GP232RNL — USB-to-UART Bridge Controller

The GP232RNL is a highly integrated USB-to-UART bridge controller that provides a simple, minimal-component solution for converting RS232 to USB. It integrates a USB 2.0 full-speed function controller, USB transceiver, oscillator, EEPROM, and a full-featured asynchronous serial UART with modem control signals — all in a single SSOP28 package, requiring no external USB components.

An on-chip EEPROM allows customization of USB Vendor ID, Product ID, product description string, power descriptor, release number, and serial number. Programming is performed in-system via USB.

Key Features

• Integrated USB transceiver (USB 2.0 compliant, no external resistors)

• Integrated clock — no external crystal required

• 1024-bit EEPROM for VID/PID/serial number/power descriptor/product strings/CBUS configuration

• Configurable CBUS I/O pins

• Built-in level shifters on UART & CBUS for 1.8 V–5 V logic

• True 5 V / 3.3 V / 2.5 V / 1.8 V CMOS I/O

• Adjustable I/O drive strength

• TX/RX LED drive signals

• Asynchronous UART with full modem control signals

• Data bits: 5, 6, 7, 8

• Stop bits: 1, 1.5, 2

• Parity: odd, even, mark, space, none

• Baud rate: 300 bps to 3 Mbps

• 256-byte RX + 256-byte TX buffers

• Hardware or X-On/X-Off handshaking

• On-chip power-on reset

• Integrated 3.3 V regulator

• Supply voltage:

• Self-powered: 3.0–3.6 V

• Bus-powered: 4.2–5.25 V

Package

• SSOP28

Applications

• USB ↔ RS232 / RS422 / RS485 converters

• Upgrading legacy peripherals to USB

• Cellular & cordless phone USB cables/interfaces

• MCU/PLD/FPGA USB interfacing

• USB audio & low-bandwidth video

• PDA ↔ USB transfer

• USB smart card readers

• USB instrumentation

• USB industrial control

• USB MP3 player interfaces

• USB flash card readers/writers

• Set-top box PC–USB interface

• USB digital camera interface

• USB hardware modems

• USB wireless modems

• USB barcode readers

• USB software/hardware encryption dongles

Driver Support

• Windows 11 / 10 / 8 / 7 / Vista / XP (32 & 64-bit)

• Windows 98 / ME / 2000 / Server 2003 / XP Embedded / CE 4.2–6.0

• macOS 8/9 / OS-X

• Linux 2.4 and later