SN65C3223E Datasheet | Texas Instruments

FEATURES - ESD Protection for RS-232 Bus 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 - Meet or Exceed the Requirements of TIA/EIA-232-F and ITU v.28 Standards - Operate With 3-V to 5.5-V VCC Supply - Operate up to 1000 kbit/s - Two Drivers and Two Receivers - Low Standby Current . . . 1 µA Typ - External Capacitors . . . 4 × 0.1 µF - Accepts 5-V Logic Input With 3.3-V Supply APPLICATIONS - Battery-Powered Systems - PDAs - Notebooks - Laptops - Palmtop PCs - Hand-Held Equipment DESCRIPTION /ORDERING INFORMATION The SN65C3223E and SN75C3223E consist of two line drivers, two line receivers, and a dual charge-pump circuit with ±15-k V ESD protection pin to pin (serial-port connection pins, including GND). These devices meet the requirements of TIA/EIA-232-F and provide 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. The devices operate at typical data signaling rates up to 1000 kbit/s. DB, DW, OR PW PACKAGE (TOP VIEW) EN 1 C1+ 2 V+ 3 C1- 4 C2+ 5 C2- 6 V- 7 DOUT2 8 RIN2 9 ROUT2 10 20 FORCEOFF 19 VCC 18 GND 17 DOUT1 16 RIN1 15 ROUT1 14 FORCEON 13 DIN1 12 DIN2 11 INVALID RHL PACKAGE (TOP VIEW) EN FORCEOFF C1+ 2 NC 3 V+ 4 C1- 5 C2+ 6 C2- 7 V- 8 DOUT2 9 NC 10 RIN2 11 1 24 23 VCC 22 NC 21 GND 20 DOUT1 19 RIN1 18 ROUT1 17 FORCEON 16 DIN1 15 NC 14 DIN2 12 13 ROUT2 INVALID - No internal connection Flexible control options for power management are available when the serial port is inactive. The auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the devices do not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is set low and EN is high, both drivers and receivers are shut off, and the supply current is reduced to 1 m A. Disconnecting the serial port or...