Using FTDI’s FT232RQ USB-to-asynchronous serial interface IC, FTDI’s USB-RS485-WE and USB-RS422-WE converter cables utilize a RS-485 and RS-422 transceiver, respectively. The far end of the 1.8-m cables are wire ended, and the complete USB protocol is managed within the FT232RQ. Royalty-free device drivers for the IC, available at http://www.ftdichip.com/FTDrivers.htm, support Windows, Mac OS X, and Linux. A user-writeable EEPROM area allows the USB interface to be customized and can be programmed in-circuit over the USB interface. The cables suit industrial applications, such as instrumentation, machine control and data collection.