Electrical, Reliability And Radio Characteristics; Absolute Maximum Ratings; Recommended Operating Conditions; Digital Interface Characteristics - SIM Tech SIMCom SIM868 Series Hardware Design

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
GSM_VBAT
GPS_VBAT
VRTC
GNSS_EN
Current (GSM_VBAT)
USB_VBUS
I *
I
I *
O
*These parameters are for digital interface pins, GPIO, and UART.

8.2. Recommended Operating Conditions

Table 35: Recommended operating conditions
Symbol Parameter
GSM_VBAT GSM power supply voltage
GPS_VBAT GPS power supply voltage
VRTC Backup battery voltage
GNSS_EN(V ) GPS enable
OH
GNSS_EN(V ) GPS disable
OL
T Operating temperature
OPER
T Storage temperature
STG

8.3. Digital Interface Characteristics

Table 36: Digital interface characteristics
Symbol Parameter
V High-level input voltage
IH
V Low-level input voltage
IL
V High-level output voltage
OH
V Low-level output voltage
OL
SIM868_Series_Hardware_Design_V1.06
Min Typ
- -
- -
- -
- -
0 -
- -
- 4
- 4
Min
3.4
2.9
2.3
1.5
-
-40
-45
Min
2.1
-0.3
2.4
-
Smart Machine Smart Decision
Max
4.5
4.5
4.5
4.5
2.0
7
16
16
Typ Max
4.0 4.4
4.0 4.4
4.3
2.8 4.4
- 0.3
+25 +85
+90
Typ Max
- 3.0
- 0.7
- -
- 0.4
58
Unit
V
A
V
mA
mA
Unit
V
V
V
℃
℃
Unit
V
V
V
V
2017-07-13