Copyright © 2010 Future Technology Devices International Limited 4
Document Reference No.: FT_000341
DS_UT232R-200(500) USB TO RS232 ADAPTER CABLE Data Sheet
Version 1.0
Clearance No.: 180
1 Introduction
1.1 Functional Description
The USB-RS232 adaptor cables are a family of communication devices. This model, UT232R, provides a
simple method of adapting legacy serial devices with RS232 interfaces to modern USB ports.
Each UT232R adapter contains a small internal electronic circuit board which utilises the FTDI FT232R,
mounted inside a rugged plastic enclosure capable of withstanding industrial temperature ranges. The
integrated electronics also include RS232 line drivers to provide true RS232 signal levels.
The Cable incorporates a standard USB-A device connector for connection to an upstream host or hub
port. RS232-level signals, including modem handshake signals, are available on an industry-standard
DE-9P connector. The connector moulding also includes thumb screws for locking the DB9 connector to
the mating half when assembled. The maximum RS232-level data rate is 1MBaud.
The UT232R adapter cable requires USB device drivers, available free from FTDI, which are used to make
the UT232R appear as a Virtual COM Port (VCP). This allows existing serial communications software,
such as HyperTerminal, to exchange data through the UT232R to a legacy RS232 peripheral device.
