The ST3222 is a 3V-powered EIA/TIA-232 and V.28/V.24 communications interface with low power requirements and high data-rate capabilities. The ST3222 has a proprietary low dropout transmitter output stage enabling true RS-232 performance from 3.0V to 3.6V supplies. The device requires only four small 0.1µF external capacitors for operation from a +3V supply. The device has two receivers and two drivers. The ST3222 features a 1µA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers can remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1µA supply current. The device is guaranteed to run at data rates of 250Kpbs while maintaining RS-232 output levels.
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