should configure A7608SA-H in proper operating mode by AT command. Please refer to related documents for details. A7608SA-H can also get position location information through AT directly. Note: GNSS is closed by default and can be started by AT+CGPS. The AT command has two parameters, the first is on/off, and the second is GNSS mode. Default mode is standalone mode. AGPS mode needs more support from the mobile telecommunication network. Please refer to document [24] for more details. A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 5 Electrical Specifications 5.1 Absolute maximum ratings Absolute maximum rating for digital and analog pins of A7608SA-H are listed in the following table:

Table 28: Absolute maximum ratings Parameter Voltage at VBAT Voltage at USB_VBUS Voltage at digital pins

(RESET,SPI,Keypad,GPIO,I2C,UART,PCM) Voltage at digital pins (SD,USIM) Voltage at PWRKEY Min.

-0.5

-0.5

-0.3

-0.3

-0.3 Typ.

Max. 6.0 5.85 2.1 3.05 1.8 Unit V V V V 5.2 Operating conditions Table29: Recommended operating ratings Parameter Voltage at VBAT Voltage at USB_VBUS Min. 3.4 3.0 Typ. 3.8 5.0 Max. 4.2 5.25 Unit V V Table 30: 1.8V Digital I/O characteristics*

Parameter Description VIH VIL High-level input voltage Low-level input voltage Min. 1.17

-0.3 Typ. 1.8 0 Max. Unit 2.1 0.63 V V A7608SA-H_User Manual_V1.00 2022-08-26 VOH VOL IOH IOL IIH IIL High-level output voltage 1.35 Low-level output voltage High-level output current(no pull down resistor) Low-level output current(no pull up resistor) Input high leakage current (no pull down resistor) Input low leakage current(no pull up resistor) 0

-1

2

-2

Smart Machine Smart Decision 1.8 0.45

1

V V mA mA uA uA

*Note: These parameters are for digital interface pins, such as SPI, GPIOs (NETLIGHT, FLIGHTMODE, STATUS, USIM_DET, SD_DET), SDIO, I2C, UART, PCM, COEXn, and BOOT_CFG0. The operating temperature of A7608SA-H is listed in the following table. Table 31: Operating temperature Parameter Normal operation temperature Extended operation temperature*

Storage temperature Min.

-30

-40

-45 Typ. 25 25 25 Max. 80 85

+90 Unit

*Note: Module is able to make and receive voice calls, data calls, SMS and make GSM/CDMA 1X/UMTX/LTE traffic in -40 ~ +85 . The performance will be reduced slightly from the 3GPP specifications if the temperature is outside the normal operating temperature range and still within the extreme operating temperature range. 5.3 Operating Mode 5.3.1 Operating Mode Definition The table below summarizes the various operating modes of A7608SA-H product. Table 32: Operating mode Definition Mode Function n UMTS/LTE Sleep o i t a r e p o l a m r o N UMTS/LTE Idle UMTS/LTE Talk In this case, the current consumption of module will be reduced to the minimal level and the module can still receive paging message and SMS. Software is active. Module is registered to the network, and the module is ready to communicate. Connection between two subscribers is in progress. In this case, the power consumption depends on network settings such as DTX off/on, A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision FR/EFR/HR, hopping sequences, and antenna. Module is ready for data transmission, but no data is currently sent or received. In this case, power consumption depends on network settings. There is data transmission in progress. In this case, power consumption is related to network settings (e.g. power control level);

uplink/downlink data rates, etc. AT command AT+CFUN=0 AT+CSCLK=1 can be used to set the module to a minimum functionality mode without removing the power supply. In this mode, the RF part of the module will not work and the USIM card will not be accessible, but the serial port and USB port are still accessible. The power consumption in this mode is lower than normal mode. AT command AT+CFUN=4 or pulling down the FLIGHTMODE pin can be used to set the module to flight mode without removing the power supply. In this mode, the RF part of the module will not work, but the serial port and USB port are still accessible. The power consumption in this mode is lower than normal mode. Module will go into power off mode by sending the AT command AT+CPOF or pull down the PWRKEY pin, normally. In this mode the power management unit shuts down the power supply, and software is not active. The serial port and USB are is not accessible. UMTS/LTE Standby UMTS/LTE Data transmission Minimum functionality mode Flight mode Power off 5.3.2 Sleep mode In sleep mode, the current consumption of module will be reduced to the minimal level, and module can still receive paging message and SMS. Several hardware and software conditions must be satisfied together in order to let A7608SA-H enter into sleep mode:

1. UART condition 2. USB condition 3. Software condition Note: Before designing, pay attention to how to realize sleeping/waking function and refer to Document [26] for more details. 5.3.3 Minimum functionality mode and Flight mode Minimum functionality mode ceases a majority function of module, thus minimizing the power consumption. This mode is set by the AT command which provides a choice of the functionality levels. AT+CFUN=0: Minimum functionality AT+CFUN=1: Full functionality (Default) A7608SA-H_User Manual_V1.00 2022-08-26 AT+CFUN=4: Flight mode Smart Machine Smart Decision If A7608SA-H has been set to minimum functionality mode, the RF function and USIM card function will be closed. In this case, the serial port and USB are still accessible, but RF function and USIM card will be unavailable. If A7608SA-H has been set to flight mode, the RF function will be closed. In this case, the serial port and USB are still accessible, but RF function will be unavailable. When A7608SA-H is in minimum functionality or flight mode, it can return to full functionality by the AT command AT+CFUN=1. 5.4 Current Consumption The current consumption is listed in the table below. Table 33: Antenna Gain(dBi) Technology Standard Antenna Gain(dBi) GSM GSM WCDMA WCDMA LTE LTE LTE LTE LTE 850 1900 band 2 Band 5 band 2 Band 4 band 5 band 41 band 66 2 3 3 2 3 6 2 9 6 5.5 ESD Notes A7608SA-H is sensitive to ESD in the process of storage, transporting, and assembling. When A7608SA-H is mounted on the users mother board, the ESD components should be placed beside the connectors which human body mayt touch, such as USIM card holder, audio jacks, switches, keys, etc. The following table shows the A7608SA-H ESD measurement performance without any external ESD component. Table 34: The ESD performance measurement table (Temperature: 25, Humidity: 45%) Part VBAT,GND Contact discharge Air discharge

+/-6K

+/-12K A7608SA-H_User Manual_V1.00 2022-08-26 Antenna port USB UART Other PADs

+/-5K

+/-4K

+/-3K

+/-3K Smart Machine Smart Decision

+/-10K

+/-8K

+/-6K

+/-6K A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 6 SMT Production Guide 6.1 Top and Bottom View of A7608SA-H Figure 34: Top and bottom view of A7608SA-H A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 6.2 Label Information Figure 35: Label information Table 35: The description of label information No. A B C D E F Description LOGO Module part number Project name Serial number International mobile equipment identity QR code 6.3 Typical SMT Reflow Profile SIMCom provides a typical soldering profile. Therefore the soldering profile shown below is only a generic recommendation and should be adjusted to the specific application and manufacturing A7608SA-H_User Manual_V1.00 2022-08-26 constraints. Smart Machine Smart Decision Figure 36: The ramp-soak-spike reflow profile of A7608SA-H Note: For more details about secondary SMT, please refer to the document [21]. 6.4 Moisture Sensitivity Level (MSL) A7608SA-H is qualified to Moisture Sensitivity Level (MSL) 3 in accordance with JEDEC J-STD-

033. If the prescribed time limit is exceeded, users should bake modules for 192 hours in drying equipment (<5% RH) at 40+5/-0C, or 72 hours at 85+5/-5C. Note that plastic tray is not heat-

resistant, and only can be baked at 45 C. Table 36: Moisture Sensitivity Level and Floor Life Moisture Sensitivity Level

(MSL) 1 2 2a 3 4 5 5a 6 Floor Life (out of bag) at factory ambient30C/60% RH or as stated Unlimited at 30/85% RH 1 year 4 weeks 168 hours 72 hours 48 hours 24 hours Mandatory bake before use. After bake, it must be reflowed within the time limit specified on the label. NOTE: IPC / JEDEC J-STD-033 standard must be followed for production and storage. A7608SA-H_User Manual_V1.00 2022-08-26 6.5 Stencil Foil Design Recommendation The recommended thickness of stencil foil is more than 0.15mm. Smart Machine Smart Decision A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision 7 Packaging A7608SA-H module support tray packaging. Figure 37: packaging diagram Module tray drawing Figure 38: Tray drawing A7608SA-H_User Manual_V1.00 2022-08-26 Table 37: Tray size Length3mm Width3mm 242. 0 Small carton drawing 161.0 Smart Machine Smart Decision Numbe r 15 Figure 39: Small carton drawing Table 38: Small Carton size Length10mm Width10mm Height10mm 270 Big carton drawing 180 120 Number 15*20=300 Figure 40: Big carton drawing Table 39: Big Carton size A7608SA-H_User Manual_V1.00 2022-08-26 Length10mm Width10mm Height10mm Number Smart Machine Smart Decision A7608SA-H_User Manual_V1.00 2022-08-26 380 280 280 300*4=1200 Smart Machine Smart Decision Appendix A. Reference Design Refer to < SIM7600 Reference Design V1.X.pdf > for the details. 3 POWERKEY NETLIGHT 51 R106 10K R105 300R Network LED Status VBAT Power supply Main Antenna TVS LXES15AAA1-153 R102 0R NC C106 NC C107 82 57 58 60 Power supply VBAT C101 100uF C102 100uF C103 1uF R103 4.7K Turn on/off impulse R104 47K MAIN_ANT GND GND GND VBAT VBAT 62 63 61 GND 64 GND Reset impulse UART_TXD UART_RXD UART_CTS UART_RTS UART_RI UART_DCD UART_DTR SIM_DATA SIM_CLK SIM_RST SIM_VDD C109 220nF VDD_EXT LDO Output:1.75-3.05V 4 71 68 67 66 69 70 72 17 19 18 20 TVS ESDA6V1W5 23 24 RESET TXD RXD CTS RTS RI DCD DTR USIM_DATA USIM_CLK USIM_RST USIM_VDD SD_DATA1 SD_DATA2 26 SD_CLK 25 22 SD_DATA3 SD_DATA0 21 SD_CMD 44 VDD_EXT 49 STATUS 52 GPIO41 53 USIM_DET 50 GPIO43 48 SD1_DET 1 2 5 10 14 37 40 43 65 81 GND GND GND GND GND GND GND GND GND GND 83 COEX1 84 COEX2 86 COEX3 GNSS Antenna GNSS_ANT 79 GND GND GND AUX_ANT GND 77 78 80 59 41 C108 33pF L101 NC L102 NC Div Antenna R101 0R C104 NC C105 NC R107 10K RF ON/OFF USB_VBUS USB_DN USB_DP If USB interface is used Connect USB_VBUS to 3.0V-5.25V SIM7600E FLIGHTMODE 54 11 12 13 27 28 30 31 32 33 34 35 USB_VBUS USB_DN USB_DP SDIO_DATA1 SDIO_DATA2 SDIO_CMD 29 SDIO_DATA0 SDIO_DATA3 SDIO_CLK GPIO3 GPIO6 HSIC_STROBE HSIC_DATA 36 GPIO77 87 74 PCM_IN PCM_SYNC 75 PCM_OUT 73 PCM_CLK 76 Audio CODEC Chip or DSP 6 7 SPI_CLK SPI_MISO 8 SPI_MOSI 9 SPI_CS ISINK 45 55 SCL SDA 56 47 ADC1 46 38 39 ADC2 VBAT VBAT VDD_1V8 15 USB_ID 16 42 NC LCD Display I2C_SCL I2C_SDA ADC Input range:0.1~1.7V VBAT Power supply C111 100uF C112 100uF C113 100nF BOOT_CFG0 85 Test Points A7608SA-H_User Manual_V1.00 2022-08-26 Figure 41: Reference design Smart Machine Smart Decision B. Coding Schemes and Maximum Net Data Rates over Air Interface Table 40: Coding Schemes and Maximum Net Data Rates over Air Interface Multislot definition(GPRS/EDGE) Slot class DL slot number UL slot number Active slot number 1 2 3 4 5 6 7 8 9 10 11 12 1 2 2 3 2 3 3 4 3 4 4 4 1 1 2 1 2 2 3 1 2 2 3 4 2 3 3 4 4 4 4 5 5 5 5 5 GPRS coding scheme Max data rata4 slots Modulation type CS 1 = 9.05 kb/s / time slot CS 2 = 13.4 kb/s / time slot CS 3 = 15.6 kb/s / time slot CS 4 = 21.4 kb/s / time slot 36.2 kb/s 53.6 kb/s 62.4 kb/s 85.6 kb/s GMSK GMSK GMSK GMSK EDGE coding scheme Max data rata4 slots Modulation type MCS 1 = 8.8 kb/s/ time slot MCS 2 = 11.2 kb/s/ time slot MCS 3 = 14.8 kb/s/ time slot MCS 4 = 17.6 kb/s/ time slot MCS 5 = 22.4 kb/s/ time slot MCS 6 = 29.6 kb/s/ time slot MCS 7 = 44.8 kb/s/ time slot MCS 8 = 54.4 kb/s/ time slot MCS 9 = 59.2 kb/s/ time slot 35.2 kb/s 44.8 kb/s 59.2 kb/s 70.4 kb/s 89.6 kb/s 118.4 kb/s 179.2 kb/s 217.6 kb/s 236.8 kb/s GMSK GMSK GMSK GMSK 8PSK 8PSK 8PSK 8PSK 8PSK HSDPA device category Max data ratepeak Modulation type Category 1 Category 2 Category 3 Category 4 1.2Mbps 1.2Mbps 1.8Mbps 1.8Mbps 16QAM,QPSK 16QAM,QPSK 16QAM,QPSK 16QAM,QPSK A7608SA-H_User Manual_V1.00 2022-08-26 Category 5 Category 6 Category 7 Category 8 Category 9 Category 10 Category 11 Category 12 Category 13 Category 14 Category 15 Category 16 Category 17 Category 18 Category 19 Category 20 Category 21 Category 22 Category 23 Category 24 3.6Mbps 3.6Mbps 7.2Mbps 7.2Mbps 10.2Mbps 14.4Mbps 0.9Mbps 1.8Mbps 17.6Mbps 21.1Mbps 23.4Mbps 28Mbps 23.4Mbps 28Mbps 35.5Mbps 42Mbps 23.4Mbps 28Mbps 35.5Mbps 42.2Mbps Smart Machine Smart Decision 16QAM,QPSK 16QAM,QPSK 16QAM,QPSK 16QAM,QPSK 16QAM,QPSK 16QAM,QPSK QPSK QPSK 64QAM 64QAM 16QAM 16QAM 64QAM 64QAM 64QAM 64QAM 16QAM 16QAM 64QAM 64QAM HSUPA device category Max data ratepeak Modulation type Category 1 Category 2 Category 3 Category 4 Category 5 Category 6 LTE-FDD device category

(Downlink) Category 1 Category 2 Category 3 Category 4 0.96Mbps 1.92Mbps 1.92Mbps 3.84Mbps 3.84Mbps 5.76Mbps QPSK QPSK QPSK QPSK QPSK QPSK Max data ratepeak Modulation type 10Mbps 50Mbps 100Mbps 150Mbps QPSK/16QAM/64QA M QPSK/16QAM/64QA M QPSK/16QAM/64QA M QPSK/16QAM/64QA M LTE-FDD device category

(Uplink) Category 1 A7608SA-H_User Manual_V1.00 Max data ratepeak Modulation type 5Mbps QPSK/16QAM 2022-08-26 Category 2 Category 3 Category 4 25Mbps 50Mbps 50Mbps Smart Machine Smart Decision QPSK/16QAM QPSK/16QAM QPSK/16QAM A7608SA-H_User Manual_V1.00 2022-08-26 C. Related Documents Table 41: Related Documents NO.

[1]

[2]

[3]

[4]

Title SIM7500_SIM7600 Series_AT Command Manual_V1.xx ITU-T Draft new recommendationV.25ter GSM 07.07 GSM 07.10

[5]

GSM 07.05

[6]

GSM 11.14

[7]

GSM 11.11

[8]

GSM 03.38

[9]

GSM 11.10

[10]

3GPP TS 51.010-1

[11]

3GPP TS 34.124

[12]

3GPP TS 34.121

[13]

3GPP TS 34.123-1

[14]

3GPP TS 34.123-3

[15]

EN 301 908-02 V2.2.1

[16]

EN 301 489-24 V1.2.1 Smart Machine Smart Decision Description AT Command Manual Serial asynchronous automatic dialing and control telecommunications the SIM Application Toolkit Digital cellular telecommunications (Phase 2+); AT command set for GSM Mobile Equipment (ME) Support GSM 07.10 multiplexing protocol Digital cellular telecommunications (Phase 2+); Use of Data Terminal Equipment Data Circuit terminating Equipment

(DTE DCE) interface for Short Message Service (SMS) and Cell Broadcast Service (CBS) system (Phase 2+);

Digital cellular Specification of the Subscriber Identity Module Mobile Equipment (SIM ME) interface Digital cellular telecommunications system (Phase 2+);

Specification of the Subscriber Identity Module Mobile Equipment (SIM ME) interface Digital cellular telecommunications system (Phase 2+);

Alphabets and language-specific information Digital cellular telecommunications system (Phase 2) Mobile Station (MS) conformance specification Part 1:

Conformance specification for Digital cellular telecommunications system (Release 5);

Mobile Station (MS) conformance specification Electromagnetic Compatibility (EMC) for mobile terminals and ancillary equipment. Electromagnetic Compatibility (EMC) for mobile terminals and ancillary equipment. Technical Specification Group Radio Access Network;

Terminal conformance specification; Radio transmission and reception (FDD) User Equipment (UE) conformance specification; Part 3:

Abstract Test Suites. Electromagnetic compatibility and Radio spectrum Matters

(ERM); Base Stations (BS) and User Equipment (UE) for IMT-2000. Third Generation cellular networks; Part 2:

Harmonized EN for IMT-2000, CDMA Direct Spread

(UTRA FDD) (UE) covering essential requirements of article 3.2 of the R&TTE Directive Electromagnetic compatibility and Radio Spectrum Matters

(ERM); Electromagnetic Compatibility (EMC) standard for radio equipment and services; Part 24: Specific conditions for IMT-2000 CDMA Direct Spread (UTRA) for Mobile and A7608SA-H_User Manual_V1.00 2022-08-26 portable (UE) radio and ancillary equipment Smart Machine Smart Decision

[17]

IEC/EN60950-1(2001) Safety of information technology equipment (2000)

[18]

3GPP TS 51.010-1 Digital cellular telecommunications system (Release 5);

Mobile Station (MS) conformance specification

[19]

GCF-CC V3.23.1 Global Certification Forum - Certification Criteria

[20]

2002/95/EC Directive of the European Parliament and of the Council of 27 January 2003 on the restriction of the use of certain hazardous substances in electrical and electronic equipment

(RoHS)

[21] Module Module secondary SMT Guidelines

[22]

[23]

[24]

[25]

[26]

secondary-SMT-UGD-V1.xx SIM7X00 Series_UART_Application Note_V1.xx SIM7100_SIM7500_SIM7600 Series_USB AUDIO_Application Note_V1.xx SIM7X00 Series_GPS_Application Note_V1.xx Antenna design guidelines for diversity receiver system SIM7100_SIM7500_SIM7600 _Sleep Mode_Application Note_V1.xx This document describes how to use UART interface of SIMCom modules. USB AUDIO Application Note GPS Application Note Antenna design guidelines for diversity receiver system Sleep Mode Application Note A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision D. Terms and Abbreviations Table 42: Terms and Abbreviations Abbreviation ADC ARP BER BTS CS CSD CTS DAC DRX DSP DTE DTR DTX EFR EGSM EMC ESD ETS EVDO FCC FD FDMA FR GMSK GNSS GPRS GPS GSM HR HSPA I2C IMEI LTE MO MS MT NMEA PAP PBCCH PCB PCS Description Analog-to-Digital Converter Antenna Reference Point Bit Error Rate Base Transceiver Station Coding Scheme Circuit Switched Data Clear to Send Digital-to-Analog Converter Discontinuous Reception Digital Signal Processor Data Terminal Equipment (typically computer, terminal, printer) Data Terminal Ready Discontinuous Transmission Enhanced Full Rate Enhanced GSM Electromagnetic Compatibility Electrostatic Discharge European Telecommunication Standard Evolution Data Only Federal Communications Commission (U.S.) SIM fix dialing phonebook Frequency Division Multiple Access Full Rate Gaussian Minimum Shift Keying Global Navigation Satellite System General Packet Radio Service Global Positioning System Global Standard for Mobile Communications Half Rate High Speed Packet Access Inter-Integrated Circuit International Mobile Equipment Identity Long Term Evolution Mobile Originated Mobile Station (GSM engine), also referred to as TE Mobile Terminated National Marine Electronics Association Password Authentication Protocol Packet Switched Broadcast Control Channel Printed Circuit Board Personal Communication System, also referred to as GSM 1900 A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision RF RMS RTC SIM SMS SPI SMPS TDMA TE TX UART VSWR SM NC EDGE HSDPA HSUPA ZIF WCDMA VCTCXO USIM UMTS UART Radio Frequency Root Mean Square (value) Real Time Clock Subscriber Identification Module Short Message Service serial peripheral interface Switched-mode power supply Time Division Multiple Access Terminal Equipment, also referred to as DTE Transmit Direction Universal Asynchronous Receiver & Transmitter Voltage Standing Wave Ratio SIM phonebook Not connect Enhanced data rates for GSM evolution High Speed Downlink Packet Access High Speed Uplink Packet Access Zero intermediate frequency Wideband Code Division Multiple Access Voltage control temperature-compensated crystal oscillator Universal subscriber identity module Universal mobile telecommunications system Universal asynchronous receiver transmitter A7608SA-H_User Manual_V1.00 2022-08-26 Smart Machine Smart Decision E. Safety Caution Table 43: Safety Caution Marks Requirements When in a hospital or other health care facility, observe the restrictions about the use of mobiles. Switch the cellular terminal or mobile off, medical equipment may be sensitive and not operate normally due to RF energy interference. Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it is switched off. The operation of wireless appliances in an aircraft is forbidden to prevent interference with communication systems. Forgetting to think much of these instructions may impact the flight safety, or offend local legal action, or both. Do not operate the cellular terminal or mobile in the presence of flammable gases or fumes. Switch off the cellular terminal when you are near petrol stations, fuel depots, chemical plants or where blasting operations are in progress. Operation of any electrical equipment in potentially explosive atmospheres can constitute a safety hazard. Your cellular terminal or mobile receives and transmits radio frequency energy while switched on. RF interference can occur if it is used close to TV sets, radios, computers or other electric equipment. Road safety comes first! Do not use a hand-held cellular terminal or mobile when driving a vehicle, unless it is securely mounted in a holder for hands free operation. Before making a call with a hand-held terminal or mobile, park the vehicle. GSM cellular terminals or mobiles operate over radio frequency signals and cellular networks and cannot be guaranteed to connect in all conditions, especially with a mobile fee or an invalid SIM card. While you are in this condition and need emergent help, please remember to use emergency calls. In order to make or receive calls, the cellular terminal or mobile must be switched on and in a service area with adequate cellular signal strength. Some networks do not allow for emergency call if certain network services or phone features are in use (e.g. lock functions, fixed dialing etc.). You may have to deactivate those features before you can make an emergency call. Also, some networks require that a valid SIM card be properly inserted in the cellular terminal or mobile. Contact us:

Shanghai SIMCom Wireless Solutions Ltd. Add: SIM Technology Building B, No.633, Jinzhong Road, Changning District, Shanghai P.R. China 200335 Tel+86 21 3157 5200\3157 5100 Email: simcom@simcom.com URLwww.simcom.com A7608SA-H_User Manual_V1.00 2022-08-26

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LTE /HSPA/GSM/GNSS MODULE Model number: A7608SA-H, A7608SA-H miniPCIE A7608SA-H and A7608SA-H miniPCIE are both LTE

/HSPA/GSM/GNSS MODULE

. They have the same software version and hardware design, including chipset, circuits, PCB and components. A7608SA-H miniPCIE is the main test. A7608SA-H miniPCIE is combined with a A7608SA-H module and a PCIE adapter board. The adapter board switches A7608SA-H module to follow PCIE Express Mini Card 1.8 standard connector protocol. No any other internal changes in A7608SA-H miniPCIE module. and the difference wont affect the RF. Following details are the difference between two modules. Interface Only Module, LCC+LGA package PCI Express Mini Card 1.8 standard connector Module A7608SA-

H A7608SA-

H miniPCIE Frequency bands GSM: 850/1900 WCDMA: B2/B5 LTE-FDD:B2/B4/B5 /B66 LTE-TDD: B41 GSM: 850/1900 WCDMA: B2/B5 LTE-FDD:B2/B4/B5 /B66 LTE-TDD: B41 SIMCom Wireless Solutions Limited Date:2022-10-19 Signature:

SIMCom Wireless Solutions Limited Sample Request for Confidentiality Letter-FCC Date 2022-8-15 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, Maryland 21046 Re: Request forconfidentiality FCC ID:2AJYU-8BAE006 To whom it may concern, We hereby respectfully request that under the provision of 47 CFR 0.459 and 0.457(d) the documents listed below and attached with this application for certification be provided with confidential status. Schematics.pdf Operational Description.pdf Frequency Block Diagrams.pdf BOM.pdf Tune up.pdf Any exhibit / information for which we have requested confidentiality, but which may not be accorded such treatment by the FCC, should be returned to us. The documents listed above contain trade secrets that are treated as confidential by us. Substantial competitive harm to us could result should they be made available to the public. Sincerely, Name Job TitleDirector

SIMCom Wireless Solutions Limited Sample Modular Approval Letter 2022-9-2 Dear Application Examiner:

[SIMCom Wireless Solutions Limited, A7608SA-H /A7608SA-H miniPCIE2AJYU-8BAE001] is seeking modular approval. The radio meets the requirements for modular approval as detailed in FCC 15.212. Compliance to each of the requirements is described below:

1. 2. 3. 4. 5. 6. 7. 8. The modular transmitter must have its own RF shielding. The radio portion of the module is contained in its own RF shielding. The shielding is installed at the factory. Please see the Internal Photos exhibit. The modular transmitter must have buffered modulation/data inputs. The EUThas buffered data inputs to insure compliance with Part 15 requirements under conditions of excessive data rates or over-modulation. Please see the Schematicsexhibit. The modular transmitter must have its own power supply regulation. The EUT has its own power supply regulation to insure compliance with Part 15 requirements regardless of the quality or level of external DC supplying the module from the host unit. Please see Schematics exhibit. The modular transmitter must comply with the antenna requirements of Section 15.203 and 15.204(c). Licensed products are not applicable The modular transmitter must be tested in a stand-alone configuration. The EUTwas tested in a stand-alone configuration. Please see test setup photos exhibit and technical report exhibit. The modular transmitter must be labeled with its own FCC ID number. The EUT is labeled with its own FCC ID number. Please see FCC ID label & location exhibit. The modular transmitter must comply with any specific rule or operatingrequirements applicable to the transmitter and the manufacturer must provide adequate instructions The EUT is compliant with all along with the module to explain anysuch requirements. applicable FCC rules. Detail instructions for maintaining compliance are given in the User Manual. The modular transmitter must comply with any applicable RF exposure requirements. The EUT is compliant with all applicable RF exposure requirements. Please see RF Exposure Exhibit. Please contact me if you have additional questions. Your attention to this matter is greatly appreciated. Best regards,

Yongsheng Li and Director]