hardware design v1 00 2

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SIM900R_Hardware Design_V1.00 37 2012-07-20
5 Electrical, Reliability and Radio Characteristics
5.1 Absolute Maximum Ratings
The absolute maximum ratings stated in following table are stress ratings under non-operating conditions. Stresses
beyond any of these limits will cause permanent damage to SIM900R.
Table 15: Absolute maximum ratings
Symbol Parameter Min Typ Max Unit
VBAT Power supply voltage - - 5.5 V
V
I
*
Input voltage -0.3 - 3.1 V
I
I
*
Input current - - 10 mA
I
O
*
Output current - - 10 mA
*
These parameters are for digital interface pins, such as keypad, GPIO, I
2
C, UART, LCD, PWMs and DEBUG.
5.2 Recommended Operating Conditions
Table 16: Recommended operating conditions
Symbol Parameter Min Typ Max Unit
VBAT Power supply voltage 3.2 4.0 4.8 V
T
OPER
Operating temperature -40 +25 +85 ℃
T
STG
Storage temperature -45 +90 ℃
5.3 Digital Interface Characteristics
Table 17: Digital interface characteristics
Symbol Parameter Min Typ Max Unit
I
IH
High-level input current -10 - 10 uA
I
IL
Low-level input current -10 - 10 uA
V
IH
High-level input voltage 2.4 - - V
V
IL
Low-level input voltage - - 0.4 V
V
OH
High-level output voltage 2.7 - - V
V
OL
Low-level output voltage - - 0.1 V
* These parameters are for digital interface pins, such as keypad, GPIO, I
2
C, UART, LCD, PWMs and DEBUG.