USB-Serial adapter CH340G, 5V/3.3V

USB-Serial adapter CH340G, 5V/3.3V

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USB-Serial adapter/microcontroller CP2104, 5V/3.3V, digital I/O, Micro-USB

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USB-Serial adapter/microcontroller CP2104, 5V/3.3V, digital I/O, Micro-USB
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This USB to UART Bridge is a module, base on Silicon Labs CP2104 UART bridge, and it is a good solution for connecting micro-controllers and other digital serial devices to PC.
For connecting to PC used micro-USB socket.
The device also features up to four GPIO signals that can be user-defined for status and control information. Direct access driver support is available through the Silicon Labs USBXpress driver set. See for the latest application notes and product support information for the CP2104.

This board uses 5V signal levels by default. For use 3.3V level, pls cut off the bridge for 5V of soldering pads on bottom side of board, and make soldering the pads for 3.3V
For get detail information of IC CP2104 USB-UART bridge, pls folow this link:
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USB-TTL Serial adapter CP2102
Power Out
  • 3.3V-180mA
  • 5V-180mA
Power IN. USB 5V
Ports 18
Operating temperature −40С°/+85С°
Length×Width 29×15.50mm


Dimensional drawing

Dimensions USB-Serial adapter/microcontroller CP2104 Dimensions USB-Serial adapter/microcontroller CP2104


Pinout USB-Serial adapter/microcontroller CP2104 Pinout USB-Serial adapter/microcontroller CP2104


Schematic of USB-Serial adapter/microcontroller CP2104