DPU232 – Highly Integrated USB-to-UART Bridge Controller

Overview

The DPU232 is a highly integrated USB-to-UART bridge controller that converts RS232 to USB with minimal components and PCB space. It includes a USB 2.0 full-speed controller, transceiver, oscillator, EEPROM, and full modem control UART in a compact SSOP28 package—no external USB components required. The integrated EEPROM supports OEM customization (VID, PID, strings, power descriptor, serial number) and is programmable via USB during manufacturing or debugging.

Key Features

• Integrated USB Transceiver: Compliant with USB 2.0, no external resistors needed.

• Integrated Clock: No external crystal required.

• 1024-bit EEPROM: Stores VID, PID, serial number, strings, and CBUS config; up to 2K custom space.

• Configurable CBUS I/O Pins.

• Level Shifting: Supports 1.8V–5V external signals on UART/CBUS.

• True 5V/3.3V/2.5V/1.8V CMOS I/O.

• Adjustable I/O Drive Strength.

• TX/RX LED Drivers.

• UART with Full Modem Control.

• On-Chip POR and 3.3V Regulator.

• Power Supply: Self-powered: 3.0–3.6V; Bus-powered: 4.2–5.25V.

• Driver Support: Windows (11 to 98), macOS, Linux, Windows CE.

Applications

• USB to RS232/422/485 converters

• Legacy peripheral upgrades to USB

• Cellular phone USB data cables

• MCU/PLD/FPGA USB interfaces

• USB audio/video transfer

• PDA, smart card readers, instruments

• Industrial control, MP3, flash card readers

• Set-top box, camera, modem, barcode reader interfaces

• USB software/hardware encryption

Development Support

Full technical support, samples, and demo boards available.

Contact Us

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