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This is a cheap alternative IC for the FTDI chip to provide UART over USB.

Manufacturer: WinChipHead


USB information

Vendor ID: 1A86

Device ID: 7523

REV: 0254

Manufacturer information

Manufacturer: Jiangsu Nanjing QinHeng Electronics Co

Websites: and and



Locally hosted driver for Windows 7: File:UART CH341 W7.ZIP

I had success with these drivers on a $3 (YES!) Arduino Nano clone board from China.

CH340 chip on Nano clone

Alternate links