This document describes the features and characteristics of the ST207EB and ST207EC 5 V RS-232 transceivers, including ±15 kV ESD protection for RS-232 I/O pins, 230kbps data rate, guaranteed minimum slew rate of 3 V/ms, and operation from a single 5 V power supply. It is designed for RS-232 and V.28 communications in harsh environments.