SN75C3221E

SN65C3221E, SN75C3221E SLLS694C – NOVEMBER 2005 – REVISED JULY 2021 3-V to 5.5-V Single-channel RS-232 1-Mbits Line Driver and Receiver with ±15-kV IEC ESD Protection 1 Features ESD Protection for RS-232 pins – ±15-kV Human-body model (HBM) – ±8-kV IEC 61000-4-2 Contact discharge – ±15-kV IEC 61000-4-2 Air-gap discharge Operate with 3-V to 5.5-V VCC supply Operate up to 1 Mbit/s Low Standby Current . . . 1 μA Typical External capacitors . . . 4 × 0.1 μF Accepts 5-V logic input with 3.3-V supply RS-232 Bus-pin esd protection exceeds ±15 kv using human-body model (HBM) Auto-powerdown feature automatically disables drivers for power savings 2 Applications Industrial PCs Wired networking Data center and enterprise computing Battery-powered systems PDAs Notebooks Laptops Palmtop PCs Hand-held equipment 3 Description The SN65C3221E and SN75C3221E consist of one line driver, one line receiver, and a dual charge-pump circuit with ±15-kV IEC ESD protection pin to pin (serial-port connection pins, including GND). These devices provide the electrical interface between an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single spacer DIN 11 3-V to 5.5-V supply. These devices operate at data signaling rates up to 1 Mbit/s and a driver output slew rate of 24 V/μs to 150 V/μs. Flexible control options for power management are available when the serial port is in...