CP2102N Datasheet, PDF (3/44 Pages) Silicon Laboratories – USBXpress Family

2. Typical Connection Diagrams
CP2102N Data Sheet
Typical Connection Diagrams
2.1 Power
In all cases, a 1 kΩ pull-up on the RSTb pin is recommended. This pull-up should be tied to VIO on devices that have it. On devices
where VIO is connected to VDD or devices that do not have VIO, this pull-up should be tied to VDD.
The figure below shows a typical connection diagram for the power pins of the CP2102N devices when the internal regulator is used
and USB is connected (bus-powered).
USB 5 V (in)
4.7 µF and 0.1 µF bypass
capacitors required for
each power pin placed as
close to the pins as
possible.
VIO
3.3 V (out)
RSTb
VREGIN
VDD
CP2102N Device
Voltage
Regulator
GND
Figure 2.1. Connection Diagram with Voltage Regulator Used and USB Connected (Bus-Powered)
The figure below shows a typical connection diagram for the power pins of the CP2102N devices when the internal regulator is used
and USB is connected (self-powered).
VIO
4.7 µF and 0.1 µF bypass
capacitors required for
each power pin placed as
close to the pins as
possible.
3.6-5.25 V (in)
3.3 V (out)
RSTb
VREGIN
VDD
CP2102N Device
Voltage
Regulator
GND
Figure 2.2. Connection Diagram with Voltage Regulator Used and USB Connected (Self-Powered)
silabs.com | Smart. Connected. Energy-friendly.
Rev. 1.0 | 2