Sim 900D

SIM900D_Hardware Design_V2.00

Smart Machine Smart Decision

Document Title

SIM900D Hardware Design

Version

2.00

Date

2011-03-30

Status

Release

Document Control ID

SIM900D_Hardware Design_V2.00

General Notes
SIMCom offers this information as a service to its customers, to support application and engineering efforts that
use the products designed by SIMCom.The information provided is based upon requirements specifically
provided to SIMCom by the customers. SIMCom has not undertaken any independent search for additional
relevant information, including any information that may be in the customer’s possession. Furthermore, system
validation of this product designed by SIMCom within a larger electronic system remains the responsibility of thecustomer or the customer’s system integrator. All specifications supplied herein are subject to change.
Copyright
This document contains proprietary technical information which is the property of SIMCom Limited, copying of
this document and giving it to others and the using or communication of the contents thereof, are forbidden
without express authority. Offenders are liable to the payment ofdamages. All rights reserved in the event of grant
of a patent or the registration of a utility model or design. All specification supplied herein are subject to change
without notice at any time.
Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2011

SIM900D_Hardware Design_V2.00

2

2011-03-30

Smart Machine Smart Decision

ContentsContents.................................................................................................................................................................... 3
Version History ........................................................................................................................................................ 7
1Introduction....................................................................................................................................................... 8

2

SIM900D Overview........................................................................................................................................... 8
2.1
SIM900D Key Features ............................................................................................................................ 8
2.2Operating Modes .................................................................................................................................... 10
2.3
SIM900D Functional Diagram ................................................................................................................11

3

Package Information...................................................................................................................................... 12
3.1
Pin out Diagram...................................................................................................................................... 12
3.2
Pin Description ....................................................................................................................................... 13
3.3
PackageDimensions............................................................................................................................... 15

4

Application Interface...................................................................................................................................... 17
4.1
PowerSupply.......................................................................................................................................... 17
4.1.1 Minimizing Voltage Drop of VBAT ................................................................................................... 18
4.1.2 Monitoring Power Supply ................................................................................................................... 18
4.2
Power on/down Scenarios...