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SIM7912&SIM7906

Hardware Design

SIMCom Wireless Solutions Limited

SIMCom Headquarters Building, Building 3, No. 289 Linhong

Road, Changning District, Shanghai P.R. China

Tel: 86-21-31575100

support@simcom.com

www.simcom.com

LTE Module

Summary of content (86 pages)

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SIM7912&SIM7906 Hardware Design LTE Module SIMCom Wireless Solutions Limited SIMCom Headquarters Building, Building 3, No. 289 Linhong Road, Changning District, Shanghai P.R. China Tel: 86-21-31575100 support@simcom.com www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 Document Title: Version: Date: Status: SIM7912&SIM7906 Hardware Design V1.03 2022-03-07 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.
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SIM7912&SIM7906 Hardware Design V1.02 Version History Date Version Description of change Author 2021-07-30 V1.00 Initial release 2021-10-28 V1.01 Update SIM7906 module data Update the Power on and Reset data Update the current consumption data Update the ESD data Update the 209 pin definition Hongjun Tu Meng Zhang Wenke Gan 2021-12-06 V1.02 Update comment in PCIe Meng Zhang 2022-03-07 V1.03 Exchanged LTE band B29&B30 to B28&B40 for SIM7912A&SIM7906A. Wenke Gan www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 Contents 1 Introduction .......................................................................................................................................... 10 1.1 Product Outline .................................................................................................................................. 10 1.2 Hardware Block Diagram .................................................................................................................. 12 1.
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SIM7912&SIM7906 Hardware Design V1.02 4.2.1 4.2.2 4.2.3 PCB Layout Guidelines ............................................................................................................... 57 Antenna Tuner............................................................................................................................. 57 Antenna Requirements ............................................................................................................... 60 5 Electrical Specifications ..........
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SIM7912&SIM7906 Hardware Design V1.02 Table Index Table 1: SIM7912 frequency bands ......................................................................................................... 10 Table 2: SIM7906 frequency bands ......................................................................................................... 11 Table 3: Key features ...............................................................................................................................
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SIM7912&SIM7906 Hardware Design V1.02 Table 43: VBAT recommended operating ratings.................................................................................... 62 Table 44: 1.8V digital I/O characteristics ................................................................................................. 63 Table 45: Operating temperature............................................................................................................. 63 Table 46: Operating mode definition ..................
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SIM7912&SIM7906 Hardware Design V1.02 Figure Index Figure 1: SIM7912&SIM7906 module block diagram ............................................................................. 12 Figure 2: Pin assignment ......................................................................................................................... 15 Figure 3: Dimensions of SIM7912&SIM7906 (unit: mm) ........................................................................
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SIM7912&SIM7906 Hardware Design V1.02 Figure 43: Small carton drawing.............................................................................................................. 77 Figure 44: Big carton drawing ................................................................................................................. 77 www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 1 Introduction This document describes the electronic specifications, RF specifications, interfaces, mechanical characteristics and test results of the SIM7912 and SIM7906 module. With the help of this document， customers can quickly understand SIM7912 and SIM7906 module. Associated with other software application notes and user guides, customers can use module to easily design and develop application products. 1.
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SIM7912&SIM7906 Hardware Design V1.
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SIM7912&SIM7906 Hardware Design V1.02 1.2 Hardware Block Diagram The block diagram of SIM7912&SIM7906 is shown in the following figure.
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SIM7912&SIM7906 Hardware Design V1.02  Antenna Network Indication GNSS Features SMS SIM interface                    PCIe interface UART interface I2C interface     Support downlink QPSK, 16-QAM and 64-QAM and **256-QAM modulation Support 1.
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SIM7912&SIM7906 Hardware Design V1.02 Temperature range    Normal operation temperature: -30°C to +75°C Extended operation temperature: -40°C to +85°C Storage temperature: -40°C to +90°C RoHS  All hardware components are fully compliant with EU RoHS directive NOTE 1. “*” means under development. 2．“**” means SIM7912 supported，SIM7906 unsupported. www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 2 Package Information 2.1 Pin Assignment Overview The following figure shows the pin assignment of SIM7912&SIM7906.
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SIM7912&SIM7906 Hardware Design V1.02 NOTE 1. Keep all RESERVED pins and unused pins unconnected. 2. GND pins 215~299 should be connected to ground in the design. 2.
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SIM7912&SIM7906 Hardware Design V1.02 VIH High level input 1.3V 2.1V VIL Low level input 0.3V - 0.5V VDD_P4/P5=1.8V P4/P5 VOH High level output 1.45V - 1.8V VOL Low level output 0V - 0.4V VIH High level input 1.26V - 2.1V VIL Low level input 0V - 0.36V VDD_P4/P5=3.0V VOH High level output 2.4V - 3V VOL Low level output 0V - 0.4V VIH High level input 2.1V - 3.05V VIL Low level input 0V - 0.57V Table 6: Pin description Power supply Pin name Pin No.
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SIM7912&SIM7906 Hardware Design V1.02 Pin name Pin No. Electrical description Description RESIN_N 1 DI,PU P3 Reset the module, active low PWRKEY 2 DI,PU P3 Power on/off the module, active low Comment 1.8V power domain. Pulled up internally. Active low. 1.8V power domain. Pulled up internally. Active low. Status indication Pin name Pin No.
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SIM7912&SIM7906 Hardware Design V1.02 VMAX=1.9V VMIN=1.7V For 3.0V SIM: VMAX=3.05V VMIN=2.75V automatically. If unused, please keep open SIM1_DATA 29 DIO P4 SIM1 card data signal, which has been pulled up to SIM1_VDD by a 20K resistor internally SIM1_CLK 27 DO P4 SIM1 clock signal SIM1_RST 28 DO P4 SIM1 reset signal DI P3 SIM1 card detect signal, which need pulled up to VDD_EXT by a 470K resistor externally PO For 1.8V SIM: VMAX=1.9V VMIN=1.7V For 3.0V SIM: VMAX=3.05V VMIN=2.
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SIM7912&SIM7906 Hardware Design V1.02 Pin name Pin No. Electrical description Description CTS 56 DO P3 Clear to send RTS 57 DI P3 Request to send RXD 58 DI P3 Receive data DCD 59 DO P3 Data Carrier detect TXD 60 DO P3 Transmit data RI 61 DO P3 Ring indicator P3 Data terminal ready, sleep mode control: Pulled up by default. Pulling down to low level will wake up the module. Default use command Comment DTR 62 DI Pin name Pin No.
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SIM7912&SIM7906 Hardware Design V1.02 DBG_ RXD 136 DI P3 Receive data DBG_ TXD 137 DO P3 Transmit data 1.8V power domain. If unused, keep it open. Comment PCM & I2C interface Pin name Pin No.
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SIM7912&SIM7906 Hardware Design V1.02 PCIe_TX_P 183 AO PCIe transmit plus PCIe_RX_M 185 AI PCIe receive minus PCIe_RX_P 186 AI PCIe receive plus PCIe_CLK_ REQ_N 188 DI P3 PCIe clock request PCIe_WAKE 190 DI P3 PCIe wake-up PCIe_RST 189 DO P3 PCIe reset In master mode, it is an input signal. In slave mode, it is an output signal. If unused, keep it open. In master mode, it is an input signal. In slave mode, it is an output signal. If unused, keep it open.
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SIM7912&SIM7906 Hardware Design V1.02 SD_DATA0 49 DIO P2 SDC data bit 0 or eMMC* data bit 0 SD_DATA1 50 DIO P2 SDC data bit 1 or eMMC data bit 1 SD_DATA2 47 DIO P2 SDC data bit 2 or eMMC data bit 2 Required 50Ω impedance If unused, keep it open. SD_DATA3 48 DIO P2 SDC data bit 3 or eMMC data bit 3 SD_CMD 51 DIO P2 SDC command output SD_CLK 53 DO P2 SDC clock output SD_DET 52 DI,PU P3 SD card insertion detection 1.8V power domain, If unused, keep it open.
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SIM7912&SIM7906 Hardware Design V1.02 RFFE_DATA 73 DIO P3 external tuner control If unused, keep it open. Antenna interface Pin name Pin No.
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SIM7912&SIM7906 Hardware Design V1.02 2.3 Mechanical Dimensions The following figure shows the mechanical dimensions of SIM7912&SIM7906. Figure 3: Dimensions of SIM7912&SIM7906 (unit: mm) www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 3 Interface Application 3.1 Power Supply Module provides six VBAT pins dedicated to connection with an external power supply. There are two separate voltage domains for VBAT.  Four VBAT_RF pins for module’s RF part  Two VBAT_BB pins for module’s baseband part The following table shows details of VBAT pins and ground pins. Table 7: VBAT pins electronic characteristics Pin Name Pin No.
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SIM7912&SIM7906 Hardware Design V1.02 To decrease the voltage dropping, make sure that the capacitors of VBAT net must not less than 640uF. The following figure shows the reference circuit of power supply for the VBAT. VBAT_RF VBAT FB101 C3 100nF C2 100uF C1 220uF C8 C7 33pF 100nF C6 100uF 220uF C4 33pF TVS1 5V VBAT_BB Module C5 Figure 5: Power supply reference circuit In this reference circuit, some multi-layer ceramic chip (MLCC) capacitors (0.
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SIM7912&SIM7906 Hardware Design V1.02  The customer’s PCB design must have a solid ground plane throughout the board as the primary reference plane for most signals. 3.1.2 Recommended Power Supply Circuit It is recommended to use a switching mode power supply or a linear regulator power supply. Make sure it can provide the current up to 3A at least. The following figure shows the linear regulator reference circuit with 5V input and 3.8V output.
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SIM7912&SIM7906 Hardware Design V1.02 2. It is suggested that customer's design should have the ability to switch off the power supply for module in abnormal state, and then switch on the power to restart the module. 3. The PWR_CTRL signal recommend connect to the host and can be controlled. 3.1.3 Voltage Monitor To monitor the VBAT voltage, the AT command “AT+CBC” can be used. NOTE For more details about voltage monitor commands, please refer to Document [1] in the appendix. 3.
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SIM7912&SIM7906 Hardware Design V1.02 Pin name Pin no. I/O Functional description Comment PWRKEY 2 DI Power on/off the module, active low 1.8V power domain. Pulled-up internally. Active low The power on sequence is shown in the following figure.
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SIM7912&SIM7906 Hardware Design V1.02 3.2.2 Power Off The following methods can be used to power off the module. ● Method 1: Power off the module by holding the PWRKEY to a low level 2 second then release. ● Method 2: Power off the module by AT command “AT+CPOF”. For details about “AT+CPOF”, please refer to Document [1] in the appendix. NOTE If the temperature is outside the range of -30~+70℃, some warning will be reported via AT port.
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SIM7912&SIM7906 Hardware Design V1.02 1. In order to avoid damaging internal flash, please do not switch off the power supply when the module works normally. Only after the module is shut down by PWRKEY or AT command, the power supply can be cut off. 2. When turning off module with AT command, please keep PWRKEY at high level after the execution of power-off command. Otherwise, the module will be turned on again after successful turn-off. 3.
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SIM7912&SIM7906 Hardware Design V1.02 Pin name Pin no. I/O Functional description RESET_N 1 DI Reset the module active low Comment Table 13: RESET electronic characteristics Symbol Description Min. Typ. Max. Treset The time of holding on RESET_N pin to a low level 250 500 - Unit ms The reset timing sequence of the module is shown in the following figure. VBAT 1.2V ≤VIH ≤1.9V ≥500ms 0V ≤VIL ≤0.
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SIM7912&SIM7906 Hardware Design V1.02 Module provides one integrated Universal Serial Bus (USB) interface which complies with the USB 3.0 and 2.0 specifications. This USB interface supports super speed (5Gbps) on USB 3.0 and high speed (480 Mbps) and full speed (12 Mbps) modes on USB 2.0. The USB interface is used for AT command communication, data transmission, GNSS NMEA output, firmware upgrade and software debugging. The following table shows the pin definition of USB interface.
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SIM7912&SIM7906 Hardware Design V1.02 Choose one of R1 and Q1 USB_VBUS R1 3.6V~5.25V 0Ω S D Q1 G GPIO USB_DP USB_DP USB_DM Base band 10 0nF USB_SS_TX_P 10 0nF USB_SS_TX_M USB_DM USB_SS_RX_P USB_SS_RX_M USB_SS_RX_P C1 10 0nF USB_SS_RX_M C2 10 0nF USB_ID GND Module VDD USB_SS_TX_P USB_SS_TX_M Close to Host GPIO GND Host Figure 15: Reference Circuit of USB Application NOTE 1. USB_VBUS is used for USB insertion detection. Its voltage input range is 3.6V~5.25V. 2.
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SIM7912&SIM7906 Hardware Design V1.02   Gap from other signals keeps 4xline width. Gap between Rx-to-Tx keeps 4xline width.    External components should be placed near the USB connector. Trace routes away from other sensitive signals (RF, especially 2.4 GHz). Route differential pairs in the inner layers with a solid GND reference to have good impedance control and to minimize discontinuities. Keep isolation between the Tx pair, Rx pair, and DP/DM to avoid crosstalk.
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SIM7912&SIM7906 Hardware Design V1.02 input signal. If unused, keep it open PCIe interface layout guidelines:         All other sensitive/high-speed signals and circuits must be protected from PCIe corruption. PCIe signals must be protected from noisy signals (clocks, SMPS). Each trace needs to be adjacent to a ground plane. Require differential trace impedance is 90±10% Ω. The intra-lane length mismatch of the differential signal lanes is less than 500um.
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SIM7912&SIM7906 Hardware Design V1.02 VDD_EXT HOST 100K 100K Module PCIe_WAKE PCIe_CLKREQ PCIe_RST 100K PCIe_WAKE PCIe_CLKREQ PCIe_RST 100nF PCIe_RX _M PCIe_RX _P PCIe_ TXM PCIe_ TXP 100nF Close to AP 100nF PCIe_TX _M PCIe_TX _P PCIe_ RXM PCIe_ RXP 100nF PCIe_REFCLK_M PCIe_ CLKM PCIe_REFCLK_P PCIe_ CLKP USB_DP 0R USB_DM 0R USB_DP USB_DM Figure 17: PCIe interface reference circuit (EP) NOTE 1.
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SIM7912&SIM7906 Hardware Design V1.02 SD_VDD 46 PO SD card application: SDIO pull up power source. eMMC application: Keep it open when used for eMMC. SD_DATA0 49 DIO SDIO data signal (bit 0) SD_DATA1 50 DIO SDIO data signal (bit 1) SD_DATA2 47 DIO SDIO data signal (bit 2) SD_DATA3 48 DIO SDIO data signal (bit 3) SD_CMD 51 DIO SDIO command signal SD_CLK 53 DO SDIO clock signal SD_DET 52 DI SD card insertion detection 1.8V/3.0V configurable output.
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SIM7912&SIM7906 Hardware Design V1.02           Require trace impedance is 36 to 50Ω. CLK to DATA/CMD length mismatch is less than 0.5mm. 30–35Ω termination resistance on clock net and placed close to the module. Gap from other signals keeps 1.5xline width. Gap lane-to-lane 1.5xline width. Bus capacitance load is less than 5pF. Trace routes away from other sensitive signals. Maximum PCB trace length cannot exceed 30mm out of the module for 104Mbps data rate, the shorter trace and more better.
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SIM7912&SIM7906 Hardware Design V1.02 Symbol Parameter Min. Typ. Max. Unit SIM_VDD Power supply for SIM card 1.65 1.8 1.95 V VIH High-level input voltage 1.26 - 1.95 V VIL Low-level input voltage 0 - 0.36 V VOH High-level output voltage 1.44 - 1.8 V VOL Low-level output voltage 0 - 0.4 V Table 20: SIM electronic characteristics 3.0V mode (SIM_PWR=3.0V) Symbol Parameter Min. Typ. Max. Unit SIM_VDD Power supply for SIM card 2.7 3.0 3.
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SIM7912&SIM7906 Hardware Design V1.02 Using “AT+SMSIMCFG=1,1” and “AT+SMSIMCFG=1,2” AT command to switch SIM1 and SIM2 function, for more details, please refer to Document [1] in the appendix. The following table shows recommended TVS of ESD protect and SIM socket. Table 21: Recommended TVS and SIM socket list Name Manufacturer Model TVS ST ESDA6V1-5W6 SIM socket MUP MUP-C792-3 If the SIM card hot-swap function is not used, customers should keep the SIM_DET pin open. NOTE 1.
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SIM7912&SIM7906 Hardware Design V1.02 Pin name Pin no. I/O Functional description PCM_OUT 68 DO PCM data output. It can also be multiplexed as I2S_D1. PCM_IN 66 DI PCM data input. It can also be multiplexed as I2S_D0. PCM_CLK 67 DO PCM data clock. It can also be multiplexed as I2S_CLK. PCM_SYNC 65 DIO PCM data frame synchronization signal. It can also be multiplexed as I2S_WS. I2S_MCLK 152 DO Clock output Comment 1.8V power domain. If unused, please keep open. 1.8V power domain.
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SIM7912&SIM7906 Hardware Design V1.02 Figure 20: I2S timing Table 24: I2S timing parameters Signal I2S_MCLK I2S_CLK I2S_WS 3.9.2 Parameter Description Min. Typ. Max. Unit Frequency Frequency – 12.288 12.288 MHz T Clock period 81.380 81.380 – ns t(HC) Clock high 0.45T – 0.55T ns t(LC) Clock low 0.45T – 0.55T ns Frequency Frequency - 1.536 - MHz T Clock period - 651.04 - ns t(HC) Clock high 0.45T – 0.55T ns t(LC) Clock low 0.45T – 0.
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SIM7912&SIM7906 Hardware Design V1.02 Audio layout guidelines： Analog input:  0.2mm trace widths; 0.2mm spacing between traces.  Pseudo differential route for MIC.  Isolate from noise sources, such as antenna, RF signals, SMPS, clocks, and other high-speed signals. Analog output:  Isolate from noise sources such as antenna, RF signals, SMPS, clocks, and other digital signals with fast transients.  Speaker output signal – route as differential pair with 0.5mm trace widths. 3.
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SIM7912&SIM7906 Hardware Design V1.02 NOTE 1. SDA and SCL need to pull up to VDD_EXT by a 2.2K resistor externally. 2. For more details about AT commands please refer to Document [1] in the appendix. 3.11 UART Interface The module provides three UART interfaces: main UART interface, debug UART interface, and BT UART interface.
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SIM7912&SIM7906 Hardware Design V1.02 chip needs to be added in the middle. It is recommended to use TI’s TXS0104EPWR level shift, the reference circuit is as follows. VDD_1V8 100pF VDD_3V3 VCCB VCCA GND OE 100pF UART_CTS UART_RTS A1 A2 B1 B2 UART_CTS_3V3 UART_RTS_3V3 UART_TXD UART_RXD A3 A4 B3 B4 UART_TXD_3V3 UART_RXD_3.3V TXS0104EPWR Figure 23: UART level conversion circuit The following level shifting circuits can also be used: VDD_1V8 Module DTE VDD 4.7K VDD_EXT 4.
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SIM7912&SIM7906 Hardware Design V1.02 3.12 SPI Interface Module provides one SPI interface multiplexed from BT UART interface. The interface only supports master mode with a maximum clock frequency up to 50MHz. The following table shows the pin definition of SPI interface. Table 27: Definition of SPI interface Pin name Pin no. I/O Functional description Comment BT_CTS 164 DO Can be multiplexed into SPI_CLK. BT_ RTS 166 DI Can be multiplexed into SPI_CS.
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SIM7912&SIM7906 Hardware Design V1.02 If unused, keep it open. ADC1 175 AI Input Voltage Range: 0~1.875V General purpose analog to digital converter interface If unused, keep it open. NOTE 1. The input voltage of ADC should not exceed 1.875V 2. It is prohibited to supply any voltage to ADC pins when VBAT is removed. 3. It is recommended to use resistor divider circuit for ADC application. 3.
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SIM7912&SIM7906 Hardware Design V1.02 Pin name Pin no. I/O Functional description Comment NET_STATU S 170 DO Indicate the module’s network activity status. 1.8V power domain. If unused, keep it open NET_MODE 147 DO Indicate the module’s network registration mode. 1.8V power domain. If unused, keep it open The timing parameters are shown in the following table.
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SIM7912&SIM7906 Hardware Design V1.02 The following table describes pin definition of STATUS. VBAT Module 1K STATUS 4.7K Figure 28: Reference Circuits of STATUS 3.17 Flight Mode Control The W_DISABLE pin can be used to control module to enter or exit the flight mode. In flight mode, the RF circuit is closed to prevent interference with other equipment’s and minimize current consumption. Its reference circuit is shown in the following figure.
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SIM7912&SIM7906 Hardware Design V1.02 Table 33: W_DISABLE pin status W_DISABLE pin status Module operation Input low level Flight mode: RF is disabled Input high level AT+CFUN=4: Flight mode AT+CFUN=1: RF is enabled (Default) 3.18 USB_BOOT Interface Module provides a USB_BOOT pin. Pulling up USB_BOOT to VDD_EXT before power-on will make the module enter emergency download mode when powered on. In this mode, the module supports firmware upgrade over USB interface.
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SIM7912&SIM7906 Hardware Design V1.02 Table 35: PIN Definition of RFFE Interface for Antenna Tuner Control Pin name Pin no. I/O RFFE_CLK 71 DO RFFE_DATA 73 DIO VDD_RF 162 PO Functional description Comment RFFE serial interface for external tuner control. 1.8V voltage domain. If unused, please keep open Provide 2.85V for external RF circuit. NOTE 1. “*” means under development, for details please contact SIMCom support teams. www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 4 Antenna Interfaces Module provides five antennas for 3G/4G and GNSS. The antenna ports have an RF impedance of 50Ω. 4.1 Antenna Definitions For detailed designs about antenna, please refer to the antenna design guide Document [14] “SIM7912&SIM7906_LGA Antenna Port Mapping and Design Guide” in the appendix.
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SIM7912&SIM7906 Hardware Design V1.
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SIM7912&SIM7906 Hardware Design V1.
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SIM7912&SIM7906 Hardware Design V1.02 4.1.2 GNSS Frequency The following table shows frequency specification of GNSS antenna interface. Table 39: GNSS frequency Type Frequecy GPS L1/Galileo/QZSS 1575.42±1.023MHz GPS L5 1176.45±10.23MHz GLONASS 1597.5~1605.8MHz BeiDou/Compass 1561.098±2.046MHz 4.2 Antenna Installation 4.2.
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SIM7912&SIM7906 Hardware Design V1.02 ANT tuner FEED 3G/4G MODULE ANT CONTRL OR RFFE MIPI Figure 31: Aperture tuner reference block diagram ANT FEED 3G/4G MODULE ANT CONTRL OR tuner RFFE MIPI Figure 32: Impedance tuner reference block diagram www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 ANT tuner 3G/4G MODULE FEED ANT CONTRL OR tuner RFFE MIPI Figure 33: Hybrid tuner reference block diagram The antenna control Tuner mipi interface of different package modules is as follows. Figure 34: M.2 package Tuner mipi interface www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 Figure 35: LGA package Tuner mipi interface NOTE 1. When multiple Tuners are needed, pay attention to the distinction of the same device USID under the same group of mipi; 2. For details please refer to the Antenna Tuner Reference Design document and contact SIMCom support teams. 4.2.3 Antenna Requirements The following table shows the requirements on 3G/4G antennas and GNSS antenna.
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SIM7912&SIM7906 Hardware Design V1.02 Table 41: GNSS antenna (for dedicated GNSS antenna only)* Parameter Requirement Operating Frequency L1: 1559~1609MHZ L5: 1166~1187MHz Direction Hemisphere, face to sky Antenna Gain > 2 dBic Impedance 50 Ω Efficiency > 50 % Max. Input Power 50W VSWR <2 Polarization RHCP or Linear Noise Figure for Active Antenna < 1.5 Total Gain for Active Antenna < 17 dB Cable Insertion Loss <1.
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SIM7912&SIM7906 Hardware Design V1.02 5 Electrical Specifications 5.1 Absolute Maximum Ratings Absolute maximum rating for digital and analog pins of module are listed in the following table: Table 42: Absolute maximum ratings Parameter Min. Typ. Max. Unit Voltage at VBAT pins - - 4.7 V Voltage at USB_VBUS - - 5.5 V Voltage at PWRKEY - - 2.1 V Voltage at RESIN_N - - 1.9 V Voltage at digital pins (GPIO, I2C, UART, I2S) - - 2.1 V Voltage at digital pins SIM - - 3.
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SIM7912&SIM7906 Hardware Design V1.02 Table 44: 1.8V digital I/O characteristics Parameter Description Min. Typ. Max. Unit VIH High-level input voltage 1.17 - 2.1 V VIL Low-level input voltage 0 - 0.63 V VOH High-level output voltage 1.35 - 1.8 V VOL Low-level output voltage 0 - 0.45 V NOTE These parameters are for digital interface pins, such as UART, I2C, I2S, SPI, and GPIOs (SIM_DET, SD_DET). Table 45: Operating temperature Parameter Min. Typ. Max.
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SIM7912&SIM7906 Hardware Design V1.02 communicate. Talk 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 and antenna. Standby Module is ready for data transmission, but no data is currently sent or received. In this case, power consumption depends on network settings. Data transmission There is data transmission in progress.
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SIM7912&SIM7906 Hardware Design V1.02 5.3.3 Minimum Functionality Mode and Flight Mode Minimum functionality mode ceases a majority function of Module, in order to minimizing the power consumption. This mode is set by the AT command which provides a choice of 3 different functionality levels.
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SIM7912&SIM7906 Hardware Design V1.02 (GNSS off, without connection USB) LTE FDD 15.465 mA LTE TDD 9.25 mA HSDPA data WCDMA B2 WCDMA B4 @Power 22.30dBm Typical: 536 mA WCDMA B5 @Power 23.05dBm Typical: 553 mA @Power 22.28dBm Typical: 586 mA LTE data LTE-FDD B2 LTE-FDD B4 LTE-FDD B5 LTE-FDD B7 LTE-FDD B12 LTE-FDD B13 LTE-FDD B14 LTE-FDD B17 LTE-FDD B25 LTE-FDD B26 LTE-TDD B41 LTE-FDD B66 LTE-TDD B71 www.simcom.com @5MHz @10MHz @20MHz @5MHz @10MHz @20MHz 21.31dBm 21.25dBm 21.32dBm 23.12dBm 23.
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SIM7912&SIM7906 Hardware Design V1.02 NOTE 1. The VBAT include VBAT_BB and VBAT_RF pins. 2. The current consumption of Table 47: Current consumption on VBAT pins (VBAT=3.8V) based on SIM7912E and it is only for reference, please refer to actual current consumption. 5.5 RF Output Power The RF output power is shown in the following table.
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SIM7912&SIM7906 Hardware Design V1.02 5.6 Conducted Receive Sensitivity Module conducted RF receiving sensitivity is fully meet 3GPP specification. Customers can get more details by check 3GPP official website http://www.3gpp.org/. 5.7 Thermal Design Make sure that the module can reach maximum work performance under extended temperature or extreme conditions for a long time, thermal dissipation design is very important.
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SIM7912&SIM7906 Hardware Design V1.02 2. The data in Table 49: The ESD performance measurement table (temperature: 25℃, humidity: 45%) were tested using SIMCom EVB. www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 6 Manufacturing 6.1 Top and Bottom View of Module Figure 36: Top and bottom view of Module 6.2 Label Description Information A B C D E F Figure 37: Label description of module www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 Table 50: Label description of module information No. Description A LOGO B Project name C Product code D QR code E Serial number F International mobile equipment identity NOTE Figure 36: Top and bottom view of and Figure 37: Label description of module are the effect diagrams of the module, for reference only. Please refer to the actual product for appearance. www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 6.3 Recommended PCB Footprint The following figure shows the PCB footprint of SIM7912&SIM7906. Figure 38: Recommended PCB footprint www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 6.4 Recommended SMT Stencil The following figure shows the SMT stencil of SIM7912&SIM7906. Figure 39: Recommended SMT stencil www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 6.5 Recommended SMT Reflow Profile The following figure shows the SMT reflow profile of SIM7912&SIM7906. Figure 40: Recommended SMT reflow profile NOTE Refer to “Module secondary-SMT-UGD” for more information about the module shipping and manufacturing. www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 6.6 Moisture Sensitivity Level (MSL) Module is susceptible to damage induced by absorbed moisture and high temperature. A package’s moisture-sensitivity level (MSL) indicates its ability to withstand exposure after it is removed from its shipment bag, while it is on the factory floor awaiting PCB installation. A low MSL rating is better than a high rating; a low MSL device can be exposed on the factory floor longer than a high MSL device.
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SIM7912&SIM7906 Hardware Design V1.02 7 Packaging Module supports tray packaging. The packaging process is shown in the following figures. Figure 41: Packaging process Module tray drawing： Figure 42: Module tray drawing www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 Table 53: Tray size Length（±3mm） Width（±3mm） Number 242.0 161.0 8 Figure 43: Small carton drawing Table 54: Small carton size Length（±10mm） Width（±10mm） Height（±10mm） Number 270 180 120 8*19-2=150 Big carton drawing： Figure 44: Big carton drawing www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 Table 55: Big carton size Length（±10mm） Width（±10mm） Height（±10mm） Number 380 280 280 150*4=600 www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 8 Appendix 8.1 Coding Schemes and Maximum Net Data Rates over Air Interface Table 56: Coding schemes and maximum net data rates over air interface HSDPA device category Max data rate（peak） Modulation type Category 1 1.2Mbps 16QAM,QPSK Category 2 1.2Mbps 16QAM,QPSK Category 3 1.8Mbps 16QAM,QPSK Category 4 1.8Mbps 16QAM,QPSK Category 5 3.6Mbps 16QAM,QPSK Category 6 3.6Mbps 16QAM,QPSK Category 7 7.2Mbps 16QAM,QPSK Category 8 7.
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SIM7912&SIM7906 Hardware Design V1.02 Category 4 3.84Mbps QPSK Category 5 3.84Mbps QPSK Category 6 5.
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SIM7912&SIM7906 Hardware Design V1.02 8.2 Related Documents Table 57: Related documents NO. Title [1] [2] SIM7912&SIM7906 Series AT Command Manual ITU-T Draft new ecommendation.25ter [3] 3GPP TS 51.010-1 [4] 3GPP TS 34.124 [5] 3GPP TS 34.121 [6] 3GPP TS 34.123-1 [7] 3GPP TS 34.
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SIM7912&SIM7906 Hardware Design V1.02 [15] SIM7912&SIM7906_CA COMBO list CA list for SIM7912 and SIM7906 [16] Antenna Tuner reference design Antenna tuning method and antenna tuning reference design example www.simcom.
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SIM7912&SIM7906 Hardware Design V1.02 8.
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SIM7912&SIM7906 Hardware Design V1.
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SIM7912&SIM7906 Hardware Design V1.02 8.4 Safety Caution Table 59: 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.
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FCC Caution. § 15.19 Labelling requirements. This device complies with part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. § 15.21 Information to user. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. § 15.105 Information to the user.