Smart Machine Smart Decision
SIM868_Series_Hardware_Design_V1.06
58
2017-07-13
8.
Electrical, Reliability and Radio Characteristics
8.1.
Absolute Maximum Ratings
The absolute maximum ratings stated in Table 34 are stress ratings under non-operating conditions. Stresses
beyond any of these limits will cause permanent damage to SIM868.
Table 34: Absolute maximum ratings
Symbol
Min
Typ
Max
Unit
GSM_VBAT
-
-
4.5
V
GPS_VBAT
-
-
4.5
VRTC
-
-
4.5
GNSS_EN
-
-
4.5
Current (GSM_VBAT)
0
-
2.0
A
USB_VBUS
-
-
7
V
I
I
*
-
4
16
mA
I
O
*
-
4
16
mA
*These parameters are for digital interface pins,
GPIO, and UART.
8.2.
Recommended Operating Conditions
Table 35: Recommended operating conditions
Symbol
Parameter
Min
Typ
Max
Unit
GSM_VBAT
GSM power supply voltage
3.4
4.0
4.4
V
GPS_VBAT
GPS power supply voltage
2.9
4.0
4.4
VRTC
Backup battery voltage
2.3
4.3
GNSS_EN(V
OH
) GPS enable
1.5
2.8
4.4
V
GNSS_EN(V
OL
) GPS disable
-
-
0.3
V
T
OPER
Operating temperature
-40
+25
+85
℃
T
STG
Storage temperature
-45
+90
℃
8.3.
Digital Interface Characteristics
Table 36: Digital interface characteristics
Symbol
Parameter
Min
Typ
Max
Unit
V
IH
High-level input voltage
2.1
-
3.0
V
V
IL
Low-level input voltage
-0.3
-
0.7
V
V
OH
High-level output voltage
2.4
-
-
V
V
OL
Low-level output voltage
-
-
0.4
V
SIMCOM
CONFIDENTIAL
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