Smart Machine Smart Decision
SIM900-DS_Hardware Design_V1.00
37
2013-01-20
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 SIM900-DS.
Table 14: 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
15
: 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 16: 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.
