TRS3221E Datasheet | Texas Instruments

Features - ESD Protection for RS-232 Pins - ±15-k V Human-Body Model (HBM) - ±8 k V (IEC 61000-4-2, contact discharge) - ±15 k V (IEC 61000-4-2, air-gap discharge) - Meets or exceeds the requirements of TIA/ EIA-232-F and ITU v.28 standards - Operates with 3-V to 5.5-V VCC supply - Operates up to 250 kbit/s - One driver and one receiver - 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 - Alternative high-speed pin-patible device (1 Mbit/s) - TRSF3221E - Auto-powerdown feature automatically disables drivers for power savings 2 Applications - Industrial PCs - Wired networking - Data center and enterprise puting - Battery-powered systems - PDAs - Notebooks - Laptops - Palmtop PCs - Hand-held equipment 3 Description The TRS3221E is a single driver, single receiver RS-232 solution operating from a single VCC supply. The RS-232 pins provide IEC G1000-4-2 ESD protection. The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous munication 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. These devices operate at data signaling rates up to 250 kbit/s and a maximum of 30-V/μs driver output slew rate. Flexible control options for power management are available when the serial port is inactive. The autopowerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal on the receiver input, the driver output is disabled. If FORCEOFF is set low and EN is high, both the driver and receiver are shut off, and the supply current is reduced to 1 μA. Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur. Autopowerdown can be disabled when FORCEON and FORCEOFF...