CH340G in WCH CH340 / CH341 Family
The CH340G is a popular USB-to-serial bridge controller manufactured by Jiangsu Qinheng Microelectronics (WCH). It serves as a cost-effective alternative to industry-standard FTDI and CP210x solutions, providing a full-duplex UART interface with hardware flow control. Designed for the USB 2.0 interface, it is widely utilized in the hobbyist and industrial sectors due to its integrated clock oscillator, minimal external component requirement, and robust driver support across major operating systems including Windows, Linux, and macOS.
Variants in This Sub-Family
The CH340 sub-family primarily differentiates variants by package size and integrated features. While the CH340G utilizes an SOP-16 package and requires an external crystal in older revisions (though newer ones integrate it), the CH340C features a built-in clock to save board space. Other variants like the CH340E offer ultra-compact MSOP-10 footprints, while the CH340B adds integrated EEPROM for custom VID/PID configuration and unique serial numbers.
