TRS3221 Datasheet | Texas Instruments

Features - 1 RS-232 Bus-Pin ESD Protection Exceeds ±15 k V Using Human-Body Model (HBM) - Meets or Exceeds the Requirements of TIA/EIA232-F and ITU V.28 Standards - Operates With 3-V to 5.5-V VCC Supply - Operates up to 250 kbps - One Driver and One Receiver - 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 Mbps) - SNx5C3221 - Automatic Power-Down Feature Automatically Disables Drivers for Power Savings 2 Applications - Battery-Powered, Hand-Held, and Portable Equipment - Notebooks, Subnotebooks, and Laptops - Digital Cameras - Mobile Phones and Wireless Devices 3 Description The TRS3221 device consists of one line driver, one line receiver with dedicated enable pin, and a dual charge-pump circuit with ±15-k V ESD protection pinto-pin (serial-port connection pins, including GND). 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 one 3-V to 5.5-V supply. The TRS3221 device operates at data signaling rates up to 250 kbps 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 automatic power-down 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 and the supply current is reduced to 1 μA. The INVALID output notifies the user if an RS-232 signal is present at the receiver input. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) SSOP (32) TSSOP (32) 6.20 mm x 5.30 mm 5.00 mm × 4.40 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Schematic 3.3 V, 5 V POWER EN...