SIM Tech SIMCom SIM900-DS Hardware Design page 4

4.8 LCD Display/SPI Interface ..............................................................................................31
4.9 PCM Interface ...................................................................................................................32
4.10 ADC ....................................................................................................................................32
4.11 RI Behaviors ......................................................................................................................32
4.12 Network Status Indication ...............................................................................................33
4.13 General Purpose Input/Output (GPIO)..........................................................................34
4.14 External Reset ...................................................................................................................34
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4.15 I C Bus ...............................................................................................................................35
4.16 Antenna Interface .............................................................................................................35
5 Electrical, Reliability and Radio Characteristics.............................................. 37
5.1 Absolute Maximum Ratings.............................................................................................37
5.2 Recommended Operating Conditions .............................................................................37
5.3 Digital Interface Characteristics......................................................................................37
5.4 SIM Card Interface Characteristics................................................................................38
5.5 VDD_EXT Characteristics...............................................................................................38
5.6 SIM1_VDD and SIM2_VDD Characteristics.................................................................38
5.7 VRTC Characteristics ......................................................................................................38
5.8 Current Consumption (VBAT = 3.8V)............................................................................39
5.9 Electro-Static Discharge ...................................................................................................40
5.10 Radio Characteristics .......................................................................................................40
5.10.1 Module RF Output Power................................................................................................................ 40
5.10.2 Module RF Receive Sensitivity ....................................................................................................... 42
5.10.3 Module Operating Frequencies........................................................................................................ 42
6 Manufacturing...................................................................................................... 43
6.1 Top and Bottom View of SIM900-DS..............................................................................43
6.2 Typical Solder Reflow Profile ..........................................................................................44
Appendix .................................................................................................................... 45
A. Related Documents...................................................................................................................45
B. Terms and Abbreviations ........................................................................................................46
C. Safety Caution ..........................................................................................................................47
SIM900-DS_Hardware Design_V1.00
Smart Machine Smart Decision
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2013-01-20