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SIM900D Hardware Design
5.5 Electro-Static Discharge
The GSM engine is not protected against Electrostatic Discharge (ESD) in general. Therefore, it is subject to ESD
handing precautions that typically apply to ESD sensitive components. Proper ESD handing and packaging
procedures must be applied throughout the processing, handing and operation of any application using a
SIM900D module.
The measured values of SIM900D are shown as the following table:
Table31: The ESD endure statue measured table (Temperature: 25 , Humidity:45% )
Part
VBAT
GND
RXD, TXD
ANT
SPK1P/1N
SPK2P/2N
MIC1P/1N
MIC2P/2N
PWRKEY
Other port
*
Note: The PWRKEY is recommended to use the ESD protection component.
SIM900D_HD_V1.02
℃
Contact discharge
±5KV
±5KV
±2KV
±5KV
±3KV
±2KV
TBD
54
Air discharge
±10KV
±10KV
±8KV
±10KV
±8KV
±8KV
TBD
09.04.2010
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