Many applications need both an RS-232 and RS-485 serial port. The dual protocol devices integrate both transceivers into a single package. The single-port device can be programmed for either interface. The two-port configuration is very flexible as each port can be either protocol.
Both 3.3V and 5V supply options are available in SOIC and QFN packages. The QFN package has additional features including a logic supply pin (VL) and selectable RS-485 data rates. The RS-232 data rate can operate up to 400kbps.