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Quectel EG915U Series, Hardware Design

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                                                                            LTE  Standard  Module  Series

 

EG915U_Series_Hardware_Design                                                                                                          11  / 81 

 
 

2

 

Product Overview 

 

EG915U  series  module  is  an  LTE-FDD,  LTE-TDD  and  GSM  wireless  communication  module,  which 

provides  data  connectivity  on  LTE-FDD,  LTE-TDD  and  GPRS  networks.  It  also  provides  voice 

functionality, Bluetooth and Wi-Fi Scan

 1 

to meet your specific application demands. Related information 

and details are listed in the table below: 

 

Table 2: Brief Introduction of the Module

 

 

2.1. Frequency Bands and Functions 

Table 2: Wireless Network Type 

 

1

  EG915U series support Bluetooth and Wi-Fi Scan functions. Due to the shared antenna interface, the two functions 

cannot be used simultaneously. Bluetooth and Wi-Fi Scan functions are optional (both supported or not), please contact 
Quectel Technical Support for details. 

2

  Only EG915U-CN provides LTE-TDD, please consult Quectel Technical Support for details. 

Categories 

Packaging and pins number 

126-pin; LGA

 

Dimensions 

(23.6 ±0.2 ) mm × (19.9 ±0.2 ) mm × (2.4

±

0.2 )mm

 

Weight 

2.5 ±0.2 g

 

Wireless network functions 

LTE/GSM/Bluetooth/Wi-Fi Scan

  1

 

Variants 

EG915U-CN

  2

; EG915U-EU; EG915U-LA 

Wireless Network 

Type 

EG915U-CN 

EG915U-EU 

EG915U-LA 

LTE-FDD 

B1/B3/B5/B8 

B1/B3/B5/B7/B8/B20/B28 

 

B2/B3/B4/B5/B7/B8/B28 

/B66 

LTE-TDD 

B34/B38/B39/B40/B41  - 

- 

GSM

 

900/1800 MHz

 

850/900/1800/1900 MHz 

 

850/900/1800/1900 MHz 

 

Bluetooth and Wi-Fi 

Scan

 1

 

2.4 GHz 

2.4 GHz 

2.4 GHz 

Summary of Contents for EG915U Series

Page 1: ...EG915U Series Hardware Design LTE Standard Module Series Version 1 0 Date 2021 11 23 Status Released ...

Page 2: ...ugh we employ commercially reasonable efforts to provide the best possible experience you hereby acknowledge and agree that this document and related services hereunder are provided to you on an as available basis We may revise or restate this document from time to time at our sole discretion without any prior notice to you Use and Disclosure Restrictions License Agreements Documents and informati...

Page 3: ...icy To implement module functionality certain device data are uploaded to Quectel s or third party s servers including carriers chipset suppliers or customer designated servers Quectel strictly abiding by the relevant laws and regulations shall retain use disclose or otherwise process relevant data for the purpose of performing the service only or as permitted by applicable laws Before data intera...

Page 4: ...use interference on sensitive medical equipment so please be aware of the restrictions on the use of wireless devices when in hospitals clinics or other healthcare facilities Cellular terminals or mobiles operating over radio signal and cellular network cannot be guaranteed to connect in certain conditions such as when the mobile bill is unpaid or the U SIM card is invalid When emergency help is n...

Page 5: ...dware_Design 4 81 About the Document Revision History Version Date Author Description 2021 11 23 Len CHEN Reuben WANG Frank WANG Ailsa WANG Creation of the document 1 0 2021 11 23 Len CHEN Reuben WANG Frank WANG Ailsa WANG First official release ...

Page 6: ...nario 26 3 2 2 USB Application Scenario 27 3 2 2 1 USB Application with USB Remote Wakeup Function 27 3 2 2 2 USB Application with USB Suspend Resume and MAIN_RI Wakeup Function 29 3 3 Airplane Mode 30 3 3 1 Hardware 30 3 3 2 Software 30 3 4 Power Supply 30 3 4 1 Power Supply Pins 30 3 4 2 Reference Design for Power Supply 31 3 4 3 Requirements for Voltage Stability 31 3 5 Turn on 32 3 5 1 Turn on...

Page 7: ...Frequency 55 5 1 3 Reference Design of Antenna Interface 57 5 1 4 Operating Frequency 58 5 2 Antenna Installation 60 5 2 1 Antenna Design Requirement 60 5 2 2 RF Connector Recommendtion 60 6 Electrical Characteristics Reliability 63 6 1 Absolute Maximum Ratings 63 6 2 Power Supply Ratings 63 6 3 Operation and Storage Temperatures 64 6 4 Power Consumption 64 6 5 Tx Power 72 6 6 Rx Sensitivity 73 6 ...

Page 8: ...tion of PSM Interface 51 Table 19 Pin Definition of Indication Signal 51 Table 20 Working State of Network Connection Status Activity Indication 52 Table 21 Pin Definition of STATUS 53 Table 22 Behaviors of the MAIN_RI 54 Table 23 Pin Definition of Control Signal 54 Table 24 Pin Definition of RF Antennas 55 Table 25 Operating Frequency of EG915U CN 55 Table 26 Operating Frequency of EG915U EU 56 T...

Page 9: ...f U SIM Interface with an 8 Pin U SIM Card Connector 44 Figure 21 Reference Circuit of U SIM Interface with a 6 Pin U SIM Card Connector 44 Figure 22 Reference Circuit of I2 C and PCM Application with Audio Codec 46 Figure 23 Reference Circuit with Translator Chip 48 Figure 24 Reference Circuit with Transistor Circuit 48 Figure 25 Reference Circuit of Wake up Module from PSM 51 Figure 26 Reference...

Page 10: ...LTE Standard Module Series EG915U_Series_Hardware_Design 9 81 Figure 42 Reel Specifications 83 Figure 43 Tape and Reel Directions 84 ...

Page 11: ...related information of the module Associated with application notes and user guides customers can use this module to design and to set up mobile applications easily 1 1 Special Mark Table 1 Special Mark Mark Definition Unless otherwise specified when an asterisk is used after a function feature interface pin name AT command or argument it indicates that the function feature interface pin AT comman...

Page 12: ... Due to the shared antenna interface the two functions cannot be used simultaneously Bluetooth and Wi Fi Scan functions are optional both supported or not please contact Quectel Technical Support for details 2 Only EG915U CN provides LTE TDD please consult Quectel Technical Support for details Categories Packaging and pins number 126 pin LGA Dimensions 23 6 0 2 mm 19 9 0 2 mm 2 4 0 2 mm Weight 2 5...

Page 13: ...ass 1 30 dBm 2 dB LTE FDD Class 3 23 dBm 2 dB EG915U LA GSM850 EGSM900 Class 4 33 dBm 2 dB DCS1800 PCS1900 Class 1 30 dBm 2 dB LTE FDD Class 3 23 dBm 2 dB LTE Features EG915U CN Supports up to Cat 1 FDD TDD Supports 1 4 3 5 10 15 20 MHz RF bandwidth Supports uplink QPSK 16QAM Supports downlink QPSK 16QAM and 64QAM FDD Max 10 Mbps DL 5 Mbps UL TDD Max 8 96 Mbps DL 3 1 Mbps UL EG915U EU Supports up ...

Page 14: ...mission Baud rates reach up to 921600 bps 115200 bps by default Supports RTS and CTS hardware flow control Debug UART Used for the output of partial logs Baud rate 921600 bps Only used for debug UART cannot be used for universal UART Auxiliary UART SPI Interface Supports one SPI Interface master mode only I2C Interface Supports one I2C Interface PCM Interface Supports one PCM Interface Audio Featu...

Page 15: ...Transceiver PA PAM ANT_MAIN VBAT_RF PWRKEY ADCs VDD_EXT 2x U SIM PCM UARTs I2C Control Duplex Tx PRx STATUS RESET_N SAW ANT_BT WIFI_SCAN 26 MHz DCXO SPI Nor Flash 64Mb PSRAM 128Mb MIC 32 kHz Clock USB SPI SPK Control VBAT_BB Figure 1 Functional Diagram 4 Within operating temperature range the module meets 3GPP specifications 5 Within extended temperature range the module remains the ability to est...

Page 16: ...T RESERVED RESERVED PSM_EINT RESERVED RESERVED GRFC1 GRFC2 103 104 103 115 114 103 118 113 2 112 111 103 106 105 107 116 103 108 117 109 110 RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED 119 126 120 121 122 123 124 125 MIC_N MIC_P SPK_P SP...

Page 17: ...D Open Drain PI Power Input PO Power Output Power Supply Pin Name Pin No I O Description DC Characteristics Comment VBAT_BB 32 33 PI Power supply for the module s baseband part Vmax 4 3 V Vmin 3 3 V Vnom 3 8 V It must be provided with sufficient current up to 1 A VBAT_RF 52 53 PI Power supply for the module s RF part It must be provided with sufficient current up to 2 5 A VDD_EXT 29 PO Provide 1 8...

Page 18: ...sed keep it open NET_STATUS 21 DO Indicate the module s network activity status VOHmin 1 35 V VOLmax 0 45 V 1 8 V power domain If unused keep it open USB Interface Pin Name Pin No I O Description DC Characteristics Comment USB_VBUS 8 AI USB connection detect Vmax 5 25 V Vmin 3 5 V Vnom 5 0 V Typical 5 0 V If unused keep it open USB_DP 9 AIO USB differential data USB 2 0 compliant Require different...

Page 19: ... V VOHmin 1 35 V For 3 0 V U SIM VOLmax 0 45 V VOHmin 2 55 V USIM1_RST 44 DO U SIM1 card reset For 1 8 V U SIM VOLmax 0 45 V VOHmin 1 35 V For 3 0 V U SIM VOLmax 0 45 V VOHmin 2 55 V USIM1_DET 42 DI U SIM1 card hot plug detect VILmin 0 3 V VILmax 0 6 V VIHmin 1 26 V VIHmax 2 0 V 1 8 V power domain If unused keep this pin open USIM1_GND 47 Ground Specified ground for U SIM1 card USIM2_VDD 87 PO U S...

Page 20: ...2 55 V USIM2_DET 83 DI U SIM2 card hot plug detect VILmin 0 3 V VILmax 0 6 V VIHmin 1 26 V VIHmax 2 0 V 1 8 V power domain If unused keep it open Main UART Interface Pin Name Pin No I O Description DC Characteristics Comment MAIN_CTS 36 DO DTE clear to send signal to DCE connect to DTE s CTS VOLmax 0 45 V VOHmin 1 35 V 1 8 V power domain If unused keep it open MAIN_DTR MAIN_DCD MAIN_RI will have a...

Page 21: ...Hmin 1 35 V 1 8 V power domain If unused keep it open AUX_RXD 28 DI Auxiliary UART receive VILmin 0 3 V VILmax 0 6 V VIHmin 1 26 V VIHmax 2 0 V 1 8 V power domain If unused keep it open Debug UART Interface Pin Name Pin No I O Description DC Characteristics Comment DBG_RXD 22 DI Debug UART receive VILmin 0 3 V VILmax 0 6 V VIHmin 1 26 V VIHmax 2 0 V 1 8 V power domain If unused keep it open DBG_TX...

Page 22: ...26 V VIHmax 2 0 V PCM_DOUT 7 DO PCM data output VOLmax 0 45 V VOHmin 1 35 V RF Antenna Interface Pin Name Pin No I O Description DC Characteristics Comment ANT_MAIN 60 AIO Main antenna interface 50 Ω impedance ANT_BT WIFI_SCAN 56 AIO The shared interface for Bluetooth and Wi Fi Scan 50 Ω impedance If unused keep it open GRFC Antenna Tuner Control Interface Pin Name Pin No I O Description DC Charac...

Page 23: ...scription DC Characteristics Comment MIC_N 119 AI Microphone analog input MICBIAS 120 PO Bias voltage output for microphone Vo 2 2 3 0 V Vnom 2 2 V SPK_P 121 AO Analog audio differential output SPK_N 122 AO Analog audio differential output MIC_P 126 AI Microphone analog input USB_BOOT Pin Name Pin No I O Description DC Characteristics Comment USB_BOOT 75 DI Control pin for module to enter download...

Page 24: ...lled up by default When it is in low voltage level the module can enter airplane mode If unused keep it open When the pin is powered on there will be a period of time when the level status is uncertain AP_READY 19 DI Application processor ready VILmin 0 3 V VILmax 0 6 V VIHmin 1 26 V VIHmax 2 0 V 1 8 V power domain If unused keep it open When the PIN pin is powered on there will be a period of tim...

Page 25: ...5 1 The functions of PSM and GRFC are under development and it is not recommended to use them right now please consult Quectel Technical Support for details 5 PIN18 MAIN_W_DISABLE PIN19 AP_READY PIN30 MAIN_DTR PIN38 MAIN_DCD PIN39 MAIN_RI When the module is powered on there will be a period of time when the power level is indeterminate First high level 3V lasts for 2 seconds then low power Ping la...

Page 26: ...lowing chapters Table 5 Overview of Operating Modes Mode Details Normal Operation Idle Software is active The module is registered on the network and ready to send and receive data Talk Data Network connection is ongoing In this mode the power consumption is decided by network setting and data transfer rate Minimum Functionality Mode AT CFUN 0 command can set the module to a minimum functionality ...

Page 27: ... sleep mode Drive MAIN_DTR to high level The following figure shows the connection between the module and the host MAIN_RXD MAIN_TXD MAIN_RI MAIN_DTR AP_READY TXD RXD EINT GPIO GPIO Module Host GND GND Figure 3 Sleep Mode Application via UART Driving MAIN_DTR low will wake up the module When EG915U series has a URC to report the URC will trigger the behavior of MAIN_RI pin See Chapter 4 10 3 for d...

Page 28: ...ace enters suspend state The following figure shows the connection between the module and the host 3 2 2 1 USB Application with USB Remote Wakeup Function The host supports USB Suspend Resume and remote wakeup function The following figure illustrates the connection between the module and the host USB_VBUS USB_DP USB_DM AP_READY VDD USB_DP USB_DM GPIO Module Host GND GND Figure 4 Sleep Mode Applic...

Page 29: ...d Module Series EG915U_Series_Hardware_Design 28 81 1 Under Linux OS USB support Suspend under Windows OS nonsupport Suspend 2 Pay attention to the level match shown in dotted line between the module and the host ...

Page 30: ...p function the MAIN_RI signal is needed to wake up the host The following figure shows the connection between the module and the host USB_VBUS USB_DP USB_DM AP_READY VDD USB_DP USB_DM GPIO Module Host GND GND MAIN_RI EINT Figure 5 Sleep Mode Application with MAIN_RI Sending data to the module through USB will wake up the module When the module has a URC to report the URC will trigger the behavior ...

Page 31: ... fun provides choices of the functionality level through setting fun into 0 1 or 4 AT CFUN 0 Minimum functionality disable RF function and U SIM function AT CFUN 1 Full functionality default AT CFUN 4 Airplane mode disable RF function 3 4 Power Supply 3 4 1 Power Supply Pins The module provides 4 VBAT pins for connection with an external power supply Two VBAT_RF pins for RF part Two VBAT_BB pins f...

Page 32: ...g voltage difference between the input source and the desired output VBAT a buck converter is recommended The following figure illustrates a reference design for 5 V input power source The typical output of the power supply is about 3 8 V and the maximum load current is 3 0 A DC_IN MIC29302WU IN OUT EN GND ADJ 2 4 1 3 5 VBAT 100K 47K 470R 51K 1 4 7K 47K VBAT_EN 470 μF 470 μF 100 nF 100 nF 1 Figure...

Page 33: ... as a power supply pin that is without charging function the width of the VBAT_SENSE trace should not be less than 1 mm In principle the longer the VBAT trace is the wider it will be In addition to avoid the surge use a TVS diode of which reverse working voltage is 4 7 V and peak pulse power is up to 2550 W The reference circuit is shown as below Module VBAT_RF VBAT_BB VBAT C1 100 µF C6 100 nF C7 ...

Page 34: ... Circuit Another way to control the PWRKEY is using a button directly When you are pressing the key electrostatic strike may be generated from finger Therefore you must place a TVS component nearby the button for ESD protection A reference circuit is shown in the following figure PWRKEY S1 Close to S1 TVS Figure 10 Turing on the Module Using Button The power up scenario is illustrated in the follo...

Page 35: ...ing procedures can be used to turn off the module Using the PWRKEY pin Using AT QPOWD 1 Make sure that the VBAT is stable before pulling down PWRKEY pin It is recommended that the time difference between powering up VBAT and pulling down PWRKEY pin is no less than 30 ms 2 PWRKEY can be pulled down directly to GND with a recommended 1 kΩ resistor if the module needs to be powered on automatically a...

Page 36: ...r details about AT QPOWD command 1 To avoid damaging internal flash do not switch off the power supply when the module works normally Only after shutting down the module with PWRKEY or AT command can you cut off the power supply 2 When keeping the PWRKEY to the ground and the AT command cannot be used to turn off the module can only be forced to turn off by cutting off the VBAT power supply Theref...

Page 37: ...it with ground Table 8 Pin Description of RESET_N The recommended circuit is similar to the PWRKEY control circuit An open drain collector driver or button can be used to control the RESET_N Reset pulse RESET_N 4 7K 47K 100 ms Figure 13 Reference Circuit of RESET_N by Using Driving Circuit RESET_N S2 Close to S2 TVS Figure 14 Reference Circuit of RESET_N by Using Button The reset scenario is illus...

Page 38: ...ning RESET_N Baseband restart Baseband resetting 100 ms Figure 15 Timing of Resetting the Module 1 Ensure that there is no large capacitance exceeding 10 nF on PWRKEY and RESET_N pins 2 It is recommended to use RESET_N only when you fail to turn off the module with the AT QPOWD or PWRKEY pin NOTE ...

Page 39: ...rs e g 10 pF and 33 pF for filtering out RF interference thus reducing TDD noise The 33 pF capacitor is applied for filtering out RF interference when the module is transmitting at EGSM900 Without placing this capacitor TDD noise could be heard The 10 pF capacitor here is used for filtering out RF interference at DCS1800 Note that the resonant frequency point of a capacitor largely depends on the ...

Page 40: ...es must be routed according to the differential signal layout rule 4 1 2 Microphone Interface Design The microphone channel reference circuit is shown in the following figure MIC_P Differential layout Module 10 pF 33 pF 33 pF 33 pF Electret Microphone 10 pF 10 pF TVS TVS Close to Module MIC_N MIC_BIAS Close to Microphone 2 2uF 100nF 1K 0R 0R 100nF 1K 510R 510R 1 5K 1 5K Figure 16 Reference Design ...

Page 41: ...erial Bus USB interface which complies with the USB 2 0 specification and supports full speed 12 Mbps and high speed 480 Mbps modes The USB interface can only serve as a slave device and is used for AT command communication data transmission software debugging and firmware upgrade Table 10 Functions of the USB Interface Functions Data communication with external AP Y AT command communication Y Dat...

Page 42: ...so as to facilitate debugging and the resistors are not mounted by default To ensure the signal integrity of USB data lines L1 R3 and R4 must be placed close to the module and resistors R3 and R4 should be placed close to each other The extra stubs of trace must be as short as possible When designing the USB interface you should follow the following principles to meet USB 2 0 specification Route t...

Page 43: ...power up and the module will enter download mode when it is turned on In this mode the module supports firmware upgrade over USB interface Table 12 Pin Definition of USB_BOOT Interface The following figure shows a reference circuit of USB_BOOT interface Module USB_BOOT VDD_EXT 4 7K Test point TVS Close to test point GND 2 1 3 Figure 19 Reference Circuit of USB_BOOT Interface Pin Name Pin No I O De...

Page 44: ...th an 8 pin U SIM card connector Pin Name Pin No I O Description Comment USIM1_VDD 43 PO U SIM1 card power supply Either 1 8 V or 3 0 V U SIM card is supported and can be identified automatically by the module USIM1_DATA 45 DIO U SIM1 card data USIM1_CLK 46 DO U SIM1 card clock USIM1_RST 44 DO U SIM1 card reset USIM1_DET 42 DI U SIM1 card hot plug detect 1 8 V power domain If unused keep this pin ...

Page 45: ...llustrated in the following figure Module USIM_VDD GND USIM_RST USIM_CLK USIM_DATA 0R 0R 0R 100 nF GND 33 pF 33 pF 33 pF VCC RST CLK IO VPP GND GND 15K USIM_VDD U SIM Card Connector Figure 21 Reference Circuit of U SIM Interface with a 6 Pin U SIM Card Connector To enhance the reliability and availability of the U SIM card in applications follow the criteria below in U SIM circuit design Place U S...

Page 46: ...vely close it is recommended to add a pull up resistor near the U SIM card connector 4 5 I2C and PCM Interfaces The module provides one I2C interface and one pulse code modulation PCM interface The PCM interface of the module only supports slave mode therefore the clock signal of the codec IC needs to be provided externally Table 13 Pin Definition of I2C and PCM Interfaces The following figure sho...

Page 47: ...can be mounted if there is no codec IC on the bus multiple peripherals can be mounted 4 6 UART Interfaces The module provides three UART interfaces the main UART interface and the debug UART interface and auxiliary UART Their features are described as follows Main UART interface supports 4800 bps 9600 bps 19200 bps 38400 bps 57600 bps 115200 bps 230400 bps 460800 bps and 921600 bps baud rates and ...

Page 48: ...MCU RTS_MCU TXD_MCU DTR_MCU CTS_MCU RXD_MCU VDD_MCU Translator 10K 120K Connect the MCU CTS pin Connect the MCU RTS pin Connect the MCU RXD pin Connect the MCU TXD pin MAIN_RTS 37 DI DTE request to send signal to DCE connect to DTE s RTS open MAIN_RXD 34 DI Main UART receive MAIN_DCD 38 DO Main UART data carrier detect MAIN_TXD 35 DO Main UART transmit MAIN_RI 39 DO Main UART ring indication MAIN_...

Page 49: ...IN_CTS MAIN_DTR MAIN_RI RTS CTS GND GPIO MAIN_DCD Module GPIO EINT VDD_EXT 4 7K GND 1 nF 1 nF Figure 24 Reference Circuit with Transistor Circuit 4 7 ADC Interface The module provides two analog to digital converter ADC interfaces You can use AT QADC 0 to read the voltage value on ADC0 pin AT QADC 1 to read the voltage value on ADC1 See document 2 for more details In order to improve the accuracy ...

Page 50: ...age Range 0 1 VBAT V ADC1 Voltage Range 0 1 VBAT V ADC Resolution 12 bits 1 The input voltage of ADC should not exceed its corresponding voltage range 2 It is prohibited to supply any voltage to ADC pin when VBAT is removed 3 It is recommended to use resistor divider circuit for ADC application 4 If input voltage of ADC interface is designed with a resistor divider circuit the resistance value of ...

Page 51: ... QSCLK 3 Enable PSM AT CFUN 1 Exit airplane mode Pulling the PSM_EINT pin up externally or setting the timer in software will enable the module to exit PSM Pin Name Pin No I O Description Comment SPI_CLK 26 DO SPI clock Just master mode only 1 8 V power domain If unused keep it open SPI_CS 25 DO SPI chip select SPI_DIN 88 DI SPI master mode input SPI_DOUT 64 DO SPI master mode output When the univ...

Page 52: ...RTC power domain A reference circuit is shown in the following figure TVS TVS S1 Module PSM_EXT_INT VRTC 2 2K Close to S1 Figure 25 Reference Circuit of Wake up Module from PSM 4 10 Indication Signal Table 19 Pin Definition of Indication Signal Pin Name Pin No I O Description Comment STATUS 20 DO Indicate the module s operation status 1 8 V power domain If unused keep it open AP_READY 19 DI Applic...

Page 53: ...n Status Activity Indication 4 7K 470K VBAT 2 2K Module NET_STATUS Figure 26 Reference Circuit of Network Status Indication 4 10 2 STATUS The STATUS pin is an open drain output for indicating the module s operation status It will output high level when module is powered ON successfully Pin Name Status Network Status NET_STATUS Flicker slowly 200 ms high 1800 ms low Network searching Flicker quickl...

Page 54: ...hysical command can be used to configure MAIN_RI behavior No matter on which port a URC is presented the URC will trigger the behavior of MAIN_RI In addition MAIN_RI behavior can be configured flexibly The default behavior of the MAIN_RI is shown as below Pin Name Pin No I O Description Comment The URC can be outputted via UART port USB AT port and USB modem port which can be set by AT QURCCFG com...

Page 55: ...plane mode is disabled by default and AT QCFG airplanecontrol 1 can be used to enable the function AT CFUN fun command provides the choice of the functionality level through setting fun into 0 1 or 4 AT CFUN 0 Minimum functionality mode RF functions are disabled AT CFUN 1 Full functionality mode by default AT CFUN 4 RF function is disabled Airplane mode State Response Idle MAIN_RI keeps at high le...

Page 56: ...finition of RF Antennas 5 1 2 Operating Frequency Table 25 Operating Frequency of EG915U CN Pin Name Pin No I O Description Comment ANT_MAIN 60 AIO Main antenna interface 50 Ω impedance ANT_BT WIFI_SCAN 56 AIO The shared interface for Bluetooth and Wi Fi Scan Bluetooth and Wi Fi Scan cannot be used simultaneously Wi Fi Scan can only receive but not transmit 50 Ω impedance If unused keep it open On...

Page 57: ...E B34 2010 2025 2010 2025 LTE B38 2570 2620 2570 2620 LTE B39 1880 1920 1880 1920 LTE B40 2300 2400 2300 2400 LTE B41 2535 2675 2535 2675 Operating Frequency Transmit MHz Receive MHz GSM850 824 849 869 894 PCS1900 1850 1910 1930 1990 EGSM900 880 915 925 960 DCS1800 1710 1785 1805 1880 LTE B1 1920 1980 2110 2170 LTE B3 1710 1785 1805 1880 LTE B5 824 849 869 894 LTE B7 2500 2570 2620 2690 LTE B8 880...

Page 58: ...ype matching circuit should be reserved for better RF performance The capacitors are not mounted by default Operating Frequency Transmit MHz Receive MHz GSM850 824 849 869 894 PCS1900 1850 1910 1930 1990 EGSM900 880 915 925 960 DCS1800 1710 1785 1805 1880 LTE B2 1850 1910 1930 1990 LTE B3 1710 1785 1805 1880 LTE B4 1710 1755 2110 2155 LTE B5 824 849 869 894 LTE B7 2500 2570 2620 2690 LTE B8 880 91...

Page 59: ...hould be controlled as 50 Ω The impedance of the RF traces is usually determined by the trace width W the materials dielectric constant the height from the reference ground to the signal layer H and the spacing between the RF traces and the ground S Microstrip or coplanar waveguide is typically used in RF layout to control characteristic impedance The following are reference designs of microstrip ...

Page 60: ...Waveguide Design on a 2 layer PCB Figure 31 Coplanar Waveguide Design on a 4 layer PCB Layer 3 as Reference Ground Figure 32 Coplanar Waveguide Design on a 4 layer PCB Layer 4 as Reference Ground To ensure RF performance and reliability follow the principles below in RF layout design ...

Page 61: ...plete Meanwhile adding some ground vias around RF traces and the reference ground could help to improve RF performance The distance between the ground vias and RF traces should be no less than two times the width of RF signal traces 2 W Keep RF traces away from interference sources and avoid intersection and paralleling between traces on adjacent layers For more details about RF layout see documen...

Page 62: ... 91 Figure 33 Dimensions of U FL R SMT Connector Unit mm U FL LP serial connectors listed in the following figure can be used to match the U FL R SMT Figure 34 Mechanicals of U FL LP Connectors The following figure describes the space factor of mated connector ...

Page 63: ...LTE Standard Module Series EG915U_Series_Hardware_Design 62 91 Figure 35 Space Factor of Mated Connector Unit mm For more details please visit http hirose com ...

Page 64: ...atings Table 29 The Module s Power Supply Ratings Parameter Min Max Unit VBAT_RF VBAT_BB 0 3 6 0 V USB_VBUS 0 3 5 5 V Peak Current of VBAT_BB 0 1 0 A Peak Current of VBAT_RF 0 2 5 A Voltage on Digital Pins 0 3 2 3 V Voltage at ADC0 0 VBAT V Voltage at ADC1 0 VBAT V Parameter Description Conditions Min Typ Max Unit VBAT VBAT_BB and VBAT_RF The actual input voltages must stay between the minimum and...

Page 65: ...SMS data transmission etc There is no unrecoverable malfunction There are also no effects on radio spectrum and no harm to radio network Only one or more parameters like Pout might reduce in their value and exceed the specified tolerances When the temperature returns to the normal operating temperature levels the module will meet 3GPP specifications again Voltage drop during peak data rate mV IVBA...

Page 66: ...D PF 64 USB disconnected 1 8 mA LTE FDD PF 64 USB connected 3 0 mA LTE FDD PF 128 USB disconnected 1 4 mA LTE FDD PF 256 USB disconnected 1 2 mA LTE TDD PF 32 USB disconnected 2 5 mA LTE TDD PF 64 USB disconnected 1 8 mA LTE TDD PF 64 USB connected 3 1 mA LTE TDD PF 128 USB disconnected 1 4 mA LTE TDD PF 256 USB disconnected 1 2 mA Idle state EGSM DRX 5 USB disconnected 12 2 mA EGSM DRX 5 USB conn...

Page 67: ...L 30 86 dBm 343 mA GSM900 2DL 3UL 28 81 dBm 392 mA GSM900 1DL 4UL 26 63 dBm 405 mA DCS1800 4DL 1UL 30 13 dBm 160 mA DCS1800 3DL 2UL 28 12 dBm 221 mA DCS1800 2DL 3UL 26 01 dBm 249 mA DCS1800 1DL 4UL 23 94 dBm 258 mA GSM voice call GSM900 PCL 5 32 83 dBm 245 mA GSM900 PCL 12 18 94 dBm 90 mA GSM900 PCL 19 6 18 dBm 63 mA DCS1800P CL 0 30 12 dBm 176 mA DCS1800P CL 7 15 97 dBm 75 mA DCS1800P CL 15 0 28 ...

Page 68: ...T CFUN 4 USB connected 2 21 mA EGSM DRX 2 USB disconnected 2 09 mA EGSM DRX 5 USB disconnected 1 55 mA EGSM DRX 5 USB connected 2 67 mA EGSM DRX 9 USB disconnected 1 39 mA DCS DRX 2 USB disconnected 2 1 mA DCS DRX 5 USB disconnected 1 5 mA DCS DRX 5 USB connected 2 78 mA DCS DRX 9 USB disconnected 1 36 mA LTE FDD PF 32 USB disconnected 3 49 mA LTE FDD PF 64 USB disconnected 2 22 mA LTE FDD PF 64 U...

Page 69: ... 05 dBm 516 mA LTE FDD B28 23 06 dBm 559 mA GPRS data transfer GSM850 4DL 1UL 32 96 dBm 266 mA GSM850 3DL 2UL 30 7 dBm 394 mA GSM850 2DL 3UL 28 66 dBm 457 mA GSM850 1DL 4UL 26 41 dBm 464 mA GSM900 4DL 1UL 32 31 dBm 245 mA GSM900 3DL 2UL 30 7 dBm 371 mA GSM900 2DL 3UL 28 66 dBm 445 mA GSM900 1DL 4UL 26 63 dBm 452 mA DCS1800 4DL 1UL 29 84 dBm 171 mA DCS1800 3DL 2UL 27 89 dBm 242 mA DCS1800 2DL 3UL 2...

Page 70: ... 7 15 96 dBm 91 mA DCS1800P CL 15 0 95 dBm 75 mA PCS1900P CL 0 29 66 dBm 193 mA PCS1900P CL 7 15 59 dBm 93 mA PCS1900P CL 15 0 58 dBm 75 mA GSM voice call Max Current GSM850 PCL 5 32 82 dBm 1 88 A GSM850 PCL 12 19 08 dBm 0 46 A GSM850 PCL 19 6 12 dBm 0 19 A GSM900 PCL 5 32 34 dBm 1 72 A GSM900 PCL 12 19 06 dBm 0 44 A GSM900 PCL 19 5 39 dBm 0 19 A DCS1800P CL 0 29 89 dBm 1 13 A DCS1800P CL 7 15 96 ...

Page 71: ...X 5 USB connected 3 07 mA EGSM DRX 9 USB disconnected 1 47 mA DCS DRX 2 USB disconnected 2 22 mA DCS DRX 5 USB disconnected 1 63 mA DCS DRX 5 USB connected 3 03 mA DCS DRX 9 USB disconnected 1 48 mA LTE FDD PF 32 USB disconnected 3 54 mA LTE FDD PF 64 USB disconnected 2 25 mA LTE FDD PF 64 USB connected 3 74 mA LTE FDD PF 128 USB disconnected 1 61 mA LTE FDD PF 256 USB disconnected 1 32 mA Idle st...

Page 72: ...2DL 3UL 28 66 dBm 463 mA GSM850 1DL 4UL 26 41 dBm 473 mA GSM900 4DL 1UL 32 31 dBm 257 mA GSM900 3DL 2UL 30 7 dBm 372 mA GSM900 2DL 3UL 28 66 dBm 456 mA GSM900 1DL 4UL 26 63 dBm 452 mA DCS1800 4DL 1UL 29 84 dBm 174 mA DCS1800 3DL 2UL 27 89 dBm 244 mA DCS1800 2DL 3UL 25 85 dBm 270 mA DCS1800 1DL 4UL 23 78 dBm 280 mA PCS1900 4DL 1UL 29 68 dBm 179 mA PCS1900 3DL 2UL 27 74 dBm 250 mA PCS1900 2DL 3UL 25...

Page 73: ...ble 35 EG915U EU RF Output Power Frequency Bands Max RF Output Power Min RF Output Power GSM850 EGSM900 33 dBm 2 dB 5 dBm 5 dB DCS1800 PCS1900 30 dBm 2 dB 0 dBm 5 dB LTE FDD B1 B3 B5 B7 B8 B20 B28 23 dBm 2 dB 39 dBm GSM900 PCL 5 32 34 dBm 261 mA GSM900 PCL 12 19 06 dBm 112 mA GSM900 PCL 19 5 39 dBm 79 mA DCS1800P CL 0 29 89 dBm 187 mA DCS1800P CL 7 15 96 dBm 91 mA DCS1800P CL 15 0 95 dBm 72 mA PCS...

Page 74: ...39 dBm 6 6 Rx Sensitivity Table 37 EG915U CN Conducted RF Receiving Sensitivity Frequency Receiving Sensitivity Typ 3GPP SIMO Primary Primary Diversity EGSM900 108 0 102 dBm DCS1800 107 5 102 dBm LTE FDD B1 10 MHz 97 3 96 3 dBm LTE FDD B3 10 MHz 98 93 3 dBm LTE FDD B5 10 MHz 99 94 3 dBm LTE FDD B8 10 MHz 99 93 3 dBm LTE TDD B34 10 MHz 98 96 3 dBm LTE TDD B38 10 MHz 97 6 96 3 dBm LTE TDD B39 10 MHz...

Page 75: ...02 dBm PCS1900 107 102 dBm LTE FDD B1 10 MHz 97 96 3 dBm LTE FDD B3 10 MHz 98 3 93 3 dBm LTE FDD B5 10 MHz 97 4 94 3 dBm LTE FDD B7 10 MHz 96 1 94 3 dBm LTE FDD B8 10 MHz 97 93 3 dBm LTE FDD B20 10 MHz 98 3 93 3 dBm LTE FDD B28 10 MHz 98 6 94 8 dBm Frequency Receiving Sensitivity Typ 3GPP SIMO Primary Primary Diversity GSM850 108 102 dBm EGSM900 106 8 102 dBm DCS1800 107 5 102 dBm PCS1900 107 2 10...

Page 76: ...le adding ESD protective component to the ESD sensitive interfaces and points in the product design of the module The following table shows the electrostatics discharge characteristics of the module Table 40 Electrostatics Discharge Characteristics 25 C 45 Relative Humidity LTE FDD B5 10 MHz 97 4 94 3 dBm LTE FDD B7 10 MHz 96 1 94 3 dBm LTE FDD B8 10 MHz 97 5 93 3 dBm LTE TDD B28 10 MHz 99 4 93 3 ...

Page 77: ...anical Information This chapter describes the mechanical dimensions of the module All dimensions are measured in millimeter mm and the dimensional tolerances are 0 2 mm unless otherwise specified 7 2 Mechanical Dimensions Figure 36 Module Top and Side Dimensions Unit mm ...

Page 78: ...LTE Standard Module Series EG915U_Series_Hardware_Design 77 91 Figure 37 Module Bottom Dimensions The package warpage level of the module conforms to the JEITA ED 7306 standard NOTE ...

Page 79: ...ded Footprint Figure 38 Recommended Footprint TOP View 1 For easy maintenance of the module keep about 3 mm between the module and other components on the motherboard 2 To keep the reliability of the mounting and soldering keep the motherboard thickness as at least 1 2 mm NOTE ...

Page 80: ...Design 79 91 7 3 Top and Bottom Views Figure 39 Top Bottom Views of the Module Images above are for illustration purpose only and may differ from the actual module For authentic appearance and label please refer to the module received from Quectel NOTE ...

Page 81: ...han 10 e g a drying cabinet 4 The module should be pre baked to avoid blistering cracks and inner layer separation in PCB under the following circumstances The module is not stored in Recommended Storage Condition Violation of the third requirement above occurs Vacuum sealed packaging is broken or the packaging has been removed for over 24 hours Before module repairing 5 If needed the pre baking s...

Page 82: ...he paste fill the stencil openings and then penetrate to the PCB Apply proper force on the squeegee to produce a clean stencil surface on a single pass To ensure the module soldering quality the thickness of stencil for the module is recommended to be 0 18 0 20 mm For more details see document 4 The peak reflow temperature should be 235 246 º C with 246 º C as the absolute maximum reflow temperatu...

Page 83: ...cessary for the module do NOT use any coating material that may chemically react with the PCB or shielding cover and prevent the coating material from flowing into the module 4 Avoid using ultrasonic technology for module cleaning since it can damage crystals inside the module 5 Due to the complexity of the SMT process please contact Quectel Technical Supports in advance for any situation that you...

Page 84: ...5U_Series_Hardware_Design 83 91 The figures below show the package details measured in mm Figure 41 Tape Specifications Table 39 Tape Size mm Figure 42 Reel Specifications W P T A0 B0 K0 K1 F E 44 32 0 35 20 2 24 3 15 6 65 20 2 1 75 ...

Page 85: ...arrier tape and use the cover tape to cover it then wind the heat sealed carrier tape to the plastic reel and use the protective tape for protection 1 plastic reel can load 250 modules Place the packaged plastic reel humidity indicator card and desiccant bag into a vacuum bag vacuumize it Place the vacuum packed plastic reel into the pizza box ...

Page 86: ...LTE Standard Module Series EG915U_Series_Hardware_Design 85 91 Put 4 packaged pizza boxes into 1 cartoon box and seal it 1 cartoon box can pack 1000 modules Figure 43 Packaging Process ...

Page 87: ...ands_Manual 3 Quectel_RF_Layout_Application_Note 4 Quectel_Module_SMT_User_Guide Abbreviation Description ADC Analog to Digital Converter AMR WB Adaptive Multi Rate Wideband AON Active Optical Network AP Application Processor bps Bits Per Second BPSK Binary Phase Shift Keying BW Bandwidth CA Carrier Aggregation CHAP Challenge Handshake Authentication Protocol CS Coding Scheme CSD Circuit Switched ...

Page 88: ...ontinuous Reception DRX Diversity Receive DTE Data Terminal Equipment DTR Data Terminal Ready EFR Enhanced Full Rate ESD Electrostatic Discharge FDD Frequency Division Duplex FEM Front End Module FR Full Rate GLONASS Global Navigation Satellite System Russia GMSK Gaussian Minimum Shift Keying GNSS Global Navigation Satellite System GPS Global Positioning System GRFC General RF Control HB High Band...

Page 89: ...ormal Current LAA License Assisted Access LB Low Band LED Light Emitting Diode LGA Land Grid Array LMHB Low Middle High Band LNA Low Noise Amplifier LTE Long Term Evolution MAC Media Access Control MB Middle Band MCU Microcontroller Unit MDC Management Data Clock MDIO Management Data Input Output MHB Middle High Band MIMO Multiple Input Multiple Output MO Mobile Originated MS Mobile Station MT Mob...

Page 90: ...igital Assistant PDU Protocol Data Unit PHY Physical Layer PMIC Power Management Integrated Circuit PRX Primary Receive QAM Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying QZSS Quasi Zenith Satellite System RI Ring Indicator RF Radio Frequency RGMII Reduced Gigabit Media Independent Interface RHCP Right Hand Circularly Polarized Rx Receive SA Stand Alone SCS Sub Carrier Space SD...

Page 91: ...nchronous Receiver Transmitter UHB Ultra High Band UL Uplink UMTS Universal Mobile Telecommunications System URC Unsolicited Result Code USB Universal Serial Bus U SIM Universal Subscriber Identity Module VBAT Voltage at Battery Pin Vmax Maximum Voltage Value Vnom Nominal Voltage Value Vmin Minimum Voltage Value VIHmax Maximum Input High Level Voltage Value VIHmin Minimum Input High Level Voltage ...

Page 92: ...imum Output High Level Voltage Value VOHmin Minimum Output High Level Voltage Value VOLmax Maximum Output Low Level Voltage Value VOLmin Minimum Output Low Level Voltage Value VSWR Voltage Standing Wave Ratio WCDMA Wideband Code Division Multiple Access WLAN Wireless Local Area Network WWAN Wireless Wide Area Network ...

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