About this item

The CH340G is a cost-effective, full-speed USB interface chip (compliant with USB 2.0) that transforms USB signals into serial UART communication with support for both TTL and RS-232 logic standards. Designed in a compact SOIC-16 surface-mount package, it employs minimal external components—typically a crystal and capacitors—for straightforward integration. It supports full-duplex data transfer, enabling baud rates from 50 bps up to 2 Mbps, and includes common modem control signals such as RTS, DTR, DCD, RI, DSR, and CTS, making it versatile for diverse serial communication needs. The device is compatible with 3.3 V and 5 V voltage levels, depending on power setup, and can be adapted with external level shifters for interfaces such as RS-232, RS-485, RS-422, or IrDA (SIR). It works seamlessly across major operating systems using virtual COM port drivers, enabling legacy serial applications on modern USB-only computers. Additionally, compared to the CH340N variant that omits modem control signals, the CH340G retains them—making it better suited for auto-reset or flow-controlled applications. Ideal for upgrading devices without native USB or adding extra serial ports, the CH340G provides a reliable bridge between USB and traditional serial interfaces.