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8 Reliability
8.1 Limiting Voltage Range
The limiting voltage range is maximum voltage range that power supply and digital or analog input/output
interfaces can withstand.
8.1.1 Absolute Voltage Range
The absolute voltage range of NL668-LA series module is shown as table 8-1.
Table 8-1 Absolute voltage range
Parameter
description
VBAT
Power supply
GPIO
Digital IO supply voltage
8.1.2 Operating Voltage Range
Table 8-2 Operating Voltage Range
V
L
Parameter
Min
Digital input
-0.3
Digital output
-
V
: logic low level; V
L
H
Parameter
VBAT
USIM_VDD
8.2 Environment Temperature Range
The recommended operating temperature range of NL668-LA series module.is -30℃ to +75℃. When
module operating at limited temperature range, some RF indexes may exceed standard, so module
application terminal should consider temperature control measurement. The module application terminal
is recommended storage in certain temperature conditions. Modules out of the temperature range may
not operate or may be damaged.
Reproduction forbidden without Fibocom Wireless Inc. written authorization - All Rights Reserved.
FIBOCOM NL668-LA Series Hardware Guide
Max
0.6
0.45
: logic high level;
I/O
PI
PO
Min
Typ.
-0.3
3.8
-0.3
1.8
V
H
Min
1.2
1.35
Min
Typ
3.3
3.8
1.7/2.75
1.8/2.85
Max
4.7
2.0
Unit
Max
2.0
V
-
V
Max
4.3
1.9/2.95
Unit
V
V
Unit
V
V
Page 50 of 61
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