Prolific PL2303 Family of USB to Serial Bridge Chips

The PL2303 is a family of USB to serial bridge controllers which can connect a variety of serial devices to a USB host, allowing full RS232/422/485 or TTL communications. By simulating COM ports, these chips make serial devices and applications USB-ready.

By taking advantage of USB bulk transfer mode, large data buffers, and automatic flow control, the PL2303 achieves higher throughput than traditional UART’s. The flexible baud rate generator can be programmed to generate any rate between 75 bps to 12M bps.

With a small footprint and low power consumption in either operating or suspend mode, the PL-2303 is perfect for bus powered operation with power left for attached devices. Flexible signal level requirement on the RS232-like serial port side also allows the PL2303 to connect directly to any 3.3V~1.8V range devices.

Choosing a specific PL2303 chip gives added features such as:

  • up to 12 GPIO’s
  • built in OTP ROM
  • multi CLK (3/6/12/24 MHz) output
  • PWM and access LED
  • USB port system-level ESD protection
  • built-in RS232 transceiver
  • internal CLK generator
  • small SOP8 footprint

Applications include POS, medical, M2M, industrial controllers, RFID modules, scientific and engineering instruments, STB’s, marine electronics, home automation and security, high speed network servers and digital signage.

Click here to see all PL2303 Family Products.