FCC ID: 2AJYU-8PYA00A Wireless Module

SIM7500A Hardware Design LTE Module SIMCom Wireless Solutions Limited Building B, SIM Technology Building, No.633, Jinzhong Road Changning District, Shanghai P.R.China Tel: 86-21-31575100 support@simcom.com www.simcom.com SIM7500A Hardware Design_V1.09 Document Title:

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SIM7500A Hardware Design V1.09 2020-08-24 Released GENERAL NOTES SIMCOM OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS, TO SUPPORT APPLICATION AND ENGINEERING EFFORTS THAT USE THE PRODUCTS DESIGNED BY SIMCOM. THE INFORMATION PROVIDED IS BASED UPON REQUIREMENTS SPECIFICALLY PROVIDED TO SIMCOM BY THE CUSTOMERS. SIMCOM HAS NOT UNDERTAKEN ANY INDEPENDENT SEARCH FOR ADDITIONAL RELEVANT INFORMATION, INCLUDING ANY INFORMATION THAT MAY BE IN THE CUSTOMERS POSSESSION. FURTHERMORE, SYSTEM VALIDATION OF THIS 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. COPYRIGHT THIS DOCUMENT CONTAINS PROPRIETARY TECHNICAL INFORMATION WHICH IS THE PROPERTY OF SIMCOM WIRELESS SOLUTIONS LIMITED COPYING, TO OTHERS AND USING THIS DOCUMENT, ARE FORBIDDEN WITHOUT EXPRESS AUTHORITY BY SIMCOM. OFFENDERS ARE LIABLE TO THE PAYMENT OF INDEMNIFICATIONS. ALL RIGHTS RESERVED BY SIMCOM IN THE PROPRIETARY TECHNICAL INFORMATION INCLUDING BUT NOT LIMITED TO REGISTRATION GRANTING OF A PATENT , A UTILITY MODEL OR DESIGN. ALL SPECIFICATION SUPPLIED HEREIN ARE SUBJECT TO CHANGE WITHOUT NOTICE AT ANY TIME. SIMCom Wireless Solutions Limited Building B, SIM Technology Building, No.633 Jinzhong Road, Changning District, Shanghai P.R.China Tel: +86 21 31575100 Email: simcom@simcom.com For more information, please visit:

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https://www.simcom.com/ask/or email to: support@simcom.com Copyright 2020 SIMCom Wireless Solutions Limited All Rights Reserved. www.simcom.com 2/56 SIM7500A Hardware Design_V1.09 Version History Date Version Description of change 2016-07-06 1.00 Original 2016-11-01 1.01 Modify Document name Add SIM7500JC/SIM7500V/SIM7500SA/SIM7500E project Modify GPIO_49 to FlightMode Modify VBUS Minimum Voltage from 3.6V to 3.0V Modify figure 18, figure 23 and figure 39. Modify Table 8, table 9 figure 18 and figure 23. Modify figure 8figure 11. Add SIM Card reference circuit with hot plug in 2017-01-03 1.02 2017-03-23 1.03 Modify Table 1. 2017-05-25 1.04 Modify Table 1,Table 22,Table 24,Table 33 2017-06-26 1.05 Modify Table 2 2017-12-8 1.06 2018-7-12 1.07 2020-3-17 1.08 2020-08-24 1.09 Add SIM7500V, delete SIM7500S. Modify Table 1, Table 22, Table 23, Table 25Table 34 Modify Table 1 Change the document name Update document template Update some parameters Others Correct the sleep current consumption on WCDMA And LTE. Author Yuan Shijie Tenglili Shengwu.sun Shijie.yuan LiLi.teng Shengwu.sun Shijie.yuan Shengwu.sun Shijie.yuan Fan.gao Shijie.yuan Shijie.yuan Fan.Gao Shijie.yuan Shijie.yuan Xutao.Jiang Honggang.Ma www.simcom.com 3/56 SIM7500A Hardware Design_V1.09 Contents Version History .................................................................................................................................. 3 Contents ............................................................................................................................................ 4 Table Index ........................................................................................................................................ 6 Figure Index ....................................................................................................................................... 7 Introduction .................................................................................................................................... 8 1.1 Product Outline ................................................................................................................................... 8 1.2 Hardware Interface Overview ............................................................................................................. 9 1.3 Hardware Block Diagram ................................................................................................................... 9 1.4 Functional Overview ......................................................................................................................... 10 Package Information .....................................................................................................................12 2.1 Pin Assignment Overview ................................................................................................................. 12 2.2 Pin Description ................................................................................................................................. 14 2.3 Mechanical Information .................................................................................................................... 16 2.4 Footprint Recommendation .............................................................................................................. 17 Interface Application .....................................................................................................................18 3.1 Power Supply ................................................................................................................................... 18 3.1.1 Power supply Design Guide ................................................................................................... 18 3.1.2 Recommended Power Supply Circuit .................................................................................... 19 3.1.3 Voltage Monitor ...................................................................................................................... 20 3.2 Power on/Power off/Reset Function ................................................................................................. 20 3.2.1 Power on ................................................................................................................................ 20 3.2.2 Power off ................................................................................................................................ 22 3.2.3 Reset Function ....................................................................................................................... 24 3.3 UART Interface ................................................................................................................................. 24 3.3.1 UART Design Guide ............................................................................................................... 25 3.3.2 RI and DTR Behavior ............................................................................................................. 26 3.4 USB Interface ................................................................................................................................... 27 3.5 SIM Interface .................................................................................................................................... 28 3.5.1 SIM Application Guide ............................................................................................................ 29 3.5.2 SIM Card Design Guide ......................................................................................................... 30 3.5.3 Recommended SIM Card Holder ........................................................................................... 30 3.6 PCM Interface ................................................................................................................................... 31 3.6.1 PCM Timing ............................................................................................................................ 31 3.6.2 PCM Application Guide .......................................................................................................... 33 3.7 I2C Interface ..................................................................................................................................... 33 3.8 Network Status ................................................................................................................................. 34 3.9 Operating Status Indication .............................................................................................................. 35 3.10 Flight Mode Control ........................................................................................................................ 35 www.simcom.com 4/56 SIM7500A Hardware Design_V1.09 3.11 Pin Multiplex Function..................................................................................................................... 36 3.12 Other interface ................................................................................................................................ 37 3.12.1 Sink Current Source ............................................................................................................. 37 3.12.2 ADC ...................................................................................................................................... 38 RF Specifications ..........................................................................................................................39 4.1 LTE RF Specifications ...................................................................................................................... 39 4.2 LTE Antenna Design Guide .............................................................................................................. 39 4.3 GNSS ................................................................................................................................................ 42 4.3.1 GNSS Technical specification ................................................................................................ 42 4.3.2 GNSS Application Guide ........................................................................................................ 42 Electrical Specifications ...............................................................................................................45 5.1 Absolute Maximum Ratings .............................................................................................................. 45 5.2 Operating Conditions ........................................................................................................................ 45 5.3 Operating Mode ................................................................................................................................ 46 5.3.1 Operating Mode Definition ..................................................................................................... 46 5.3.2 Sleep mode ............................................................................................................................ 47 5.3.3 Minimum functionality mode and Flight Mode ....................................................................... 47 5.4 Current Consumption ....................................................................................................................... 48 5.5 ESD Notes ........................................................................................................................................ 48 SMT Production Guide ..................................................................................................................49 6.1 Top and Bottom View of Module ....................................................................................................... 49 6.2 Label Information .............................................................................................................................. 50 6.3 Typical SMT Reflow Profile .............................................................................................................. 50 6.4 Moisture Sensitivity Level (MSL) ...................................................................................................... 51 6.5 Stencil Foil Design Recommendation .............................................................................................. 52 Packaging ......................................................................................................................................53 www.simcom.com 5/56 SIM7500A Hardware Design_V1.09 Table Index TABLE 1 : MODULE FREQUENCY BANDS (* STANDS FOR SIM7500) ............................................................ 8 TABLE 2 : GENERAL FEATURES ........................................................................................................................... 10 TABLE 3 : PIN DEFINITIONS ................................................................................................................................... 12 TABLE 4 : IO PARAMETERS DEFINITION ............................................................................................................ 14 TABLE 5 : PIN DESCRIPTION ................................................................................................................................. 14 TABLE 6 : VBAT PINS ELECTRONIC CHARACTERISTIC ................................................................................. 18 TABLE 7 : RECOMMENDED TVS LIST .................................................................................................................. 19 TABLE 8 : POWER ON TIMING AND ELECTRONIC CHARACTERISTIC ....................................................... 22 TABLE 9 : POWER OFF TIMING AND ELECTRONIC CHARACTERISTIC ..................................................... 23 TABLE 10 : RESET PIN ELECTRONIC CHARACTERISTIC .............................................................................. 24 TABLE 11 : SIM ELECTRONIC CHARACTERISTIC IN 1.8V MODE (SIM_VDD =1.8V) ................................ 28 TABLE 12 : SIM ELECTRONIC CHARACTERISTIC 3.0V MODE (SIM_VDD =2.95V) ................................... 28 TABLE 13 : AMPHENOL SIM SOCKET PIN DESCRIPTION ............................................................................... 30 TABLE 14 : PCM FORMAT ........................................................................................................................................ 31 TABLE 15 : PCM TIMING PARAMETERS .............................................................................................................. 32 TABLE 16 : NETLIGHT PIN STATUS ....................................................................................................................... 35 TABLE 17 : PIN DEFINITION OF THE STATUS .................................................................................................... 35 TABLE 18 : FLIGHTMODE PIN STATUS ................................................................................................................ 36 TABLE 19 : PIN MULTIPLEX FUNCTION LIST ..................................................................................................... 36 TABLE 20 : SINK CURRENT ELECTRONIC CHARACTERISTIC ...................................................................... 37 TABLE 21 : ADC ELECTRONIC CHARACTERISTICS ......................................................................................... 38 TABLE 22 : CONDUCTED TRANSMISSION POWER ......................................................................................... 39 TABLE 23 : OPERATING FREQUENCIES ............................................................................................................. 39 TABLE 24 : CONDUCTED RECEIVE SENSITIVITY ............................................................................................. 39 TABLE 25 : REFERENCE SENSITIVITY (QPSK) ................................................................................................. 39 TABLE 26 : RECOMMENDED PASSIVE ANTENNA CHARACTERISTICS ...................................................... 40 TABLE 27 : TRACE LOSS ......................................................................................................................................... 40 TABLE 28 : RECOMMENDED TVS ......................................................................................................................... 41 TABLE 29 : LNA REQUIREMENTS ......................................................................................................................... 43 TABLE 30 : ABSOLUTE MAXIMUM RATINGS ...................................................................................................... 45 TABLE 31 : RECOMMENDED OPERATING RATINGS ....................................................................................... 45 TABLE 32 : 1.8V DIGITAL I/O CHARACTERISTICS ............................................................................................. 45 TABLE 33 : OPERATING TEMPERATURE ............................................................................................................ 46 TABLE 34 : OPERATING MODE DEFINITIONS .................................................................................................... 46 TABLE 35 : CURRENT CONSUMPTION ON VBAT PINS (VBAT=3.8V) ........................................................... 48 TABLE 36 : THE ESD PERFORMANCE MEASUREMENT TABLE (TEMPERATURE: 25, HUMIDITY:

45%)...................................................................................................................................................................... 48 TABLE 37 : THE DESCRIPTION OF LABEL INFORMATION ............................................................................. 50 TABLE 38 : MOISTURE SENSITIVITY LEVEL AND FLOOR LIFE ..................................................................... 51 TABLE 39 : TRAY SIZE .............................................................................................................................................. 53 TABLE 40 : SMALL CARTON SIZE .......................................................................................................................... 54 TABLE 41 : BIG CARTON SIZE ................................................................................................................................ 55 www.simcom.com 6/56 SIM7500A Hardware Design_V1.09 Figure Index FIGURE 1 : SIM7500A BLOCK DIAGRAM .............................................................................................................. 10 FIGURE 2 : PIN ASSIGNMENT OVERVIEW ............................................................................................................ 12 FIGURE 3 : DIMENSIONS (UNIT: MM) .................................................................................................................... 16 FIGURE 4 : FOOTPRINT RECOMMENDATION (UNIT: MM) ................................................................................ 17 FIGURE 5 : POWER SUPPLY APPLICATION CIRCUIT .......................................................................................... 19 FIGURE 6 : LINEAR REGULATOR REFERENCE CIRCUIT .................................................................................. 19 FIGURE 7 : SWITCHING MODE POWER SUPPLY REFERENCE CIRCUIT ........................................................ 20 FIGURE 8 : REFERENCE POWER ON/OFF CIRCUIT ............................................................................................. 21 FIGURE 9 : POWER ON TIMING SEQUENCE ......................................................................................................... 21 FIGURE 10 : POWER OFF TIMING SEQUENCE ..................................................................................................... 23 FIGURE 11 : REFERENCE RESET CIRCUIT ............................................................................................................ 24 FIGURE 12 : UART FULL MODEM ........................................................................................................................... 25 FIGURE 13 : UART NULL MODEM .......................................................................................................................... 25 FIGURE 14 : REFERENCE CIRCUIT OF LEVEL SHIFT ......................................................................................... 26 FIGURE 15 : RI BEHAVIOURSMS AND URC REPORT .................................................................................. 26 FIGURE 16 : RI BEHAVIOURVOICE CALL ..................................................................................................... 27 FIGURE 17 : USB REFERENCE CIRCUIT ................................................................................................................ 27 FIGURE 18 : REFERENCE CIRCUIT OF THE 8-PIN SIM CARD HOLDER .......................................................... 29 FIGURE 19 : SIM INTERFACE REFERENCE CIRCUIT .......................................................................................... 29 FIGURE 20 : AMPHENOL SIM CARD SOCKET ...................................................................................................... 30 FIGURE 21 : PCM_SYNC TIMING ............................................................................................................................ 31 FIGURE 22 : EXT CODEC TO MODULE TIMING ................................................................................................... 32 FIGURE 23 : MODULE TO EXT CODEC TIMING ................................................................................................... 32 FIGURE 24 : AUDIO CODEC REFERENCE CIRCUIT ............................................................................................. 33 FIGURE 25 : I2C REFERENCE CIRCUIT .................................................................................................................. 34 FIGURE 26 : NETLIGHT REFERENCE CIRCUIT .................................................................................................... 34 FIGURE 27 : FLIGHT MODE SWITCH REFERENCE CIRCUIT ............................................................................. 36 FIGURE 28 : ISINK REFERENCE CIRCUIT ............................................................................................................. 37 FIGURE 29 : ANTENNA MATCHING CIRCUIT (MAIN_ANT) .............................................................................. 40 FIGURE 30 : ANTENNA MATCHING CIRCUIT (DIV_ANT) .................................................................................. 41 FIGURE 31 : ACTIVE ANTENNA CIRCUIT ............................................................................................................. 43 FIGURE 32 : PASSIVE ANTENNA CIRCUIT (DEFAULT) ....................................................................................... 43 FIGURE 33 : TOP AND BOTTOM VIEW OF MODULE ........................................................................................... 49 FIGURE 34 : LABEL INFORMATION ....................................................................................................................... 50 FIGURE 35 : THE RAMP-SOAK-SPIKE REFLOW PROFILE OF MODULE ......................................................... 51 FIGURE 36 : PACKAGING INTRODUCE ................................................................................................................. 53 FIGURE 37 : TRAY DRAWING .................................................................................................................................. 53 FIGURE 38 : SMALL CARTON DRAWING INTRODUCE ...................................................................................... 54 FIGURE 39 : BIG CARTON DRAWING INTRODUCE ............................................................................................. 55 www.simcom.com 7/56 SIM7500A Hardware Design_V1.09 Introduction This document describes the electronic specifications, RF specifications, interfaces, mechanical characteristics and testing results of the SIMCom SIM7500A. With the help of this document and other software application notes/user guides, users can understand and use modules to design and develop applications quickly. 1.1 Product Outline The SIM7500A support many air-interface standards, refer to the following table. Table 1: Module frequency bands (* stands for SIM7500) Standard Frequency SIM7500A GSM WCDMA LTE 850MHz 900MHz 1800M Hz 1900M Hz B1 B2 B5 B8 FDD B1 FDD B2 FDD B3 FDD B4 FDD B5 FDD B7 FDD B8 FDD B12 FDD B13 FDD B18 FDD B19 FDD B20 FDD B26 FDD B28 Category GNSS CAT1 www.simcom.com 8/56 SIM7500A Hardware Design_V1.09 With a small physical dimension of 24*27*2.75 mm and with the functions integrated, the Module can meet almost any space requirement in users applications, such as smart phones, PDAs, industrial handhelds, machine-to-machine, vehicle applications, etc. NOTE CAT1 or CAT4 correspond to different PN numbers. 1.2 Hardware Interface Overview The interfaces are described in detail in the next chapters include:

Power Supply USB Interface UART Interface SIM Interface GPIO ADC Power Output Current Sink Source PCM Interface I2C Interface 1.3 Hardware Block Diagram The block diagram of the Module is shown in the figure below. www.simcom.com 9/56 SIM7500A Hardware Design_V1.09 Figure 1: SIM7500A Block Diagram 1.4 Functional Overview Table 2: General features Feature Power supply Power saving Implementation Single supply voltage 3.44.2V Current in sleep mode : <5mA Radio frequency bands Please refer to the table 1 Transmitting power LTE: Class 3 (23dBm) www.simcom.com 10/56 Figure1:SYSBlockDiagramTXRXLTEB21850~1910MHz1930~1990MHzB41710~1755MHz2110~2155MHZB12699~716MHz729~746MHz Data Transmission Throughput SIM7500A Hardware Design_V1.09 FDD-LTE CAT 110 Mbps (DL), 5 Mbps (UL) LTE main antenna LTE auxiliary antenna GNSS antenna GNSS engine (GPS,GLONASS , BD and QZSS GALILEO) Protocol: NMEA MT, MO, CB, Text and PDU mode SMS storage: SIM card or ME(default) Transmission of SMS alternatively over CS or PS. SIM interface Support identity card: 1.8V/ 3V SIM application toolkit Support SAT class 3, GSM 11.14 Release 98 Support USAT Phonebook management Support phonebook types: DC,MC,RC,SM,ME,FD,ON,LD,EN 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) 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. USB Firmware upgrade Physical characteristics Temperature range USB 2.0 specification-compliant as a peripheral Firmware upgrade over USB interface USB 2.0 specification-compliant as a peripheral Weight:4.0 g Size:24*27*2.75mm Normal operation temperature: 25C High temperature: 55C Low temperature -10C Module is able to make and receive voice calls, data calls, SMS and make WCDMA/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. Antenna GNSS SMS Audio feature UART interface NOTE www.simcom.com 11/56 SIM7500A Hardware Design_V1.09 Package Information 2.1 Pin Assignment Overview All functions of the SIM7500A will be provided through 56 pads that will be connected to the customers platform. The following Figure is a high-level view of the pin assignment of the SIM7500A. Figure 2: Pin assignment overview Table 3: Pin Definitions www.simcom.com 12/56 DBG_TXDDBG_TXDI2S_MCLKLTE_ACTIVESIM7500xTop ViewMAIN_ANTNETLIGHTSTATUS234567893616151413123938137GNDGNDGNDGND101140424143GND2827262524232221201918172930313233343556444546474849505152535455DIV_ANTSCLSDAGNDUSB_DMUSB_DPVBUSSIM_DATASIM_CLKSIM_DETSIM_RSTSIM_VDDGNDGNDPCM_CLKPCM_SYNCPCM_INPCM_OUTGNDL11_1V8RESETADCGPIO_1ISINKGNDPWRKEYGNDGNDVBATVBATGNDRTSDCDTXDRXDDTRCTSRIGNDGNDGPIO_37FlightModeGNDGNDGNSS_ANTGND Pin No. Pin name Pin No. Pin name SIM7500A Hardware Design_V1.09 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 50 52 54 56 48*

DIV_ANT SCL GND USB_DP SIM_DATA SIM_DET SIM_VDD GND PCM_CLK PCM_IN GND RESET GPIO_1 GND PWRKEY GND VBAT RTS TXD DTR RI GND GND GPIO_37 STATUS NETLIGHT GND GND GND GND SDA USB_DM VBUS SIM_CLK SIM_RST GND I2S_MCLK PCM_SYNC PCM_OUT L11_1V8 ADC ISINK GND GND VBAT GND DCD RXD CTS GND MAIN_ANT GND FlightMode DBG_TXD GND GNSS_ANT 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 NOTE Before the normal power up, pin48 cannot be pulled up. www.simcom.com 13/56 SIM7500A Hardware Design_V1.09 2.2 Pin Description Table 4: IO parameters definition Pin type Description 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 PI PO AI AIO I/O DI DO DOH DOL PU PD Table 5: Pin Description Pin name Pin No. Description Comment Default status Power supply VBAT 33,34 PI L11_1V8 23 PO GND Ground 1, 3, 6, 15,16,22,28, 29,31,32,35, 43,44,46,47, 53,54,56 System Control PWRKEY 30 DI,PU RESET 24 DI, PU Power supply, voltage range: 3.4 4.2V. 1.8V output with Max. 50ma current output for external circuit, such as level shift circuit. If unused, keep it open. System power on/off control input, active low. System reset control input, active low. Default 0.8V RESET has been pulled up to 1.8V via a resistor internally. SIM interface SIM_DATA SIM_RST 10 13 I/O,PU DO SIM Card data I/O, which has been pulled up via a 10KR resistor to SIM_VDD internally. SIM Reset All lines of SIM interface should be protected against www.simcom.com 14/56 SIM_CLK 11 SIM_VDD 14 USB VBUS USB_DM USB_DP UART interface RTS CTS RXD RI DCD TXD DTR SCL SDA I2C interface PCM interface PCM_OUT PCM_IN PCM_SYNC PCM_CLK I2S_MCLK GPIO NETLIGHT 52 STATUS GPIO_1 SIM_DET 12 GPIO_37 48 9 7 8 36 41 39 42 37 38 40 4 5 21 20 19 18 17 50 26 49 SIM7500A Hardware Design_V1.09 SIM clock Power output for SIM card, its output Voltage depends on SIM card type automatically. Its output current is up to 50ma. ESD. 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. Request to send Clear to Send Receive Data Ring Indicator Carrier detects Transmit Data DI,PU DTE get ready If unused, keep them open. I2C clock output I2C data input/output If unused, keep them open. PCM data output. PCM data input. PCM data frame sync signal. PCM data bit clock. Audio Master clock LED control output as network status indication. Operating status output. High level: Power on and firmware ready Low level: Power off GPIO Flight Mode control input. High level(or open): Normal Mode Low level: Flight Mode Default: GPIO Optional: SIM card detecting input. H: SIM is removed L: SIM is inserted Boot configuration input. Module will be forced into USB down load mode by connect 23 pin to VDD_1V8 during power up. If unused, please keep them open. If unused, please keep them open. FlightMode Cant be used when Module is in sleep mode. DO PO DI,PD I/O I/O DOL DI,PU DI,PU DOH DOH DOH DO I/O DO DI DO DO DO DO DO IO IO IO FlightMode DI,PU www.simcom.com 15/56 SIM7500A Hardware Design_V1.09 RF interface MAIN _ANT DIV_ANT GNSS_ANT Other interface ISINK DGB_TXD ADC 45 2 55 27 51 25 AI AI AI DO AI AIO MAIN antenna soldering pad Auxiliary antenna soldering pad GNSS antenna soldering pad Ground-referenced current sink. Use for debug Analog-digital converter input If unused, please keep them open. 2.3 Mechanical Information The following figure shows the package outline drawing of Module. Figure 3: Dimensions (Unit: mm) www.simcom.com 16/56 2.4 Footprint Recommendation SIM7500A Hardware Design_V1.09 Figure 4: Footprint recommendation (Unit: mm) www.simcom.com 17/56 SIM7500A Hardware Design_V1.09 Interface Application 3.1 Power Supply On VBAT pads, a ripple current up to 2A typically, may cause voltage drop. Therefore, 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 of more than 300mV. Table 6: VBAT Pins electronic characteristic Symbol VBAT IVBAT(peak) Parameter Module power voltage Module power peak current in normal mode. 1.0

2 A IVBAT(average) Module power average current in normal mode IVBAT(sleep) Power supply current in sleep mode Please refer to the table 34 IVBAT(power-off) Module power current in power off mode.

20 uA Min 3.4 Type Max Unit 4.2 3.8 V 3.1.1 Power supply Design Guide Make sure that the voltage on the VBAT pins will never drop below 3.4V. NOTE If the power supply for BAT pins can support up to 2A, using a total of more than 220uF capacitors is recommended, or else users must use a total of 1000uF capacitors, in order to avoid the voltage drop of 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, user should keep VBAT trace on the circuit board wider than 2 mm to minimize PCB trace impedance. The following figure shows the recommended circuit. www.simcom.com 18/56 SIM7500A Hardware Design_V1.09 Figure 5: Power supply application circuit In addition, in order to guard for ESD or surge protection, it is suggested to use a TVS to protect the module. Table 7: Recommended TVS list No Manufacturer Part Number Reverse Stand-Off Voltage Package Js-ele Prisem Way-on ESDBW5V0A1 5V PESDHC2FD4V5BH 4.5V WS05DPF-B Will semi ESD5611N Will semi ESD56151W05 Way-on WS4.5DPV 4.5V 5V 5V 5V DFN1006-2L DFN1006-2L DFN1006-2L DFN1006-2L SOD-323 DFN1610-2L 1 2 3 4 5 6 3.1.2 Recommended Power Supply Circuit It is recommended that a switching mode power supply or 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 6: 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. www.simcom.com 19/56 VBATVBAT34333231GNDGNDMODULEC101FB101TVS220uFVBAT33pFC102VinVoutGNDFB3+PWR_CTRLR102R101VBAT100K47K+C103330uFC104100nFU101MIC293025412C101C102100uF1uFDC INPUTR103470ROn/OffFUSE SIM7500A Hardware Design_V1.09 Figure 7: 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 Module, when the VBAT voltage is out of a range, the AT command AT+CPMVT can be used to enable under-voltage power-off function. 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]. NOTE 3.2 Power on/Power off/Reset Function 3.2.1 Power on Module 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. www.simcom.com 20/56 FUSEVinVoutFBU10112345LM2596-ADJ+100uHMBR360L101C101+C102D102C103R102R101FB101330uFVBAT2.2K1K100uF1uFC104100nF270 ohm@100Mhz DC INPUTPWR_CTRLGNDOn/Off SIM7500A Hardware Design_V1.09 Figure 8: Reference Power on/off Circuit 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. Figure 9: Power on timing sequence www.simcom.com 21/56 NOTE 4.7K47KTurn on / off impulsePWRKEYPower On / off logic1.8VMODULE0100nFThe high voltage of PWRKEY is 0.8VSTATUS(Output)TonVBATPWRKEY(Input)Ton(status)UART PortUndefinedActiveTon(uart)UndefinedActiveUSB PortTon(usb)Ton(L11_1V8)L11_1V8 SIM7500A Hardware Design_V1.09 Ton Ton(status) Ton(uart) Ton(usb) VIH VIL NOTE Table 8: Power on timing and Electronic Characteristic Symbol Parameter Min Type Max Unit The time of active low level impulse of PWRKEY pin to power on module 100 500 The time from power-on issue to STATUS pin output high level(indicating power up ready ) 12 Ton(L11_1V8) The time from power-on issue to L11_1V8 ready 100 The time from power-on issue to UART port ready 11 The time from power-on issue to USB port ready 11 Input high level voltage on PWRKEY pin Input low level voltage on PWRKEY pin 0.6

-0.3

1.8 0.5 ms ms s s s V V 13

12 12 0.8 0 3.2.2 Power off The following methods can be used to power off Module. Method 1: Power off Module by pulling the PWRKEY pin down to ground. Method 2: Power off Module 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. 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, Module 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 modules are powered off completely. The power off scenario by pulling down the PWRKEY pin is illustrated in the following figure. www.simcom.com 22/56 SIM7500A Hardware Design_V1.09 Figure 10: Power off timing sequence Table 9: Power off timing and Electronic Characteristic Symbol Parameter Toff The active low level time pulse on PWRKEY pin to power off module Toff(status) The time from power-off issue to STATUS pin output low level(indicating power off )*

Toff(L11_1V8) The time from power-off issue to L11_1V8 Toff(uart) The time from power-off issue to UART port off Toff(usb) The time from power-off issue to USB port off Toff-on The buffer time from power-off issue to power-on issue Time value Min Type Max Unit 2.5

5.0 25 20 14 27 0 26

15 28

s s s s s s 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. It is suggested that the host can cut off the power off the module, when the module could not switch off by PWRKEY of RESET interface, customer could cut off the power to restart the module. If the PWERKY and RESET key works normally, it is not suggested to switch off module by remove the power supply for that might damage the flash. The power off time may vary for the local net status. www.simcom.com 23/56

(Output)Toff(Input)Toff(status)UART PortUndefinedActiveToff(uart)TonToff-onUSB PortUndefinedActiveToff(usb)PWRKEYSTATUSL11_1V8Toff(L11_1V8) SIM7500A Hardware Design_V1.09 3.2.3 Reset Function Module 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 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. Table 10: RESET pin electronic characteristic Figure 11: Reference reset circuit Symbol Parameter Min Type Max Unit The active low level time impulse on RESET pin to reset module 100 Input high level voltage Input low level voltage 1.17

-0.3 1.8 0 2.1 0.8 ms V V Treset VIH VIL 3.3 UART Interface Module 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. www.simcom.com 24/56 4.7K47KReset ImpulseRESETReset Logic40K1.8VMODULE100nFTreset SIM7500A Hardware Design_V1.09 3.3.1 UART Design Guide The following figures show the reference design. Figure 12: UART Full modem Figure 13: UART Null modem The Module UART is 1.8V voltage interface. If users UART application circuit is a 3.3V voltage interface, the level shifter circuits should be used for voltage matching. The TXB0108RGYR provided by Texas Instruments is recommended. The following figure shows the voltage matching reference design. www.simcom.com 25/56 TXDRXDRTSCTSDTRDCDRITXDRXDRTSCTSDTRDCDRINGMODULE (DCE)HOST(DTE)UARTUARTMODULE (DCE)HOST(DTE)UARTUARTTXDRXDRTSCTSDTRDCDRITXDRXDRTSCTSDTRDCDRINGInterruptWake up host SIM7500A Hardware Design_V1.09 Figure 14: Reference circuit of level shift To comply with RS-232-C protocol, the RS-232-C level shifter chip should be used to connect Module to the RS-232-C interface, for example SP3238ECA, etc. NOTE Module 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 stay at high level until certain conditions such as receiving SMS, or a URC report come in. It will then change to low level. It will stay low until the host controller clears the interrupted event with AT+CRIRS AT command. Figure 15: RI behaviourSMS and URC report www.simcom.com 26/56 TXDRXDRTSCTSDTRDCDRIA7A1A2A3A4A5A6MODULEUART portA8B7B1B2B3B4B5B6B8VCCAOEL11_1V8 or External 1V8100nF3.3V100nFVCCBGNDTXD_3.3VRXD_3.3VRTS_3.3VCTS_3.3VDTR_3.3VDCD_3.3VRI_3.3V47K47KIdleHIGHLOWReceiving SMS and any URC report coming. AT+CFGRI=1RIClear by AT+CRIRSIdleHIGHLOWReceiving SMS . AT+CFGRI=0RIClear by AT+CRIRS SIM7500A Hardware Design_V1.09 Normally RI will be kept high 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. Figure 16: 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 Module from sleep. When Module enters sleep mode, pulling down DTR can wake Module. 3.4 USB Interface The Module contains a USB interface compliant with the USB2.0 specification as a peripheral, but the USB charging function is not supported. Module can be used as a USB device. Module supports the USB suspend and resume mechanism which can reduce power consumption. If there is no data transmission on the USB bus, Module will enter suspend mode automatically and will be resumed by some events such as voice call, receiving SMS, etc. The USB interface is a frequency used debug port; it is suggested to reserved test point. Figure 17: USB reference circuit www.simcom.com 27/56 HIGHLOWIdleRingEstablish the callHang up the callIdleRI100ms5900msUSB_VBUSUSB_DNUSB_DPGNDModuleAPD-D+GNDD2D1USB_IDUSB_VBUS0R_NM0R_NMTest point0R0RClose to moduleRouter not than 2mmTest point SIM7500A Hardware Design_V1.09 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 ). NOTE 1. The USB_DM and USB_DP nets must be traced by 90Ohm+/-10% differential impedance. 2. Must reserve USB interfaces or test points to for software debug. 3. Must reserve pin51(DBG_TXD) and PIN23(L11_1V8) interface or test point to for software debug. 3.5 SIM Interface Module supports both 1.8V and 3.0V SIM Cards. Table 11: SIM Electronic characteristic in 1.8V mode (SIM_VDD =1.8V) Symbol Parameter Min SIM_VDD LDO power output voltage 1.75 Type Max 1.8 1.95 Unit V High-level input voltage 0.65*SIM_VDD SIM_VDD +0.3 V Low-level input voltage

-0.3 0.35*SIM_VDD V High-level output voltage SIM_VDD -0.45

SIM_VDD Low-level output voltage 0 0.45 Table 12: SIM Electronic characteristic 3.0V mode (SIM_VDD =2.95V) Symbol Parameter SIM_VDD LDO power output voltage Min 2.75 Type Max 2.95 3.05 Unit V High-level input voltage 0.65*SIM_VDD SIM_VDD +0.3 V Low-level input voltage

-0.3 0.25*SIM_VDD V High-level output voltage SIM_VDD -0.45 SIM_VDD Low-level output voltage 0 0.45

0 0

0

0 V V V V VIH VIL VOH VOL VIH VIL VOH VOL www.simcom.com 28/56 SIM7500A Hardware Design_V1.09 3.5.1 SIM 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 SIM peripheral circuit should be close to the SIM card socket. The following figure shows the 8-pin SIM card holder reference circuit. Figure 18: Reference circuit of the 8-pin SIM card holder The SIM_DET pin is used for detection of the SIM card hot plug in. User can select the 8-pin SIM card holder to implement SIM card detection function. If the SIM card detection function is not used, user can keep the SIM_DET pin open. The reference circuit of 6-pin SIM card holder is illustrated in the following figure. Figure 19: SIM interface reference circuit NOTE SIM_DATA has been pulled up with a 10K resistor to SIM_VDD in module. A 100nF capacitor on SIM_VDD is used to reduce interference. For more details of AT commands about SIM, please refer to document [1]. www.simcom.com 29/56 ModuleUSIM_VDDUSIM_CLKUSIM_DATAUSIM_RSTUSIM_DETPRESENCE100nFMOLEX-91228USIM Card47KVDD_1V8VCCGNDRSTVPPCLKI/O22pF(NC)TVS1Deserved22R0R22R22R22pF(NC)22pF(NC)ModuleTVSUSIM_VDDUSIM_CLKUSIM_DATAUSIM_RSTVCC GNDRST VPPCLK I/O22100nFC707 10M006 512USIM Socket222222pF_NM22pF_NM22pF_NM SIM7500A Hardware Design_V1.09 3.5.2 SIM Card Design Guide SIM card signal could be interferenced by some high frequency signal, it is strongly recommended to follow these guidelines while designing:

The traces should be as short as possible SIM card holder should be far away from main antenna SIM traces should keep away from RF lines, VBAT and high-speed signal lines Keep SIM card holders GND connect to main ground directly Shielding the SIM card signal by ground well Recommended to place a 100nF capacitor on SIM_VDD line and keep close to the SIM card holder Add some TVS which parasitic capacitance should not exceed 50pF Add 22 resistor to (SIM_RST/SIM_CLK/SIM_DATA) signal could enhance ESD protection Mount 22pF capacitor to (SIM_RST/SIM_CLK/SIM_DATA) signal if having RF signal interference 3.5.3 Recommended SIM Card Holder It is recommended to use the 6-pin SIM 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 SIM Socket Pin Description Pin C1 C2 C3 C5 Signal SIM_VDD SIM_RST SIM_CLK GND Description SIM Card Power supply. SIM Card Reset. SIM Card Clock. Connect to GND. www.simcom.com 30/56 SIM7500A Hardware Design_V1.09 VPP SIM_DATA SIM Card data I/O. 3.6 PCM Interface Module provides a PCM interface for external codec, which can be used inmaster 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 Module supports 2.048 MHz PCM data and sync timing for 16 bits linear format codec. Figure 21: PCM_SYNC timing C6 C7 www.simcom.com 31/56 SIM7500A Hardware Design_V1.09 Figure 22: EXT CODEC to MODULE timing Figure 23: MODULE to EXT CODEC timing T(sync) T(synch) T(syncl) T(clk) T(clkh) T(clkl) T(susync) T(hsync) T(sudin) T(hdin) T(pdout) Table 15: PCM Timing parameters Parameter Description Min. Typ. Max. Unit PCM_SYNC cycle time PCM_SYNC high level time PCM_SYNC low level time PCM_CLK cycle time PCM_CLK high level time PCM_CLK low level time 60 125 488 124.5 488 244 244 122 366 s ns s ns ns ns ns ns ns ns ns PCM_SYNC setup time high before falling edge of PCM_CLK time after falling edge of PCM_SYNC hold PCM_CLK PCM_IN setup time before falling edge of PCM_CLK 60 PCM_IN hold time after falling edge of PCM_CLK Delay from PCM_CLK rising to PCM_OUT valid 60 www.simcom.com 32/56 T(zdout) Delay from PCM_CLK falling to PCM_OUT HIGH-Z 60 ns SIM7500A Hardware Design_V1.09 3.6.2 PCM Application Guide The following figure shows the external codec reference design. Figure 24: Audio Codec Reference Circuit NOTE Module can transmit PCM data by the USB port besides the PCM interface. For more details please refer to documents [1] and [23]. 3.7 I2C Interface Module provides a I2C interface compatible with I2C specification, version 2.1, with clock rate up to 400 kbps. Its operation voltage is 1.8V. 3.7.1 I2C Design Guide The following figure shows the I2C bus reference design. www.simcom.com 33/56 PCM_INPCM_SYNCPCM_CLKPCM_OUT100pFADCOUTFSBCLKDACINMCLKVDD_1V82.2K2.2KSCLKSDIOSCLSDAVDDAVDDSPKVDDD3.3V3.8VVDD_1V8MIC+MIC-MICBIASMOUTMICReceiver (32)NAU88(C)101.3K1.3K1uF1uF47uF47uFPADGNDVSSAVSSSPKAGNDGNDMust reserved 0R for debug!VSSDAGNDAGNDVREFSPKOUT+SPKOUT-AGND4.7uFAGNDModuleMust reserved 0R for debug!SIM7500A Hardware Design_V1.09 Figure 25: I2C reference circuit NOTE SDA and SCLhave pull-up resistors in module. So, 2 external pull up resistors are not 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]. 3.8 Network Status The NETLIGHT pin is used to control Network Status LED, its reference circuit is shown in the following figure. Figure 26: NETLIGHT reference circuit NOTE The value of the resistor named R depends on the LED characteristic. www.simcom.com 34/56 ModuleSDASDAGNDGNDSCLSCLDeviceNETLIGHT Module4.7K47K2.2KVBATR SIM7500A Hardware Design_V1.09 Table 16: 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 NOTE NETLIGHT output low level as OFF, and high level as ON. 3.9 Operating Status Indication The pin50 is for operating status indication of the module. The pin output is high when module is powered on, and output is low when module is powered off. Table 17: Pin definition of the STATUS Pin name Pin number Description STATUS 50 Operating status indication For timing about STATUS, please reference to the chapter 3.2 power on/down scenarios 3.10 Flight Mode Control The FLIGHTMODE pin can be used to control SIM7500x 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 is suggested to add on FLIGHTMODE pin, its reference circuit is shown in the following figure. www.simcom.com 35/56 SIM7500A Hardware Design_V1.09 4 5 12 18 19 20 21 Figure 27: Flight Mode Switch Reference Circuit Table 18: FLIGHTMODE Pin Status FLIGHTMODE Pin Status Module operation Input Low Level Input High Level Flight Mode: RF is closed AT+CFUN=0: RF is closed AT+CFUN=1:RF is working NOTE FlightMode Cant be used when Module is in sleep mode. 3.11 Pin Multiplex Function Some pins of Module could be used for alternate function besides default function. Table 19: Pin multiplex function list Pin Number Pin Name Default Function Alternate Function SCL SDA SIM_DET PCM_CLK PCM_SYNC PCM_IN SCL SDA GPIO34 PCM_CLK PCM_SYNC PCM_IN, PCM_OUT PCM_OUT GPIO11 GPIO10 SIM_DET GPIO23,SPI_CLK I2C_SCL GPIO20,SPI_MOSI GPIO21,SPI_MISO GPIO22,SPI_CS_N I2C_SDA www.simcom.com 36/56 ModuleFlightmode10KVDD_1V8TVS10K SIM7500A Hardware Design_V1.09 NOTE For more details of AT commands about GPIO multiplex function, please refer to document [1]. 3.12 Other interface 3.12.1 Sink Current Source The ISINK pin is VBAT tolerant and intended to drive some passive devices such as LCD backlight, white LED, etc. Its output current can be up to 40 mA and be set by the AT command AT+ CLEDITST. Table 20: 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 28: 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. www.simcom.com 37/56 ISINKModule2.2KVBATAT+ CLEDITSTControl SIM7500A Hardware Design_V1.09 3.12.2 ADC Module has 1 dedicated ADC pins named ADC. They are available for digitizing analog signals such as battery voltage and so on. These electronic specifications are shown in the following table. Table 21: ADC Electronic Characteristics Characteristics Resolution Input Range Input serial resistance NOTE Min. Typ. Max. Unit 0.1 1 15 1.7 Bits V M AT+CADC can be used to read the voltage of the ADC pins, for more details, please refer to document

[1]. www.simcom.com 38/56 SIM7500A Hardware Design_V1.09 RF Specifications 4.1 LTE RF Specifications Table 22: Conducted transmission power Table 23: Operating frequencies Frequency LTE-FDD B2 LTE-FDD B4 LTE-FDD B12 Frequency LTE-FDD B2 LTE-FDD B4 LTE-FDD B12 GPS GLONASS Power 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB Min.

<-40dBm

<-40dBm

<-40dBm Receiving 1930 ~1990 MHz 2110~2155 MHz 729 ~746 MHz Transmission 1850 ~1910 MHz 1710 ~1755 MHz 699 ~716 MHz 1574.4 1576.44 MHz 1598 1606 MHz

Table 24: Conducted receive sensitivity Frequency LTE FDD Receive sensitivity(Typical) Receive sensitivity(MAX) See table 21. 3GPP Table 25: Reference sensitivity (QPSK) E-UTRA band FDD B2 FDD B4 FDD B12 3GPP standard 1.4 MHz 3MHz 5MHz 10MHz 15 MHz 20 MHz

-102.7

-104.7

-101.7

-99.7

-101.7

-98.7

-98

-100

-97

-95

-97

-94

-93.2

-95.2

-92

-94

Test value@

10 MHz

-101

-102

-101.5 4.2 LTE Antenna Design Guide Users should connect antennas to Modules antenna pads through the micro-strip line or other types of RF www.simcom.com 39/56 SIM7500A Hardware Design_V1.09 trace. The trace impedance must be controlled in 50. SIMCom recommends that the total insertion loss between Module and antenna should meet the following requirements:

Table 26: Recommended Passive Antenna Characteristics Passive Direction Gain Efficiency VSWR Input impedance Table 27: Trace Loss Frequency 700MHz-960MHz 1710MHz-2170MHz 2300MHz-2650MHz Recommended standard Omnidirectional

>-3dBiAvg 50 ohm

>50%

<2 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 29: Antenna matching circuit (MAIN_ANT) In above figure, the components R1,C1,C2 and R2 are used for antenna matching, the value 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 Module and antenna must be controlled in 50. www.simcom.com 40/56 RF connectorR2C1MODULE45MAIN_ANTGNDC244R1Matching circuitMAIN ANTRF connectorR2C1MODULE45MAIN_ANTGNDC244R1Matching circuitMAIN ANTD1 SIM7500A Hardware Design_V1.09 Figure 30: Antenna matching circuit (DIV_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 28: Recommended TVS Part Number WE05DGCMS-BH PESD0402-03 PESD0402-12 Vender CYGWAYON PRISEMI PRISEMI SIMCom suggests the LTE auxiliary antenna to be kept on, since there are many high bands in the designing of FDD-LTE. 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 [24]

Package 0201 0402 0402 NOTE www.simcom.com 41/56 R4C3MODULE2DIV_ANTGNDC41R3Matching circuitDiversity antennaD2 SIM7500A Hardware Design_V1.09 4.3 GNSS SIM7500A merges GNSS 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/-159dBm(BD) 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 BD: 1559.05~1563.14 MHz Update rate: Default 1 Hz GNSS data format: NMEA-0183 GNSS Current consumption : 100mA ((WCDMA/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 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 as GNSS signal transceiver. In this document, all GNSS specification mentioned is from passive antenna. The following is the reference circuit. www.simcom.com 42/56 SIM7500A Hardware Design_V1.09 Figure 31: Active antenna circuit NOTE If customer need save the power when the GNSS function is disabled, then customer should design a switch circuit to cut off the active antenna power to get a lower power consumption. Figure 32: Passive antenna circuit (Default) In above figures, the components C1 and L1, L2 are used for antenna matching, the values of the components can only be obtained after the antenna tuning and usually provided by antenna vendor. C2 in Figure 29 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. LNA should apply the following requirements as table 28. LNA is also suggested to put near the passive antenna. Table 29: LNA requirements www.simcom.com 43/56 56MODULE55GNSS_ANTGND54GNDMatching circuitGNSS Active ANTL1C1VDD47nHC2L210 ohm33pFD356MODULE55GNSS_ANTGND54GNDMatching circuitL1C1L2LNAGNSS Passive ANTD4 SIM7500A Hardware Design_V1.09 Parameter Min Vdd 1.5 Idd LNA_EN Gain VSWR 1.3 14 Max 3.3 3 17 2 Unit V mA V dB GNSS can be used by NMEA port. User can select NMEA as output through UART or USB. NMEA sentences are automatic and no command is provided. NMEA sentences include GSV, GGA, RMC, GSA, and VTG. Before using GNSS, user should configure SIM7500A in proper operating mode by AT command. Please refer to related document for details. SIM7500A can also get position location information through AT directly. NOTE GNSS is closed by default, it could 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. www.simcom.com 44/56 SIM7500A Hardware Design_V1.09 Electrical Specifications 5.1 Absolute Maximum Ratings Absolute maximum rating for digital and analog pins of Module are listed in the following table:

Table 30: Absolute maximum ratings Parameter Voltage at VBAT Voltage at VBUS Voltage digital at

(RESET,SPI,GPIO,I2C,UART,PCM) Voltage at digital pins :SIM Voltage at PWRKEY pins Min

-0.5

-0.5

-0.3

-0.3

-0.3 Max 4.7 5.5 2.1 3.05 1.8 Unit V V V V V VIH VIL VOH VOL IOH IOL IIH IIL 5.2 Operating Conditions Table 31: Recommended operating ratings Parameter Voltage at VBAT Voltage at VBUS Min 3.4 3.0 Type 3.8 5 Max 4.2 5.25 Unit V V Table 32: 1.8V Digital I/O characteristics Parameter Description Max. Unit High-level input voltage Low-level input voltage High-level output voltage 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) Min. 1.17

-0.3 1.35 0

Input low leakage current(no

-1 Typ. 1.8 0

2

-2

2.1 0.63 1.8 0.45 1

V V V V mA mA uA uA www.simcom.com 45/56 SIM7500A Hardware Design_V1.09 pull up resistor) NOTE These parameters are for digital interface pins, such as SPI, GPIOs (NETLIGHT), I2C, UART, PCM. The operating temperature of Module is listed in the following table. Table 33: Operating temperature Parameter Normal operation temperature Min

-10 Type 25 Max 55 Unit 5.3 Operating Mode 5.3.1 Operating Mode Definition The table below summarizes the various operating modes of Module series products. Table 34: Operating Mode Definitions Mode Function n o i t a r e p o l a m r o N LTE Sleep LTE Idle LTE Talk LTE Standby LTE transmission Minimum functionality mode 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 and TCP/UDP. 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, FR/EFR/HR, hopping sequences, 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 can be used to set the module to a minimum functionality mode without removing the power www.simcom.com 46/56 SIM7500A Hardware Design_V1.09 supply. In this mode, the RF part of the module will not work and the SIM 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+CFUN=4 or pulling down AT command 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 by pulling 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. 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, SMS and TCP/UDP. Several hardware and software conditions must be satisfied together in order to let Module 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 [25]

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) AT+CFUN=4: Flight mode If Module has been set to minimum functionality mode, the RF function and SIM card function will be closed. In this case, the serial port and USB are still accessible, but RF function and SIM card will be unavailable. www.simcom.com 47/56 SIM7500A Hardware Design_V1.09 If Module 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 Module 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 35: Current consumption on VBAT Pins (VBAT=3.8V) GNSS GNSS supply current

(AT+CFUN=0,with USB connection) LTE Sleep/Idle mode LTE supply current

(without USB connection) LTE Data LTE-FDD B2 LTE-FDD B4 LTE-FDD B12 5.5 ESD Notes

@-140dBmTracking Typical:35mA Sleep mode @DRX=9 Typical: 2.3mA Idle mode @DRX=9 Typical: 17.5mA

@5 MHz 22.2dBm Typical: 589mA

@10 MHz 22.7dBm Typical: 577mA

@20 MHz 22.4dBm Typical: 626mA

@5 MHz 23.1dBm Typical: 519mA

@10 MHz 23.0dBm Typical: 556mA

@20 MHz 22.8dBm Typical: 600mA

@5 MHz 22.7dBm Typical: 516mA

@10 MHz 22.9dBm Typical: 512mA Module is sensitive to ESD in the process of storage, transporting and assembling. Especially, Module is mounted on the users mother board, The ESD components should be placed beside the connectors which human body might touch, such as SIM card holder, audio jacks, switches and keys, etc. The following table shows the Module ESD measurement performance without any external ESD component. Table 36: The ESD performance measurement table (Temperature: 25, Humidity: 45%) Part GND VBAT USB UART PCM Antenna port Contact discharge Air discharge

+/-4K

+/-4K

+/-4K

+/-1K

+/-1K

+/-1K

+/-8K

+/-8K

+/-8K

+/-2K

+/-2K

+/-2K www.simcom.com 48/56 SIM7500A Hardware Design_V1.09 Other PADs

+/-1K

+/-2K SMT Production Guide 6.1 Top and Bottom View of Module Figure 33: Top and bottom view of Module NOTE The above is the design effect diagram of the module for reference. The actual appearance is subject to the actual product. www.simcom.com 49/56 A B C D E F G H SIM7500A Hardware Design_V1.09 6.2 Label Information Figure 34: Label Information Table 37: The Description of Label Information No. Description LOGO No.1 Pin Project Name Product Code Serial Number QR code International Mobile Equipment Identity Federal Communications Commission 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 constraints. www.simcom.com 50/56 SIM7500A Hardware Design_V1.09 2a 1 2 3 4 5 Figure 35: The ramp-soak-spike Reflow Profile of Module NOTE For more details about secondary SMT, please refer to the document [21]. 6.4 Moisture Sensitivity Level (MSL) Module 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 38: Moisture Sensitivity Level and Floor Life Moisture Sensitivity Level (MSL) Life Floor

(out ambient30C/60% RH or as stated Unlimited at 30/85% RH bag) of at factory 1 year 4 weeks 168 hours 72 hours 48 hours www.simcom.com 51/56 SIM7500A Hardware Design_V1.09 24 hours Mandatory bake before use. After bake, it must be reflowed within the time limit specified on the label. NOTE 5a 6 IPC / JEDEC J-STD-033 standard must be followed for production and storage. 6.5 Stencil Foil Design Recommendation The recommended thickness of stencil foil is 0.13mm. www.simcom.com 52/56 SIM7500A Hardware Design_V1.09 Packaging Module support tray packaging. Figure 36: Packaging introduce Module tray drawing:

Figure 37: Tray drawing Table 39: Tray size www.simcom.com 53/56 SIM7500A Hardware Design_V1.09 Length3mm Width3mm 242.0 161.0 Number 15 Small carton drawing:

Figure 38: Small carton drawing introduce Table 40: Small Carton size Length10mm Width10mm Height10mm Number 270 180 15*20=300 120 Big carton drawing:

www.simcom.com 54/56 SIM7500A Hardware Design_V1.09 Figure 39: Big carton drawing introduce Table 41: Big Carton size Length10mm Width10mm Height10mm Number 380 280 280 300*4=1200 www.simcom.com 55/56 SIM7500A Hardware Design_V1.09 8 Notes This module meets the requirements of FCC part 22/24/27. The module is a single module. This module complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body. "This module is designed to comply with the FCC statement, FCC ID is: 2AJYU-8PYA00A and". The host system using this module should have label in a visible area indicated the following texts:

"Contains FCC ID: 2AJYU-8PYA00A" or Contains FCC ID: 2AJYU-8PYA00A. The module comply with FCC Part 15 Subpart B. Host manufacturer must perfom test of radiated & conducted emission and spurious emission, etc according to the actual test modes for a stand-alone modular transmitter in a host, as well as for multiple simultaneously transmitting modules or other transmitters in a host product. Only when all the test results of test modes comply with FCC requirements, then the end product can be sold legally. www.simcom.com 56/56