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CH342K on a board, in 3D

CH342K

WCH (Nanjing Qinheng Microelectronics)

-40℃~+85℃ 15mA 2 3.3V、5V 3Mbps 50uA USB 2.0 USB to serial ESSOP-10-150mil USB Converters ROHS

Extended
DatasheetJLCPCBLCSCwch/CH342K
Category
USB Converters
Package
ESSOP-10-150mil
Pins
11

Overview

The CH342K is a USB Converter made by WCH (Nanjing Qinheng Microelectronics) in a ESSOP-10-150mil package with 11 pins. -40℃~+85℃ 15mA 2 3.3V、5V 3Mbps 50uA USB 2.0 USB to serial ESSOP-10-150mil USB Converters ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:CH342K, from EasyEDA) and its footprint (EasyEDA_Cloud:SSOP-10_L5.0-W3.9-P1.00-LS6.0-BL-EP, from EasyEDA), ready for a KiCad board. 7,110 are in stock at JLCPCB (part C2826608). 2 open-source boards in 2 repositories on GitHub use it.

Symbol

UD+1UD-2GND3VDD54TXD15RXD16VIO7TXD08RXD09V310GND11
EasyEDA_Cloud:CH342KFrom EasyEDA

Footprint

1234567891011
EasyEDA_Cloud:SSOP-10_L5.0-W3.9-P1.00-LS6.0-BL-EPFrom EasyEDA

Parameters

9
Applications Function
USB to serial
Current - Supply
15mA
Data Rate
3Mbps
Features
Programmable baud rate；Wake-up function；Built-in clock generator；Hardware flow control support；Low-power mode；Power-on reset
Number of Channels
2
Operating Temperature
-40℃~+85℃
Quiescent Supply Current
50uA
USB Protocol
USB 2.0
Voltage - Supply
5V

Order codes

1

Pinout

11
The pins of the CH342K
PinNameType
1UD+Unspecified
2UD-Unspecified
3GNDUnspecified
4VDD5Unspecified
5TXD1Unspecified
6RXD1Unspecified
7VIOUnspecified
8TXD0Unspecified
9RXD0Unspecified
10V3Unspecified
11GNDUnspecified

Open-source boards using it

All 2
  • 2 layers53 × 20 mm20250807 updi, the printed circuit board in 3D

    20250807 updi

    uwezi/AVR-Dx

    some general stuff about the AVR-DA and AVR-DB series

    29 parts6MIT
  • 2 layers80 × 60 mmETH2Zigbee, the printed circuit board in 3D

    ETH2Zigbee

    acha666/ETH2Zigbee

    71 parts

Show this part on your page

A live frame, for any web page
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A picture
<img src="https://pcbkit.io/embed/parts/wch/CH342K.jpg" alt="CH342K" width="1200" height="900">
A picture that opens the part, for a README
[![CH342K](https://pcbkit.io/embed/parts/wch/CH342K.jpg?size=s)](https://pcbkit.io/parts/wch/CH342K)

Questions

Is there a KiCad symbol and footprint for the CH342K?

Yes. The symbol is EasyEDA_Cloud:CH342K and the footprint EasyEDA_Cloud:SSOP-10_L5.0-W3.9-P1.00-LS6.0-BL-EP, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the CH342K?

ESSOP-10-150mil, with 11 pins. Its footprint is drawn on this page.

Where is the CH342K datasheet?

WCH (Nanjing Qinheng Microelectronics) publishes it: the Datasheet link on this page opens it.

Where can I order the CH342K?

JLCPCB lists it as part C2826608, with 7,110 in stock; the sellers' links on this page open their listings.

Which open-source boards use the CH342K?

2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.