Pin Description - Quectel Smart LTE Module Series Hardware Design

3.3. Pin Description

Table 4: I/O Parameters Definition
Type
IO
DI
DO
PI
PO
AI
AO
OD
The following tables show the SC650T's pin definition and electrical characteristics.
Table 5: Pin Description
Power Supply
Pin Name Pin No.
VBAT 36，37，38 PI/PO
VDD_RF 1，2
VPH_PWR 220,221
SC650T_Hardware_Design
Description
Bidirectional
Digital input
Digital output
Power input
Power output
Analog input
Analog output
Open drain
I/O Description
Power supply for the
battery.
Connect to external
bypass capacitors to
PO eliminate voltage
fluctuation of RF
part.
PO Power supply for the Vmax=4.4V
Smart LTE Module Series
SC650T Hardware Design
DC
Comment
Characteristics
It must be able to
provide sufficient
current up to 3.0A.
Vmax=4.4V
It is suggested to
Vmin=3.55V
use a TVS to
Vnorm=3.8V
increase voltage
surge withstand
capability.
Vmax=4.4V
Do not load
Vmin=3.55V
externally.
Vnorm=3.8V
Peripheral power
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