SimCom SIM900 Hardware Design

SIM900 Hardware Design
4.3 Module Operating Frequencies
Table 25: SIM900 operating frequencies
Frequency Receive Transmit
GSM850 869 ～ 894MHz 824 ～ 849 MHz
EGSM900 925 ～ 960MHz 880 ～ 915MHz
DCS1800 1805 ～ 1880MHz 1710 ～ 1785MHz
PCS1900 1930 ～ 1990MHz 1850 ～ 1910MHz
5 Electrical, Reliability and Radio Characteristics
5.1 Absolute Maximum Ratings
The absolute maximum ratings stated in Table 28 are stress ratings under non-operating conditions. Stresses
beyond any of these limits will cause permanent damage to SIM900.
Table
26: Absolute maximum ratings
Parameter Min Max Unit
VBAT - 5.5 V
Peak current of power supply 0 3.0 A
Voltage at digit pins* -0.3 3.1 V
I
I
* - 10 mA
I
O
* - 10 mA
*For digital interface pins, such as keypad, GPIO, I2C, UART, LCD and PWMs.
5.2 Operating Temperatures
The operating temperature is listed in following table:
Table
27: SIM900 operating temperature
Parameter Min Typ Max Unit
Ambient temperature -30 +25 +80 ℃
Restricted operation* -40 to -30 +80 to +85 ℃
Storage temperature -45 +90 ℃
* The SIM900 does work, but deviations from the GSM specification may occur.
SIM900_HD_V1.05 06.23.2010
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SimCom SIM900 Specifications

General

Brand	SimCom
Model	SIM900
Category	Modem
Language	English