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General| Brand | SIM Tech |
|---|---|
| Model | SIMCom SIM868 Series |
| Category | GSM/GPRS Modules |
| Language | English |
Details the primary features and specifications of the SIM868 module for GSM operations.
Describes the different operational states the GSM part of the SIM868 module can enter.
Illustrates the internal block diagram of the SIM868 module, showing key components.
Visual representation of all pin assignments for the SIM868 module.
Detailed explanation of each pin's function and I/O type on the SIM868 module.
Provides the physical dimensions and outlines for the SIM868 module package.
Describes the operational mode where GSM and GNSS work together using shared UART.
Details the operational mode where GSM and GNSS parts function independently.
Explains the required power supply voltage and current for the GSM functionality.
Provides reference schematics for designing the GSM power supply circuit.
Details the procedures and signals for powering the GSM portion of the module on and off.
Covers methods to reduce power consumption for the GSM module, including sleep modes.
Describes the capabilities and pin assignments of the GSM module's serial communication ports.
Illustrates the connections for the serial interfaces between the module and a client device.
Explains how to use the USB port for debugging and firmware updates.
Outlines methods for upgrading the GSM firmware via USB or UART interfaces.
Details the behavior and responses of the UART1 Ring Indicator (RI) pin.
Provides reference circuits for connecting speakers to the module.
Offers reference circuits for connecting microphones to the module.
Lists the electrical characteristics for the microphone input and audio output.
Discusses methods to mitigate TDD noise affecting audio signals.
Describes how to connect and use a SIM card with the module.
Provides guidelines for designing the PCB layout for the SIM card interface.
Details design considerations and recommended components for SIM card holders.
Shows the recommended reference circuit for connecting an SD card.
Lists the pin assignments and functions for the I2C interface.
Defines the pin used for analog-to-digital conversion and its function.
Details the electrical specifications and performance characteristics of the ADC.
Defines the NETLIGHT pin used for indicating network status.
Explains the different states indicated by the NETLIGHT pin.
Defines the STATUS pin used for indicating the module's operating status.
Describes the RF_SYNC pin and its role in indicating transmit bursts.
Provides reference circuits for matching the GSM antenna impedance.
Lists recommended Transient Voltage Suppressor (TVS) components for ESD protection.
Shows the reference circuit for matching the Bluetooth antenna.
Details current consumption figures for BLE operation with CSCLK enabled.
Details current consumption figures for BLE operation with CSCLK disabled.
Provides an overview of the GNSS capabilities and features of the SIM868 module.
Explains the required power supply voltage and current for the GNSS functionality.
Describes how to provide backup power to maintain the GNSS RTC.
Details the procedures and signals for powering the GNSS portion of the module on and off.
Defines the serial port pin assignments and characteristics for GNSS communication.
Outlines methods for upgrading the GNSS firmware via UART interface.
Explains the 1PPS output signal for precise timing applications.
Describes passive antennas and provides a matching circuit diagram for GNSS.
Describes active antennas and provides a matching circuit diagram for GNSS.
Details the GNSS operating mode where it is continuously active.
Explains the low-power stop mode for the GNSS module.
Describes the backup mode for maintaining GNSS RTC with low power.
Explains how to set up periodic power on/off cycles for GNSS.
Details the intelligent adaptive power management mode for GNSS.
Describes the GNSS Low Power (GLP) mode for reduced power consumption.
Explains the Easy Mode for A-GPS, accelerating time-to-first-fix.
Details the EPO (Extended Prediction Orbit) data service for A-GPS.
Describes the Fast-Fix technology using EPO data for faster acquisition.
Explains the Multi-tone Active Interference Canceller for GNSS.
Introduces the Satellite Based Augmentation System for GNSS.
Provides an overview of the module's pin assignments for PCB layout planning.
Offers general guidelines for PCB layout to minimize interference and noise.
Guidelines for laying out the RF antenna interface for optimal performance.
Recommendations for laying out power supply traces (VBAT and GND).
Guidelines for laying out the SIM card interface to avoid interference.
Guidelines for laying out audio traces to minimize noise and interference.
Specifies the absolute maximum electrical stress limits to prevent damage to the module.
Defines the recommended voltage, temperature, and other operating parameters.
Details the electrical characteristics for digital input/output interfaces.
Lists the electrical characteristics specific to the SIM card interface.
Provides output voltage and current characteristics for the SIM_VDD power supply.
Details the output voltage and current characteristics of the VDD_EXT supply.
Shows current consumption values under various operating conditions.
Presents test results for ESD susceptibility on various module pins.
Details the conducted RF output power for different GSM bands and power levels.
Specifies the conducted RF receive sensitivity across different frequency bands.
Lists the operating frequency ranges for receive and transmit in different GSM bands.
Shows visual representations of the top and bottom sides of the SIM868 module.
Illustrates the recommended temperature profile for solder reflow during assembly.
Details the moisture sensitivity level (MSL) and floor life of the module.
Specifies baking procedures required to prevent moisture damage before soldering.
Illustrates the different packaging stages for the SIM868 module.
Shows the drawing and dimensions of the module tray used for packaging.
Lists the dimensions of the module trays used in packaging.
Provides the dimensions of the small cartons used for packaging.
Provides the dimensions of the big cartons used for packaging.
Lists related documents and manuals for further information on the SIM868 module.
Defines common terms and abbreviations used throughout the document.
Provides essential safety precautions for using the cellular terminal and mobile devices.
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