SN75C189A

SN75C189, SN75C189A QUADRUPLE LOW-POWER LINE RECEIVERS D Meet or Exceed the Requirements of TIA/EIA-232-F and ITU Recommendation V.28 D Low Supply Current . . . 420 µA Typ D Preset On-Chip Input Noise Filter D Built-in Input Hysteresis D Response and Threshold Control Inputs D Push-Pull Outputs D Functionally Interchangeable and Pin-to-Pin Compatible With Texas Instruments SN75189/SN75189A and Motorola MC1489/MC1489A D Package Options Include Plastic Small-Outline (D) and Shrink Small-Outline (DB) Packages, and Standard Plastic (N) DIP SLLS041G – OCTOBER 1988 – REVISED JANUARY 2000 D, DB, OR N PACKAGE (TOP VIEW) 1A 1 1 CONT 2 1Y 3 2A 4 2 CONT 5 2Y 6 GND 7 14 VCC 13 4A 12 4 CONT 11 4Y 10 3A 9 3 CONT 8 3Y description The SN75C189 and SN75C189A are low-power, bipolar, quadruple line receivers that are used to interface data terminal equipment (DTE) with data circuit-terminating equipment (DCE). These devices have been designed to conform to TIA/EIA-232-F. The SN75C189 has a 0.33-V typical hysteresis, compared with 0.97 V for the SN75C189A. Each receiver has provision for adjustment of the overall input threshold levels. This is achieved by choosing external series resistors and voltages to provide bias levels for the response-control pins. The output is in the high logic state if the input is open circuit or shorted to ground. These devices have an on-chip filter that rejects input pulses of less than 1-µs duration. An external capacitor can be connected from the control pi...