CH9340 Datasheet (ETC)

CH9340, USB to UART

Power supply voltage input, requires an external 0.1uF power decoupling capacitor.

Ground Connect to VCC to input external power supply when 3.3V supply voltage, connect to external 0.1uF decoupling capacitor when 5V supply voltage Connect to USB D+ Signal directly Connect to USB D- Signal directly

CH9340 Features

* l Full-speed USB device interface, compatible with USB V2.0. l Based on USB CDC, used to upgrade the original serial peripheral devices, or expand additional serial UART through USB. l Free-driver, serial applications are totally compatible under the Windows OS, without any modification. l Hardware