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FIBOCOM L860-GL Series Hardware Guide
Page 24 of 60
The stable power supply can ensure the normal operation of L860 module. The ripple of the power supply
should be less than 300mV in design. Because module support 5CA download. When module operates
with the maximum data transfer throughput, the peak current can reach to upper 2500mA. It requests the
power source voltage should not be lower than 3.135V, otherwise module may shut down or restart. The
power supply requirement is shown in Figure 3-3:
Burst transmit
Burst transmit
min:3.135V
Power supply
Ripple
≤
300mV
Drop
VBAT
≥
3.135V
Figure 3-3 Power supply requirement
Logic Level
The L860 module 1.8V logic level definition is shown in the following table:
Parameter
Minimum
Typical
Maximum
Unit
1.8V logic level
1.71
1.8
1.89
V
V
IH
1.3
1.8
1.89
V
V
IL
-0.3
0
0.3
V
The L860 module 3.3V logic level definition is shown in the following table:
Parameter
Minimum
Typical
Maximum
Unit
3.3V logic level
3.135
3.3
3.465
V
V
IH
2.3
3.3
3.465
V
V
IL
-0.3
0
0.3
V
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