The WCH CH347F is a multifunction USB interface chip designed for high-speed communication and hardware debugging in embedded systems. It supports JTAG, SPI, I²C, UART, and GPIO interfaces, making it suitable for MCU programming, firmware flashing, and device testing. The CH347F connects via USB 2.0 and offers reliable, low-latency data transfer for development and production environments. It is commonly used in programmers, debuggers, and USB adapter boards. This particular is smaller an surface mountable TSSOP20 form.