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3.3. Pin Description
Table 8: I/O Parameters Definition
Type
Description
AI
Analog input
AO
Analog output
DI
Digital input
DO
Digital output
IO
Bidirectional
OD
Open drain
PI
Power input
PO
Power output
The following tables show the SC66's pin definition and electrical characteristics.
Table 9: Pin Description
Power Supply
Pin Name
Pin No.
I/O
36, 37,
PI/
VBAT
38
PO
VDD_RF
1, 2
PO
SC66_Hardware_Design
DC
Description
Characteristics
Vmax=4.4V
Power supply for the
Vmin=3.55V
module
Vnorm=4.0V
Connect to external
bypass capacitors to
Vmax=4.4V
eliminate voltage
Vmin=3.55V
fluctuation of RF
Vnorm=4.0V
part.
Smart LTE Module Series
SC66 Hardware Design
Comment
It must be provided
with sufficient current
up to 3.0A.
It is suggested to use a
TVS to increase
voltage surge
withstand capability.
Do not load externally.
26 / 139
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