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FIBOCOM FG621-LA Series Hardware Guide
Page 47 of 57
8 Reliability
8.1 Limiting Voltage Range
The limiting voltage includes the absolute limiting voltage and the operating limiting voltage. The absolute
limiting voltage is the maximum voltage that the module can bear, beyond which the module may be
damaged. The operating limiting voltage is the normal operating voltage range of the module, beyond
which the module will have an abnormal performance.
8.1.1 Absolute Limiting Voltage
The absolute limiting voltage range of FG621-LA series module is shown as follow.
Table 8-1 Absolute limiting voltage range
Parameter
Description
Min
Typ
Max
Unit
VBAT
Power supply
-0.3
3.8
4.7
V
GPIO
Level power supply voltage of digital
I/O
-0.3
1.85
2.05
V
8.1.2 Operating Limiting Voltage
Table 8-2 Operating limiting voltage
Signal
Logic low level
Logic high level
Unit
Min
Max
Min
Max
Digital input -0.3
0.6
1.2
2.1
V
Digital output -
0.45
1.35
-
V
Parameter
I/O
Min
Typ
Max
Unit
VBAT
PI
3.4
3.8
4.3
V
USIM_VDD
PO
1.7/2.75
1.8/2.85
1.9/3.05
V
8.2 Ambient Temperature Range
The FG621-LA series module is recommended to operate at -30
~+75
ambient temperature. When
℃
℃
the module is operating within the limited operating temperature range, some RF indexes may exceed the
limit, so the module application terminal should consider temperature control measures. The module
application terminal is recommended to be stored in certain temperature conditions. Modules may not
operate or may be damaged beyond this range.
