Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 42 / 139
1)
uUSB refers to any USB interface except for USB Type-C.
3.4. Power Supply
3.4.1. Power Supply Pins
SC66 provides three VBAT pins, two VDD_RF pins and one VPH_PWR pin. VBAT pins must be
connected to an external power supply. VDD_RF pins are used to connect bypass capacitors of external
RF Power supply, so as to eliminate voltage fluctuation of RF part. VPH_PWR is used for powering other
devices.
3.4.2. Decrease Voltage Drop
The power supply range of the module is from 3.55V to 4.4V, and the recommended value is 4.0V. The
power supply performance, such as load capacity, voltage ripple, etc. directly influences the module’s
performance and stability. Under ultimate conditions, the module may have a transient peak current up to
3A. If the power supply capability is not sufficient, there will be voltage drops, and if the voltage drops
below 2.85V, the module will be powered off automatically. Therefore, please make sure the input voltage
will never drop below 2.85V.
CBL_PWR_N
22
DI
Used for configuring
auto power-on
If customers require
automatic power-on,
this pin should be
shorted-to-ground.
DP_AUX_P
221
AI/
AO
DisplayPort auxiliary
channel (+)
DP_AUX_N
220
AI/
AO
DisplayPort auxiliary
channel (-)
Reserved pins
Pin Name
Pin
No.
I/O
Description
DC
Characteristics
Comment
RESERVED
17,
213,
214,
215,
216,
217,
222,
235
Reserved pins
Keep these pins open.
NOTE
