Quectel SC20 Series - Pin Description

Smart Module Series
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3.3. Pin Description
Table 8: I/O Parameters Definition
The following table shows the pin definition and electrical characteristics of SC20 series.
Table 9: Pin Description
Type Description
AI Analog Input
AO Analog Output
AIO Analog Input/Output
DI Digital Input
DO Digital Output
DIO Digital Input/Output
OD Open drain
PI Power Input
PO Power Output
PIO Power Input/Output
Power Supply
Pin Name
Pin
No.
I/O Description DC Characteristics
Comment
VBAT_BB 1, 2 PI
Power supply for
module’s
baseband part
Vmax = 4.2 V
Vmin = 3.5 V
Vnom = 3.8 V
You must provide
them with sufficient
current of up to
3.0 A.
It is suggested to
add a TVS for
surge protection.
VBAT_RF
145,
146
PI
Power supply for
module’s RF part
Vmax = 4.2 V
Vmin = 3.5 V
Vnom = 3.8 V
VRTC 126 PIO
Power supply for
internal RTC
circuit
V
O
max = 3.2 V
V
I
= 2.0–3.25 V
If unused, keep this
pin open.