The Prolific PL2303GD is a USB-to-serial bridge controller compliant with USB 2.0 full-speed standards. It integrates an on-chip USB 1.1 transceiver, 5V-to-3.3V regulator, and 96 MHz clock generator for stable communication. The chip supports programmable OTPROM for USB descriptors, unique serial IDs, and 1024-byte bidirectional buffers. It includes built-in USB-CDC drivers for Windows 10, macOS, Linux, and Android, plus SDK support for virtual COM applications. Battery-charger detection is also supported, and the controller is packaged in a compact SSOP-16 form factor.