TRSF3221E

TRSF3221E SLLS822B – JULY 2007 – REVISED JULY 2021 TRSF3221E 3-V to 5.5-V Single-Channel RS-232 1-Mbit Line Driver and Receiver With ±15-kV IEC ESD Protection in Small Package 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 Operates with 3-V to 5.5-V VCC supply Operates up to 1 Mbit/s – Low-speed pin-compatible device (250 kbit/s) – TRS3221E Available in near chip-scale package, 16-pin VQFN (RGT, 82% smaller than TSSOP package) Low standby current: 1 μA typical External capacitors : 4 × 0.1 μF Accepts 5-V logic input with 3.3-V supply 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 TRSF3221E consists 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). The TRSF3221E provides 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 3-V to 5.5-V supply. The TRSF3221E operates 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 manag...