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SIMCom presents an ultra compact and reliable wireless module. The SIM900A is a complete Dual-band GSM/GPRS module in a SMT type which is designed specially for Chinese market, allowing you to benefit from small dimensions and cost-effective solutions.
Featuring an industry-standard interface, the SIM900A delivers GSM/GPRS 900/1800MHz performance for voice, SMS, Data, and Fax in a small form factor and with low power consumption. With a tiny configuration of 24mm x 24mm x 3 mm, SIM900A can fit almost all the space requirements in your applications, especially for slim and compact demand of design.
 
General features:
 

• Dual-Band 900/ 1800 MHz
• GPRS multi-slot class 10/8
• GPRS mobile station class B
• Compliant to GSM phase 2/2+
•   – Class 4 (2 W @900 MHz)
•   – Class 1 (1 W @ 1800MHz)
• Dimensions: 24*24*3 mm
• Weight: 3.4g
• Control via AT commands (GSM 07.07 ,07.05 and   
•   SIMCOM enhanced AT Commands)
• SIM application toolkit
• Supply voltage range : 3.1 ... 4.8V
• Low power consumption: 1.5mA(sleep mode)
• Operation temperature: -40°C to +85 °C

Specifications for Fax:

• Group 3, class 1

 
Specifications for Data:
 

• GPRS class 10: max. 85.6 kbps (downlink)
• PBCCH support
• Coding schemes CS 1, 2, 3, 4
• CSD up to 14.4 kbps
• USSD
• Non transparent mode
• PPP-stack

 
Specifications for SMS via GSM/GPRS:

• Point to point MO and MT
• SMS cell broadcast
• Text and PDU mode

Software features:

• 0710 MUX protocol
• embedded TCP/UDP protocol
• FTP/HTTP( available at July ,2010)

 
Enhanced version add following features:

• FOTA ( available at July ,2010)
• MMS (available at July ,2010)
• Embedded AT (available at Q3,2010)

 
Specifications for Voice:
 

• Tricodec
•   – Half rate (HR)
•   – Full rate (FR)
•   – Enhanced Full rate (EFR)
• Hands-free operation
•   (Echo suppression)
• AMR
•   – Half rate (HR)
•   – Full rate (FR)

 
Interfaces:

• Interface to external SIM 3V/ 1.8V
• analog audio interface
• RTC backup
• SPI interface
• Two Serial interfaces
• Antenna pad
• I2C
• GPIO
• PWM
• ADC

 
Compatibility:

• AT cellular command interface

 
Certificates:

• ROHS
• TA
• REACH