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SIM application toolkit

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SIM800A Introduction



SIM800A is a complete Dual-band GSM/GPRS solution in a SMT type, which can be embedded in the customerapplications. SIM800A supports Dual-band 900/1800MHz, it can transmit Voice, SMS and data information with low power consumption. With tiny size of 24*24*3mm, it can smoothly fit into slim and compact demands of customer design.




SIM900A Details


General features 

Dual-band 900/1800MHz GPRS multi-slot class 12/10 

•GPRS mobile station class B

 •Compliant to GSM phase 2/2+ –Class 4 (2 W @900MHz) –Class 1 (1 W @1800MHz) 

•Dimensions: 24*24*3mm •Weight: 3.1g

 •Control via AT commands (3GPP TS 27.007, 27.005 and SIMCom enhanced AT Commands) 

•Supply voltage range 3.4 ~ 4.4V

•Low power consumption 

•Operation temperature:-40℃ ~ 85℃


Specifications for GPRS Data 

•GPRS class 12: max. 85.6 kbps (downlink/uplink)

 •PBCCH support 

•Coding schemes CS 1, 2, 3, 4 

•PPP-stack •USSD


Specifications for SMS via GSM/GPRS

 •Point to point MO and MT 

•SMS cell broadcast 

•Text and PDU modeSoftware features 

•0710 MUX protocol 

•Embedded TCP/UDP protocol 



•Jamming Detection 

•Audio Record •SSL 

•TTS_CN (optional) 

•Bluetooth 3.0 (optional)

Specifications for voice

 •Tricodec –Half rate (HR) –Full rate (FR) –Enhanced Full rate (EFR) 

•AMR –Half rate (HR) –Full rate (FR) 

•Hands-free operation (Echo suppression)



 68 SMT pins including 

•Analog audio interface

•RTC backup 

•USB interface 

•Serial interface 

•Interface to external SIM 3V/1.8V





•GSM Antenna pad 

•Bluetooth Antenna pad



•AT cellular command interface