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Quectel EG915U-EU Manual

Quectel EG915U-EU Manual

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EG915U-EU
Hardware Design
LTE Standard Module Series
Version: 1.0.0
Date: 2021-06-24
Status: Preliminary

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Summary of Contents for Quectel EG915U-EU

  • Page 1 EG915U-EU Hardware Design LTE Standard Module Series Version: 1.0.0 Date: 2021-06-24 Status: Preliminary...
  • Page 2 To the maximum extent permitted by law, Quectel excludes all liability for any loss or damage suffered in connection with the use of the functions and features under development, regardless of whether such loss or damage may have been foreseeable.
  • Page 3 LTE Standard Module Series Copyright The information contained here is proprietary technical information of Quectel Wireless Solutions Co., Ltd. Transmitting, reproducing, disseminating and editing this document as well as using the content without permission are forbidden. Offenders will be held liable for payment of damages. All rights are reserved in the event of a patent grant or registration of a utility model or design.

  • Page 4: Safety Information

    Manufacturers of the cellular terminal should notify users and operating personnel of the following safety information by incorporating these guidelines into all manuals of the product. Otherwise, Quectel assumes no liability for customers’ failure to comply with these precautions.

  • Page 5: About The Document

    LTE Standard Module Series About the Document Revision History Version Date Author Description 2021-06-24 Kexiang ZHANG/Len CHEN Creation of the document 1.0.0 2021-06-24 Kexiang ZHANG/Len CHEN Preliminary EG915U-EU_Hardware_Design 4 / 81...

  • Page 6: Table Of Contents

    LTE Standard Module Series Contents Safety Information ............................3 About the Document ........................... 4 Table Index ..............................7 Figure Index ..............................8 Introduction ............................10 1.1. Special Mark ..........................10 Product Overview ..........................11 2.1. Frequency Bands and Functions .................... 12 2.2.
  • Page 7 LTE Standard Module Series 4.6. UART Interface ........................46 4.7. ADC Interface .......................... 49 4.8. SPI Interface ..........................50 4.9. Control Signal .......................... 50 4.9.1. W_DISABLE# ......................... 51 4.10. Indication Signal ........................51 4.10.1. Network Status Indication ..................51 4.10.2. STATUS ........................
  • Page 8 Table 25: Operating Frequency of EG915U-EU ..................54 Table 26: Tx Power ............................. 55 Table 27: Conducted RF Receiving Sensitivity of EG915U-EU ..............55 Table 28: Pin Definition of GRFC Interfaces ....................57 Table 29: Logic Levels of GRFC Interfaces ....................57 Table 30: Truth Table of GRFC Interfaces ....................
  • Page 9 LTE Standard Module Series Figure Index Figure 1: EG915U-EU Functional Diagram ....................15 Figure 2: EG915U-EU Pin Assignment (Top View) ..................16 Figure 3: Sleep Mode Application via UART ....................27 Figure 4: Sleep Mode Application with USB Remote Wakeup ..............28 Figure 5: Sleep Mode Application with RI ....................
  • Page 10 LTE Standard Module Series Figure 42: Tape and Reel Directions ......................75 EG915U-EU_Hardware_Design 9 / 81...

  • Page 11: Introduction

    LTE Standard Module Series Introduction This document defines the EG915U-EU module and describes its air interfaces and hardware interfaces which relate to customers’ applications. It can help customers quickly understand interface specifications, electrical and mechanical details, as well as other 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.

  • Page 12: Product Overview

    LTE/GSM/Bluetooth/Wi-Fi Scan NOTE 1. The Bluetooth and Wi-Fi Scan functions of the EG915U-EU are integrated, but the Bluetooth and Wi-Fi Scan functions cannot be used at the same time, and only one of them can be selected. 2. EG915U-EU supports Bluetooth and Wi-Fi functions. Because of common antenna interfaces, two functions cannot be used at the same time: Bluetooth and Wi-Fi are optional (both supported or not).

  • Page 13: Frequency Bands And Functions

    LTE Standard Module Series 2.1. Frequency Bands and Functions Table 3: Wireless Network Type Wireless Network Type EG915U-EU LTE-FDD B1/B3/B5/B7/B8/B20/B28 850/900/1800/1900 MHz Bluetooth/Wi-Fi Scan 2.4 GHz Optional. EG915U-EU_Hardware_Design 12 / 81...

  • Page 14: Key Features

    LTE Standard Module Series 2.2. Key Features Table 4: Key Features Features Details ⚫ Supply voltage: 3.3 V-4.3 V Power Supply ⚫ Typical supply voltage: 3.8 V ⚫ Text and PDU mode. ⚫ Point-to-point MO and MT. ⚫ SMS cell broadcast. ⚫...
  • Page 15 LTE Standard Module Series Auxiliary UART Network Indication NET_STATUS to indicate network connectivity status. Compliant with 3GPP TS 27.007, 27.005 and Quectel AT Commands enhanced AT commands. ⚫ ANT_MAIN ⚫ Bluetooth and Wi-Fi Scan antenna interface Antenna Interface (ANT_BT/WIFI_SCAN) ⚫...

  • Page 16: Functional Diagram

    ANT_BT/WIFI_SCAN Duplex VBAT_RF VBAT_BB 26 MHz Transceiver DCXO 32 kHz Clock PWRKEY RESET_N PMIC Control Baseband Control ADCs SPI Nor Flash (64Mb) PSRAM (128Mb) VDD_EXT 2x(U)SIM UARTs STATUS Figure 1: EG915U-EU Functional Diagram 2.4. Pin Assignment EG915U-EU_Hardware_Design 15 / 81...
  • Page 17 PCM Pins RESERVED Pins UART2 Pins UART1 Pins Figure 2: EG915U-EU Pin Assignment (Top View) NOTE USB_BOOT cannot be pulled up before the module startup. Keep NC and RESERVED pins unconnected, all GND pins shall be connected to the ground.

  • Page 18: Pin Description

    LTE Standard Module Series 2.5. Pin Description The following table shows the DC characteristics and pin descriptions. Table 5: I/O Parameters Definition Type Description Analog Input Analog Input/Output Digital Input Digital Output Digital Input/Output Open Drain Power Input Power Output Table 6: Pin Description Power Supply Pin Name...
  • Page 19 LTE Standard Module Series when in use. If unused, keep it open. Turn On/Off Pin Name Pin No. Description Comment Characteristics VBAT power PWRKEY Turn on/off the module domain. VBAT power max = 0.5 V domain. RESET_N Reset the module If unused, keep it open.
  • Page 20 LTE Standard Module Series (U)SIM Interface Pin Name Pin No. Description Comment Characteristics max = 50 mA For 1.8 V Either 1.8 V or (U)SIM: 3.0 V (U)SIM Vmax = 1.9 V card is (U)SIM1 card power USIM1_VDD Vmin = 1.7 V supported and supply can be identified...
  • Page 21 LTE Standard Module Series max = 0.45 V min = 2.55 V min = -0.3 V 1.8 V power (U)SIM1 card hot-plug max = 0.6 V domain. If USIM1_DET detect min = 1.26 V unused, keep max = 2.0 V this pin open Specified ground USIM1_GND...
  • Page 22 LTE Standard Module Series max = 2.0 V this pin open Main UART Interface Pin Name Pin No. Description Comment Characteristics max = 0.45 V MAIN_CTS Main UART clear to send min = 1.35 V min = -0.3 V Main UART request to max = 0.6 V MAIN_RTS send...
  • Page 23 LTE Standard Module Series max = 2.0 V open. max = 0.45 V DBG_TXD Debug UART receive min = 1.35 V I2C Interface Pin Name Pin No. Description Comment Characteristics I2C serial clock (for External pull-up I2C_SCL external codec) resistor is required.
  • Page 24 LTE Standard Module Series min = -0.3 V max = 0.6 V PCM_DIN PCM data input min = 1.26 V max = 2.0 V max = 0.45 V PCM_DOUT PCM data output min = 1.35 V RF Antenna Interface Pin Name Pin No.
  • Page 25 LTE Standard Module Series Pin Name Pin No. Description Comment Characteristics 1.8 V power domain. Active high. min = -0.3 V Force the module into A circuit that max = 0.6 V USB_BOOT emergency download enables the min = 1.2 V mode module to enter max = 2.0 V...

  • Page 26: Evb

    106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 123, 124, 125 2.6. EVB In order to help customers to develop applications with the module conveniently, Quectel supplies an evaluation board (UMTS&LTE EVB), USB data cable, earphone, antenna, and other peripherals to control or to test the module.

  • Page 27: Operating Characteristics

    LTE Standard Module Series Operating Characteristics 3.1. Operating Modes The table below outlines operating modes of the module. Table 7: Overview of Operating Modes Mode Details Software is active. The module is registered on the network Idle and ready to send and receive data. Normal Operation Network connection is ongoing.

  • Page 28: Sleep Mode

    LTE Standard Module Series 3.2. Sleep Mode EG915U-EU is able to reduce its current consumption to an ultra-low value in the sleep mode. The following section describes power saving procedures of EG915U-EU module. 3.2.1. UART Application Scenario If the host communicates with the module via UART interface, all the following two preconditions should be met to set the module enter into sleep mode: ⚫...

  • Page 29: Usb Application With Usb Remote Wakeup Function

    LTE Standard Module Series 3.2.2.1. USB Application with USB Remote Wakeup Function* The host supports USB Suspend/Resume and remote wakeup function. The figure illustrates the connection between the module and the host. Host Module USB_VBUS USB_DP USB_DP USB_DM USB_DM GPIO AP_READY Figure 4: Sleep Mode Application with USB Remote Wakeup ⚫...

  • Page 30: Usb Application With Usb Suspend/Resume And Ri Function

    LTE Standard Module Series 3.2.2.2. USB Application with USB Suspend/Resume and RI Function If the host supports USB Suspend/Resume, but does not support remote wakeup function, the RI signal is needed to wake up the host. The following figure illustrates the connection between the module and the host. Module Host USB_VBUS...

  • Page 31: Power Supply

    3.4. Power Supply 3.4.1. Power Supply Pins EG915U-EU power pins are used to connect an external power, supply power to the RF and BB circuits of the module. The following table shows the details of power supply and GND pins.

  • Page 32: Reference Design For Power Supply

    LTE Standard Module Series 3.4.2. Reference Design for Power Supply The performance of the module largely depends on the power source. The power supply of the module should be able to provide sufficient current of 3.0 A at least. If the voltage drops between input and output is not too high, it is suggested that an LDO should be used to supply power to the module.
  • Page 33 LTE Standard Module Series voltage source and can be expanded to two sub paths with the star structure. The width of VBAT_BB trace should be no less than 2.0 mm. The width of VBAT_RF trace should be no less than 2.5 mm. In principle, the longer the VBAT trace is, the wider it will be.

  • Page 34: Turn On

    LTE Standard Module Series 3.5. Turn On 3.5.1. Turn on the Module with PWRKEY Table 9: Pin Definition of PWRKEY Pin Name Pin No. Description Comment PWRKEY Turn on/off the module VBAT power domain. When the module is in power off mode, it can be turned on and enter normal operation mode by driving the PWRKEY low for at least 2 s.

  • Page 35: Turn Off

    LTE Standard Module Series The turn on scenario is illustrated in the following figure. Note 1 ≥ 2 s VBAT ≤ 0.5 V PWRKEY About 1.15 s VDD_EXT RESET_N ≥ 4 s UART I nactive Active ≥ 2.23 s I nactive Active Figure 11: Power-on Timing NOTE...

  • Page 36: Turn Off The Module With Pwrkey

    LTE Standard Module Series 3.6.1. Turn off the Module with PWRKEY Driving the PWRKEY to a low-level voltage for at least 3 s, then the module will execute power-down procedure after the PWRKEY is released. VBA T 30 s PWRKEY Module Power-down procedure Running...

  • Page 37: Reset

    LTE Standard Module Series 3.7. Reset The module can be reset by driving the RESET_N low for at least 100 ms and then releasing it. The RESET_N signal is sensitive to interference, so it is recommended to route the trace as short as possible and surround it with ground.
  • Page 38 LTE Standard Module Series VBAT ≥ 100 ms RESET_N ≤ 0.5 V Module Running Baseband restart Baseband resetting Status Figure 15: Reset Timing ⚫ NOTE Please ensure that there is no large capacitance with the max value exceeding 10 nF on PWRKEY and RESET_N pins.

  • Page 39: Application Interfaces

    LTE Standard Module Series Application Interfaces 4.1. Analog Audio Interfaces Table 11: Pin Definition of Audio Interfaces Pin Name Pin No. Description MIC_N Microphone analog input (-) MICBIAS Bias voltage output for microphone SPK_P Analog audio differential output (+) SPK_N Analog audio differential output (-) MIC_P Microphone analog input (+)

  • Page 40: Microphone Interface Design

    LTE Standard Module Series should be far away from the audio traces. The differential audio traces 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. Close to Close to Module Microphone...

  • Page 41: Receiver Interface Design

    Figure 17: Reference Design for Receiver Interface 4.2. USB Interface EG915U-EU provides one integrated Universal Serial 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.
  • Page 42 LTE Standard Module Series Voice over USB Pin definition of the USB interface is here as follows: Table 13: Pin Definition of USB Interface Pin Name Pin No. Description Comment Typical 5.0 V USB_VBUS USB connection detect Minimum 3.5 V USB 2.0 compliant.

  • Page 43: Usb_Boot Interface

    LTE Standard Module Series ⚫ The following principles should be complied with when designing the USB interface, to meet USB specifications. ⚫ It is important to route the USB signal traces as differential pairs with total grounding. The impedance of USB differential trace is 90 Ω. ⚫...

  • Page 44: U)Sim Interface

    USIM2_DET (U)SIM2 card detect EG915U-EU module supports (U)SIM card hot-plug via the USIM_DET pin. The function supports rising edge and falling edge detections. By default, it is disabled, and can be configured via AT+QSIMDET command. Please refer to document [2] for details about the command.
  • Page 45 LTE Standard Module Series The following figure shows a reference design for (U)SIM interface with an 8-pin (U)SIM card connector. VDD_EXT USIM_VDD 100 nF (U)SIM Card Connector USIM_VDD USIM_RST Module USIM_CLK Switch USIM_DET USIM_DATA 33 pF 33 pF 33 pF Figure 20: Reference Circuit of (U)SIM Interface with an 8-Pin (U)SIM Card Connector A reference circuit for (U)SIM card interface with a 6-pin (U)SIM card connector is illustrated in the following figure.

  • Page 46: I2C And Pcm Interfaces

    4.5. I2C and PCM Interfaces EG915U-EU provides one I2C interface and one Pulse Code Modulation (PCM) interface. The PCM interface of EG91U-EU series only supports slave mode, not master mode. Therefore, an external clock must to be provided to the codec.

  • Page 47: Uart Interface

    LTE Standard Module Series The following figure shows a reference design of PCM interface with external codec IC. External 26MHz Crystal MICBIAS MCLK PCM_CLK BCLK PCM_SYNC LRCK PCM_DOUT PCM_DIN LOUTP I2C_SCL I2C_SDA LOUTN Module Codec 1.8 V Figure 22: Reference Circuit of PCM Application with Audio Codec 4.6.
  • Page 48 LTE Standard Module Series MAIN_DCD Main UART data carrier detect MAIN_TXD Main UART transmit MAIN_RI Main UART ring indication MAIN_DTR Main UART data terminal ready AUX_TXD Auxiliary UART transmit AUX_RXD Auxiliary UART receive 1.8 V power domain. DBG_RxD Debug UART transmit If unused, keep it DBG_TxD Debug UART receive...
  • Page 49 LTE Standard Module Series 4.7K VDD_EXT VDD_EXT 1 nF Module MCU/ARM MAIN_RXD MAIN_TXD 1 nF VDD_EXT VCC_MCU 4.7K MAIN_RTS MAIN_CTS GPIO MAIN_DTR EINT MAIN_RI GPIO MAIN_DCD Figure 24: Reference Circuit with Transistor Circuit NOTE Transistor circuit solution is not suitable for applications with baud rates exceeding 460 kbps. Module’s CTS connect to MCU’s CTS, module’s RTS connect to MCU’s RTS.

  • Page 50: Adc Interface

    LTE Standard Module Series 4.7. ADC Interface The module provides 2 Analog-to-Digital Converter (ADC) interface. In order to improve the accuracy of ADC, the trace of ADC interfaces should be surrounded by ground. The module provides four analog-to-digital converter (ADC) interfaces. AT+QADC=0 can be used to read the voltage value on ADC0 pin.

  • Page 51: Spi Interface

    LTE Standard Module Series 4.8. SPI Interface The SPI interface of the EG915U-EU module only supports the master mode. It communicates with peripherals in a synchronous duplex serial manner. It has a working voltage of 1.8 V and a maximum clock frequency of 25 MHz.

  • Page 52: W_Disable

    LTE Standard Module Series 4.9.1. W_DISABLE# ⚫ The module provides a W_DISABLE# pin to enable or disable airplane mode through hardware operation. W_DISABLE# is pulled up by default, and driving it low will set the module to airplane mode. ⚫ The RF function can also be enabled or disabled through software AT commands (when <fun>...

  • Page 53: Status

    LTE Standard Module Series Always Low Others Flicker slowly (200 ms High/1800 ms Low) Network searching Flicker slowly (1800 ms High/200 ms Low) Idle NET_STATUS Data transfer is Flicker quickly (125 ms High/125 ms Low) ongoing Always High Voice calling Module VBAT 2.2K...

  • Page 54: Main_Ri

    LTE Standard Module Series 4.10.3. MAIN_RI AT+QCFG= “risignaltype”, “physical” 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. NOTE The URC can be outputted via UART port, USB AT port and USB modem port, which can be set by AT+QURCCFG command.

  • Page 55: Rf Specifications

    Description Comment ANT_MAIN Main antenna interface 50 Ω impedance Wi-Fi/Bluetooth antenna ANT_BT/WIFI_SCAN interface ⚫ NOTE Only passive antennas are supported. Table 25: Operating Frequency of EG915U-EU Operating Frequency Transmit (MHz) Receive (MHz) GSM850 824-849 869-894 PCS1900 1850-1910 1930-1990 EGSM900 880-915...

  • Page 56: Tx Power

    In GPRS 4 slots Tx mode, the maximum output power is reduced by 6 dB. The design conforms to the GSM specification as described in Chapter 13.16 of 3GPP TS 51.010-1. 5.1.3. Receiving Sensitivity The following table shows conducted RF receiving sensitivity of the module. Table 27: Conducted RF Receiving Sensitivity of EG915U-EU 3GPP Receiving Sensitivity (Typ.) Requirement...

  • Page 57: Reference Design

    LTE Standard Module Series EGSM900 -102 dBm DCS1800 -102 dBm PCS1900 -102 dBm LTE-FDD B1 (10 -96.3 dBm MHz) LTE-FDD B3 (10 -96.3 dBm MHz) LTE-FDD B5 (10 -94.3 dBm MHz) LTE-FDD B7 (10 -94.3 dBm MHz) LTE-FDD B8 (10 -93.3 dBm MHz) LTE-FDD B20 (10...

  • Page 58: Grfc Interfaces

    LTE Standard Module Series 5.1.5. GRFC Interfaces* The module provides two generic RF control interfaces for the control of external antenna tuners. Table 28: Pin Definition of GRFC Interfaces Pin Name Pin No. Description Comment 1.8 V power domain. GRFC1 Generic RF Controller If unused, keep this GRFC2...

  • Page 59: Reference Design Of Rf Routing

    LTE Standard Module Series 5.2. Reference Design of RF Routing For user’s PCB, the characteristic impedance of all RF traces should be controlled to 50 Ω. The impedance of the RF traces is usually determined by the trace width (W), the materials’ dielectric constant, height from the reference ground to the signal layer (H), and the space between RF traces and grounds (S).
  • Page 60 LTE Standard Module Series Figure 30: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) Figure 31: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) In order to ensure RF performance and reliability, the following principles should be complied with in RF layout design: ⚫...

  • Page 61: Requirements For Antenna Design

    LTE Standard Module Series 5.3. Requirements for Antenna Design Table 31: Requirements for Antenna Design Antenna Type Requirements VSWR: ≤ 2 Efficiency: > 30 % Max input power: 50 W Input impedance: 50 Ω Polarization: Vertical GSM/EVDO/CDMA/UMTS/TD-SCDMA/LTE Cable insertion loss: < 1 dB (<...
  • Page 62 LTE Standard Module Series Figure 33: Mechanicals of U.FL-LP Connectors The following figure describes the space factor of mated connector. Figure 34: Space Factor of Mated Connector (Unit: mm) For more details, please visit http://hirose.com. EG915U-EU_Hardware_Design 61 / 81...

  • Page 63: Electrical Characteristics & Reliability

    LTE Standard Module Series Electrical Characteristics & Reliability 6.1. Absolute Maximum Ratings Absolute maximum ratings for power supply and voltage on digital and analog pins of the module are listed in the following table. Table 32: Absolute Maximum Ratings Parameter Min.

  • Page 64: Power Supply Ratings

    Maximum power control level (during VBAT at EGSM 900 transmission slot) USB_VBUS connection 5.25 detection 6.3. Power Consumption Table 34: The Module Power Consumption EG915U-EU Description Conditions Typ. Unit OFF state Power down Sleep state Idle state EG915U-EU_Hardware_Design 63 / 81...

  • Page 65: Esd

    LTE data transfer (GNSS OFF) GPRS data transfer LTE data transfer GSM voice call GPRS data transfer (GNSS OFF) Table 35: The Module GNSS Current Consumption EG915U-EU Description Conditions Typ. Unit Cold Start @ Passive Antenna Searching Hot Start @ Passive...

  • Page 66: Operating And Storage Temperatures

    LTE Standard Module Series VBAT, GND ± TBD ± TBD All Antenna Interfaces ± TBD ± TBD Other Interfaces ± 0.5 ± 1 6.5. Operating and Storage Temperatures Table 37: Operating and Storage Temperatures Parameter Min. Typ. Max. Unit Operating Temperature Range °...

  • Page 67: Mechanical Information

    LTE Standard Module Series Mechanical 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. 7.1. Mechanical Dimensions Figure 35: Module Top and Side Dimensions (Unit: mm) EG915U-EU_Hardware_Design 66 / 81...
  • Page 68 LTE Standard Module Series Figure 36: Module Bottom Dimensions ⚫ NOTE The package warpage level of the module conforms to the JEITA ED-7306 standard. EG915U-EU_Hardware_Design 67 / 81...

  • Page 69: Recommended Footprint

    LTE Standard Module Series 7.2. Recommended Footprint Figure 37: Recommended Footprint (TOP View) NOTE For convenient maintenance of the module, please keep about 3 mm between the module and other components on the host PCB. EG915U-EU_Hardware_Design 68 / 81...

  • Page 70: Top And Bottom Views

    LTE Standard Module Series 7.3. Top and Bottom Views Figure 38: Top & Bottom Views of the Module NOTE These are renderings of the module. For authentic appearance, please refer to the module that you receive from Quectel. EG915U-EU_Hardware_Design 69 / 81...

  • Page 71: Storage, Manufacturing & Packaging

    LTE Standard Module Series Storage, Manufacturing & Packaging 8.1. Storage Conditions The module is provided with vacuum-sealed package. MSL of the module is rated as 3, and its storage restrictions are shown as below. 1. Recommended Storage Condition: The temperature should be 23 ± 5 ° C and the relative humidity should be 35–60 %.
  • Page 72 LTE Standard Module Series NOTE 1. To avoid blistering, layer separation and other soldering issues, it is forbidden to expose the modules to the air for a long time. If the temperature and moisture do not conform to IPC/JEDEC J-STD-033 or the relative moisture is over 60 %, it is recommended to start the solder reflow process within 24 hours after the package is removed.

  • Page 73: Manufacturing And Soldering

    LTE Standard Module Series 8.2. Manufacturing and Soldering Push the squeegee to apply the solder paste on the surface of stencil, thus making the paste fill the stencil openings and then penetrate to the PCB. The force on the squeegee should be adjusted properly to produce a clean stencil surface on a single pass.

  • Page 74: Packaging Specifications

    LTE Standard Module Series Reflow Zone Max slope 2 to 3 ° C/s Reflow time (D: over 220 ° 45 to 70 s Max temperature 238 to 246 ° C Cooling down slope -1 to 4 ° C/s Reflow Cycle Max reflow cycle NOTE 1.
  • Page 75 LTE Standard Module Series Figure 40: Tape Specifications Figure 41: Reel Specifications EG915U-EU_Hardware_Design 74 / 81...
  • Page 76 LTE Standard Module Series Figure 42: Tape and Reel Directions EG915U-EU_Hardware_Design 75 / 81...

  • Page 77: Appendix References

    LTE Standard Module Series Appendix References Table 39: Related Documents Document Name [1] Quectel_UMTS&LTE_EVB_User_Guide [2] Quectel_EG915U-EU_Series_AT_Commands_Manual [3] Quectel_RF_Layout_Application_Note [4] Quectel_Module_SMT_User_Guide Table 40: Terms and Abbreviations Abbreviation Description Analog-to-Digital Converter AMR-WB Adaptive Multi-Rate Wideband Active Optical Network Application Processor Bits Per Second BPSK Binary Phase Shift Keying Bandwidth...
  • Page 78 LTE Standard Module Series Clear To Send Digital Audio Interface Data Communications Equipment DC-HSDPA Dual-carrier High Speed Downlink Packet Access Double Data Rate DFOTA Delta Firmware Upgrade Over The Air Downlink Discontinuous Reception Diversity Receive Data Terminal Equipment Data Terminal Ready Enhanced Full Rate Electrostatic Discharge Frequency Division Duplex...
  • Page 79 LTE Standard Module Series HSPA High Speed Packet Access HSUPA High Speed Uplink Packet Access Integrated Circuit Inter-Integrated Circuit Inter-IC Sound Input/Output Inorm Normal Current License Assisted Access Low Band Light Emitting Diode Land Grid Array LMHB Low/Middle/High Band Low Noise Amplifier Long Term Evolution Media Access Control Middle Band...
  • Page 80 LTE Standard Module Series Non-Stand Alone Power Amplifier Password Authentication Protocol Personal Computer Printed Circuit Board PCIe Peripheral Component Interconnect Express Pulse Code Modulation Personal Digital Assistant Protocol Data Unit Physical Layer PMIC Power Management Integrated Circuit Primary Receive Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying QZSS...
  • Page 81 LTE Standard Module Series Short Message Service System on a Chip Serial Peripheral Interface Set Top Box Time Division Duplexing TDMA Time Division Multiple Access TD-SCDMA Time Division-Synchronous Code Division Multiple Access Transmit & Receive Transmit UART Universal Asynchronous Receiver/Transmitter Ultra High Band Uplink UMTS...
  • Page 82 LTE Standard Module Series Absolute Minimum Input Voltage Value Maximum Output High Level Voltage Value Minimum Output High Level Voltage Value Maximum Output Low Level Voltage Value Minimum Output Low Level Voltage Value VSWR Voltage Standing Wave Ratio WCDMA Wideband Code Division Multiple Access WLAN Wireless Local Area Network WWAN...

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