Product Name Version Doc No Date AI7688H2 MT7688 WIFI Module A 901-09003 May 16, 2022 Document History Date Revised Contents Revised by Version May 16th,2022 Initial Version Kevin A Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 1 of 22 INDEX 1. Description .................................................................................................................................................3 1.1. Platform Features .................................................................................................................................3 2. Block Diagram ...........................................................................................................................................4 2.1. Typical application ...............................................................................................................................5 2.2. Specification ..........................................................................................................................................6 3. Electrical Characteristics .........................................................................................................................7 3.1. Absolute Maximum Ratings ................................................................................................................7 3.2. RF Characteristics ................................................................................................................................7 3.2.1. RF Characteristics for 802.11b 11M ................................................................................................7 3.2.2. RF Characteristics for 802.11g 54M ................................................................................................8 3.2.3. RF Characteristics for 802.11n MCS7(HT20) ................................................................................8 3.2.4. RF Characteristics for 802.11n MCS7(HT40) ................................................................................8 4. Pin Definition .............................................................................................................................................9 4.1. Detailed Pin Description ......................................................................................................................9 4.2. AI7688H2 Dimension ...........................................................................................................................12 4.3. AI7688H2 Footprint Dimension ..........................................................................................................13 4.4. Antenna Connector Dimension .........................................................................................................14 5. Regulator..................................................................................................................................................14 6. Recommended Reflow Profile ................................................................................................................15 7. SiP Module Preparation .........................................................................................................................16 7.1. Handling ..............................................................................................................................................16 7.2. SMT Preparation ................................................................................................................................16 8. Package Information...............................................................................................................................17 8.1. Product Making ..................................................................................................................................17 8.2. Tray Dimension...................................................................................................................................18 8.3. Packing Information ..........................................................................................................................19 8.4. Humidity Indicator Card ...................................................................................................................19 9. Warning....................................................................................................................................................20 Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 2 of 22 1. Description RAK Technology Corp. introduces a low-cost and low-power consumption IoT module. The module is an operating system designed for Wearables and Internet of Things (IoT) devices that can connect to other smart devices or directly to cloud applications and services. AI7688H2 is one of the most highly integrated SIP module for IoT prototyping
. 1.1. Platform Features Gene ral Embedded MIPS24KEc (575/580 MHz) with 64 KB I-Cache and 32 KB D-Cache 1T1R 2.4 GHz with 150 Mbps PHY data rate Legacy 802.11b/g and HT 802.11n modes 20/40 MHz channel bandwidth 802.11v Green AP/STA Intelligent Clock Scaling
(exclusive) DDRII: ODT off, Self-refresh mode 1-port 10/100 FE PHY x1 USB 2.0 Host, SPI/SD-XC/eMMC SPI,I2C, I2S,PCM, UART, JTAG, GPIO Internet Of Thing An optimized PMU 16 Multiple BSSID WEP64/128, TKIP, AES, WPA, WPA2, WAPI QoS: WMM, WMM-PS AP/STA Fi mware: Linux 2.6.36 SDK, OpenWrt Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 3 of 22 2. Block Diagram Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 4 of 22 2.1. Typical application Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 5 of 22 2.2. Specification Model Name Chipset Core Clock Speed Memory Flash Operation Conditions Temperature Humidity Dimension Package AI7688H2 MT7688AN MIPS24KEc 580MHz DDR2 128MB 32MB Operating : -40 ~ +85 Storage : -40 ~ +85 Operating : 10 ~ 95% (Non-Condensing) Storage : 5 ~ 95% (Non-Condensing) 24mm X 32mm X1.8mm (Typ.) LGA 65Pin Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 6 of 22 3. Electrical Characteristics 3.1. Absolute Maximum Ratings Symbol Parameter Min. Typ. Max. Unit VBAT Supply Voltage I/O Voltage I/O supply voltage 3 3 3.3 3.3 3.6 3.6 V V 3.2. RF Characteristics Test Condition Temperature Humidity 26.8 C 30%
3.2.1. RF Characteristics for 802.11b 11M 802.11b Transmit (Conductive) Item Condition Min. Typ. Max. Unit Frequency Range Channel 1 Channel 13 Tx Power Level DQPSK Frequency Tolerance Spectral Mask 11MHz22MHz 22MHz Modulation Accuracy All Data Rate 18.0
-15 20.0 0 40 53 15 802.11b Receiver (Conductive) 22.0 15 dBm ppm dBr dBr
Item Condition Min. Typ. Max. Unit Frequency Range Channel 1 Channel 13 Min. Input 11Mbps PER<8%
-91.5
-89.5
-87.5 dBm Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 7 of 22 3.2.2. RF Characteristics for 802.11g 54M Item Condition Min. Typ. Max. Unit 802.11g Transmit (Conductive) Frequency Range Tx Power Level Frequency Tolerance Channel 1 Channel 13 OFDM 15.0
-15 17.0 0
-31 19.0 15
-28 dBm ppm Modulation Accuracy All data rate 802.11g Receiver (Conductive) Item Condition Min. Typ. Max. Unit Frequency Range Channel 1 Channel 13 Min. Input 54Mbps PER<10%
-78.0
-76.0
-74.0 3.2.3. RF Characteristics for 802.11n MCS7(HT20) 802.11n_HT20 Transmit (Conductive) Item Condition Min. Typ. Max. Unit Frequency range Tx Power Level Frequency Tolerance Channel 1 Channel 13 OFDM 15.0
-15 17.0 0
-31 19.0 15
-28 dBm ppm dB Modulation Accuracy All Data Rate 802.11n_HT20 Receiver (Conductive) Item Condition Min. Typ. Max. Unit Frequency Range Channel 1 Channel 13 Min. Input MCS7 PER<10%
-76.5
-74.5
-72.5 dBm 3.2.4. RF Characteristics for 802.11n MCS7(HT40) 802.11n_HT40 Transmit (Conductive) Item Condition Min. Typ. Max. Unit Frequency range Tx Power Level Frequency Tolerance Channel 1 Channel 13 OFDM 15.0
-15 17.0 0
-31 19.0 15
-28 dBm ppm dB Modulation Accuracy All Data Rate 802.11n_HT40 Receiver (Conductive) Item Condition Min. Typ. Max. Unit Frequency Range Channel 1 Channel 13 Min. Input MCS7 PER<10%
-76.5
-74.5
-72.5 dBm Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 8 of 22 4. Pin Definition 4.1. Detailed Pin Description Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 9 of 22 SD_D2SD_D3SD_CMDSD_CLKSD_D0SD_D1SD_CDSD_WPUSB_DMUSB_DPUART_RXD0UART_TXD0GPIO0MDI_TN_P0MDI_TP_P0MDI_RN_P0MDI_RP_P03029282726252423222120191817161514GND3113GNDUART_RXD23212I2C_SDUART_TXD23311I2C_SCLKMDI_RN_P23410I2S_CLKMDI_RP_P2359I2S_WSMDI_RN_P1368I2S_SDOMDI_RP_P1377I2S_SDIMDI_TN_P1386UART_RXD1MDI_TP_P1395UART_TXD1GND404JTAG_RST_NGND413JTAG_TDOGND422JTAG_TMSGND43P1P2P3P41GND4445464748495051525354555657585960GNDWLED_NREF_CLKOPERST_NWDT_RST_NPORST_NPCIE_TXP0PCIE_TXN0PCIE_RXP0PCIE_RXN03V3PCIE_CKN0PCIE_CKP0JCLKJTDIGNDWiFi_RF_OUTGNDGNDGNDGNDGND Module_pinout Pin NAME DIGITAL Pin SERIAL Pin Other 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 GND JTAG_TMS JTAG_TDO GPIO 43 EPHY LED JTAG_RST_N UART_TXD1 GPIO 45 UART_TXD1 UART_RXD1 GPIO 46 UART_RXD1 I2S_SDI I2S_SDO I2S_WS I2S_CLK I2C_SCLK I2C_SD MDI_RP_P0 MDI_RN_P0 MDI_TP_P0 MDI_TN_P0 GPIO0 GPIO 0 GPIO 1 GPIO 2 GPIO 3 GPIO 4 GPIO 5 I2S_SDI I2S_SDO I2S_WS I2S_CLK I2C SCL I2C SDA GND ETHY RD+
ETHY RD-
ETHY TD+
ETHY TD-
UART_TXD0 GPIO 12 UART_TXD0 UART_RXD0 GPIO 13 UART_RXD0 USB D+
USB D-
USB_DP USB_DM SD_WP SD_CD SD_D1 SD_D0 SD_CLK SD_CMD SD_D3 SD_D2 Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 10 of 22 Module_pinout Pin NAME DIGITAL Pin SERIAL Pin Other 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 GND UART_RXD2 GPIO 21 UART_RXD2 UART_TXD2 GPIO 20 UART_TXD2 MDI_RN_P2 MDI_RP_P2 GPIO 19 GPIO 18 MDI_RN_P1 GPIO 17 MDI_RP_P1 GPIO 16 MDI_TN_P1 GPIO 15 MDI_TP_P1 GIPO 14 PWM2 PWM3 PWM0 PWM1 Wi-Fi LED REF_CLK WiFi RESET MPU RESET GND GND GND GND GND WLED_N REF_CLKO GPIO 37 PERST_N WDT_RST_N PORST_N PCIE_TXP0 PCIE_TXN0 PCIE_RXP0 PCIE_RXN0 PCIE_CKN0 PCIE_CKP0 JCLK JTDI 3v3 GND 2.4G_RF P1 P2 P3
SPI_CLK SPI_MOSI SPI_MISO GPIO7 GPIO8 GPIO9 SPI_CLK SPI_MOSI SPI_MISO Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 11 of 22 P4
SPI_CS1 GPIO6 SPI_CS1
*IF P1P2P3P4 are not used, please do not connect them (DNC) 4.2. AI7688H2 Dimension UNIT mm TOP VIEW Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 12 of 22 4.3. AI7688H2 Footprint Dimension UNIT:mm TOPVIEW Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 13 of 22 4.4. Antenna Connector Dimension 5. Regulator This SiP module is pre-scaned on module level to comply with following standards:
FCC IDENTIFIER2AF6B-AI7688H2 CE Test Report No. LD160513C24 Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 14 of 22 6. Recommended Reflow Profile Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 15 of 22 7. SiP Module Preparation 7.1. Handling Handling the module must wear the anti-static wrist strap to avoid ESD damage. After each module is aligned and tested, it should be transport and storage with anti -static tray and packing. This protective package must be remained in suitable environment until the module is assembled and soldered onto the main board. 7.2. SMT Preparation 1. Calculated shelf life in sealed bag: 6 months at<40 and <90% relative humidity (RH). 2. Peak package body temperature: 250. 3. After bag was opened, devices that will be subjected to reflow solder or other high temperature process must. A. Mounted within: 168 hours of factory conditions<30/60%RH. B. Stored at10%RH with N2 flow box. 4. Devices require baking, before mounting, if:
A. Package bag does not keep in vacuumed while first time open. B. Humidity Indicator Card is >10% when read at 235. C. Expose at 3A condition over 8 hours or Expose at 3B condition over 24 hours. 5. If baking is required, devices may be baked for 12 hours at 1255. Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 16 of 22 8. Package Information 8.1. Product Making Figure 1 below details the standard product marking for all RAK Corp. products. Cross reference to the applicable line number and table for a full detail of all the variables. RAK Corp. Logo Product part number Pin 1 identifier Figure 1 Standard Product Marking Diagram- TOP VIEW Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 17 of 22 8.2. Tray Dimension Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 18 of 22 8.3. Packing Information 8.4. Humidity Indicator Card Product Name Version Doc No Date Page AI7688H2 MT7688 WIFI Module A 901-09003 May 16,2022 19 of 22 9 Warning FCC Warning 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;
(2) This device must accept any interference received, including interference that may cause undesired operation. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FCC Statement:
"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 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."
INTEGRATION INSTRUCTIONS 1. This Modular Approval is limited to OEM installation for mobile and fixed applications only. The antenna installation and operating configurations of this transmitter, including any applicable source-based time- averaging duty factor, antenna gain and cable loss must satisfy MPE categorical Exclusion Requirements of 2.1091. This equipment complies with FCC & Industry Canada exposure limits set forth for an uncontrolled environment. 2. When the module is installed in the host device, the FCC ID label must be visible through a window on the final device or it must be visible when an access panel, door or cover is easily removed. If not, a second label must be placed on the outside of the final device that contains the following text: Contains FCC ID: 2AF6B-AI7688H2. RAK2287X 3. The Shenzhen Rakwireless Technology Co., Ltd. modular transmitter is only FCC authorized for the FCC Part15.247 listed on the grant, and that the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B compliant (when it also contains unintentional-
radiator digital circuity), then the grantee shall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed. ISED Warning:
This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canadas licence-exempt RSS(s). Operation is subject to the following two conditions:
1. This device may not cause interference. 2. This device must accept any interference, including interference that may cause undesired operation of the device. Lmetteur/rcepteur exempt de licence contenu dans le prsent appareil est conforme aux CNR dInnovation, Sciences et Dveloppement conomique Canada applicables aux appareils radio exempts de licence. Lexploitation est autorise aux deux conditions suivantes :
1. Lappareil ne doit pas produire de brouillage;
1 2. Lappareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible den compromettre le fonctionnement. This equipment complies with FCC & Industry Canada exposure limits set forth for an uncontrolled environment, this Transmitter must be installed to provide a separation distance of at least 20 cm from all persons. L'quipement est conforme aux limites d'exposition tablies par fac et Industrie Canada pour les environnements non contrls, Cet metteur doit tre install pour fournir une distance de sparation d'au moins 20 cm de toute personne. The host product shall be properly labelled to identify the modules within the host product. The ISED certification label of a module shall be clearly visible at all times when installed in the host product; otherwise, the host product must be labelled to display the ISED certification number for the module, preceded by the word "contains"
or similar wording expressing the same meaning, as follows:
Contains IC: 25908-AI7688H2 Le numro d'homologation d'ISDE, le NIVM, le NMP et le NIVL ne doivent pas ncessairement tre adjacents. Le numro d'homologation se compose d'un numro de compagnie (NC), attribu par le Bureau d'homologation et de services techniques dISDE, suivi du numro de produit 1 RAK2287X unique (NPU) attribu par le requrant. Le numro d'homologation doit apparatre comme suit : IC: 25908- AI7688H2 Labelling The proposed FCC IC label format is to be placed on the module. If it is not visible when the module is installed into the system, Contains FCC ID: 2AF6B-AI7688H2, Contains IC: 25908-AI7688H2 shall be placed on the outside of final host system. Labelling This radio transmitter [25908-AI7688H2] has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device. Le prsent metteur radio [25908-AI7688H2] a t approuv par Innovation, Sciences et Dveloppement conomique Canada pour fonctionner avec les types d'antenne numrs cidessous et ayant un gain admissible maximal. Les types d'antenne non inclus dans cette liste, et dont le gain est suprieur au gain maximal indiqu pour tout type figurant sur la liste, sont trictement interdits pour l'exploitation de l'metteur. Antenna info Antenna #
Model 1#
6147F00027 Antenna Gain 3dBi Manufacturer Signal Plus Technology Co., Ltd Antenna Type PCB layout Antenna 2 2