This document introduces the features and characteristics of FTDI USB-RS232 adaptor cables
The US232R adapter cable provides a simple method of connecting legacy RS232 devices to modern USB ports using the FTDI FT232R bridge chip. It includes a USB‑A connector, a DE‑9P RS232 connector, and status LEDs for TX and RX signals.
Key features include two cable lengths (10 cm and 100 cm), a maximum data rate of 1 MBaud, operation from –20 °C to +80 °C, FIFO buffers (128 B TX, 256 B RX), and driver support for Windows, macOS, Linux and Windows CE. The device is powered directly from the USB port and requires no external power supply.
| Maximum RS232 data rate | 1 MBaud |
|---|---|
| Operating temperature | -20 °C to +80 °C |
| USB connector type | USB‑A |
| RS232 connector type | DE‑9P (male) |
| Cable lengths | 10 cm (US232R‑10) and 100 cm (US232R‑100) |
| LED indicators | TX and RX status LEDs |
| FIFO buffer sizes | 128 byte TX, 256 byte RX |
| Power source | USB powered, no external adapter required |
The adapter supports a maximum RS232‑level data rate of 1 MBaud.
Drivers are available for Windows (including Vista, XP, Server 2003, 2000, ME, 98, CE), macOS, Linux and Windows CE.
No, the cable is powered directly from the USB port and does not need an external adapter.
The US232R is sold in two lengths: 10 cm (part number US232R‑10) and 100 cm (part number US232R‑100).