The Prolific PL2303GT is a low-cost, high-performance USB-to-RS232 bridge controller with an integrated RS-232 transceiver, designed to connect full-duplex asynchronous serial devices to USB hosts. It enables legacy serial equipment to operate on modern systems through drivers that create virtual COM ports across major operating systems. The chip meets EIA/TIA-232F and CCITT V.28 interface specifications and integrates a transceiver with three transmitters and five receivers. Its embedded high-efficiency charge pump delivers proper bipolar RS-232 voltage levels while maintaining low power consumption, supporting reliable data communication at speeds up to 1 Mbps.