Pin Description - Quectel SC20 Series Hardware Design

3.3. Pin Description

Table 8: I/O Parameters Definition
Type
AI
AO
AIO
DI
DO
DIO
OD
PI
PO
PIO
The following table shows the pin definition and electrical characteristics of SC20 series.
Table 9: Pin Description
Power Supply
Pin Name
VBAT_BB
VBAT_RF
VRTC
SC20_Series_Hardware_Design
Description
Analog Input
Analog Output
Analog Input/Output
Digital Input
Digital Output
Digital Input/Output
Open drain
Power Input
Power Output
Power Input/Output
Pin
I/O Description
No.
Power supply for
1, 2 PI module's
baseband part
145, Power supply for
PI
146 module's RF part
Power supply for
126 PIO internal RTC
circuit
Smart Module Series
DC Characteristics Comment
Vmax = 4.2 V
Vmin = 3.5 V
Vnom = 3.8 V
Vmax = 4.2 V
Vmin = 3.5 V
Vnom = 3.8 V
V max = 3.2 V
O
V = 2.0–3.25 V
I
You must provide
them with sufficient
current of up to
3.0 A.
It is suggested to
add a TVS for
surge protection.
If unused, keep this
pin open.
24 / 133