AD7306 Overview
The part contains two RS-232 drivers, one RS-422 driver, one RS-232 receiver, and one receiver path which can be configured either as RS-232 or as RS-422. An internal charge pump voltage converter facilitates operation from a single +5 V power supply. The internal charge pump generates ± 10 V levels allowing RS-232 output levels to be developed without the need for external bipolar power supplies.