SN75C189ADR

RS-232 Line Receivers, Texas Instruments### RS-232 线路驱动器和接收器

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 A/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.

• Meet or Exceed the Requirements of TIA/EIA-232-F and ITU Recommendation V.28

• Low Supply Current . . . 420 µA Typ

• Preset On-Chip Input Noise Filter

• Built-in Input Hysteresis

• Response and Threshold Control Inputs

• Push-Pull Outputs

• Functionally Interchangeable and Pin-to-Pin Compatible With Texas Instruments SN75189/SN75189A and Motorola MC1489/MC1489A

• Package Options Include Plastic Small-Outline D and Shrink Small-Outline DB Packages, and Standard Plastic N

DIP