Sim900D Overview; Sim900D Key Features - SimCom SIM900D Hardware Design

SIM900D Hardware Design

2 SIM900D Overview

Designed for global market, SIM900D is a quad-band GSM/GPRS engine that works on frequencies GSM
850MHz, EGSM 900MHz, DCS 1800MHz and PCS 1900MHz. SIM900D features GPRS multi-slot class 10/
class 8 (optional) and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4.
With a tiny configuration of 33mm x 33mm x 3mm, SIM900D can meet almost all the space requirements in your
applications, such as M2M, smart phone, PDA, FWP, and other mobile devices.
The physical interface to the mobile application is a 48-pin SMT pad, which provides all hardware interfaces
between the module and customers' boards.
Serial port and Debug port can help user easily develop user's applications.
The charge interface is very suitable for the battery power application.
Two audio channels including two microphone inputs and two speakers' outputs can be easily built into
handset, headset and handfree channel.
The SPI display interface and two Programmable General Purpose Input & Output will give users the
flexibility to develop customized applications.
SIM900D is designed with power saving technique so that the current consumption is as low as 1.2mA in SLEEP
mode.
SIM900D is integrated with the TCP/IP protocol. Extended TCP/IP AT commands are developed for customers to
use TCP/IP protocol easily, which is very useful for data transfer applications.
The modules complied with RoHS directive 2002/95/EC

2.1 SIM900D Key Features

Table3: SIM900D key features
Feature
Power supply
Power saving
Frequency Bands
GSM class
Transmitting power
SIM900D_Hardware Design_V1.04
Implementation
Single supply voltage 3.2V – 4.8V
Typical power consumption in SLEEP mode is 1.5mA ( BS-PA-MFRMS=2 )
SIM900D Quad-band: GSM 850, EGSM 900, DCS 1800, PCS 1900. The
SIM900D can search the 4 frequency bands automatically. The frequency
bands also can be set by AT command.
Compliant to GSM Phase 2/2+
Small MS
Class 4 (2W) at GSM 850 and EGSM 900
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2010.10.09