Revised Date:

March 20, 2013

ds_pl2303HXD_v1.4.4

PL-2303HX (Rev D) Product Datasheet

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Document Version 1.4.4

3.0 Introduction

PL-2303HX (Chip Rev D) or PL-2303HXD provides a convenient solution for connecting an RS232-like

full-duplex asynchronous serial device to any Universal Serial Bus (USB) capable host. PL-2303HXD

highly compatible drivers could simulate the traditional COM port on most operating systems allowing

the existing applications based on COM port to easily migrate and be made USB ready.

By taking advantage of USB bulk transfer mode, large data buffers, and automatic flow control,

PL-2303HXD is capable of achieving higher throughput compared to traditional UART (Universal

Asynchronous Receiver Transmitter) ports. When real RS232 signaling is not required, baud rate

higher than 115200 bps could be used for even higher performance. The flexible baud rate generator of

PL-2303HXD could be programmed to generate any rate between 75 bps to 12M bps.

PL-2303HXD is exclusively designed for mobile and embedded solutions in mind, providing a small

footprint that could easily fit in to any connectors and handheld devices. With very small power

consumption in either operating or suspend mode, PL-2303HXD is perfect for bus powered operation

with plenty of power left for the attached devices. Flexible signal level requirement on the RS232-like

serial port side also allows PL-2303HXD to connect directly to any 3.3V~1.8V range devices.