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AM26LS32

QUAD EIA-422/423 Line Receiver with Three-State Outputs

Motorola => Freescale 

Order this document by AM26LS32/D

QUAD EIA-422/423 Line

Receiver with Three-State

Outputs

Motorola′s Quad EIA–422/3 Receiver features four independent receiver

chains which comply with EIA Standards for the Electrical Characteristics of

Balanced/Unbalanced Voltage Digital Interface Circuits. Receiver outputs

are 74LS compatible, three–state structures which are forced to a high

impedance state when Pin 4 is a Logic “0” and Pin 12 is a Logic “1.” A PNP

device buffers each output control pin to assure minimum loading for either

Logic “1” or Logic “0” inputs. In addition, each receiver chain has internal

hysteresis circuitry to improve noise margin and discourage output instability

for slowly changing input waveforms. A summary of AM26LS32 features

include:

• Four Independent Receiver Chains

• Three–State Outputs

• High Impedance Output Control Inputs

(PIA Compatible)

• Internal Hysteresis – 30 mV (Typical) @ Zero Volts Common Mode

• Fast Propagation Times – 25 ns (Typical)

• TTL Compatible

• Single 5.0 V Supply Voltage

• Fail–Safe Input–Output Relationship. Output Always High When Inputs

Are Open, Terminated or Shorted

• 6.0 k Minimum Input Impedance

AM26LS32

QUAD EIA–422/3 LINE

RECEIVER WITH

THREE–STATE OUTPUTS

SEMICONDUCTOR

TECHNICAL DATA

D SUFFIX

PLASTIC PACKAGE

CASE 751B

(SO–16)

PC SUFFIX

PLASTIC PACKAGE

CASE 648

PIN CONNECTIONS

Representative Block Diagram

Differential

Inputs

Three–State

Control

Inputs

Output

Input

Network

Amplifier

Hysteresis

Level

Translator

Level

Translator

Amplifier

* Note that the surface mount MC26LS32D device uses the same die as in the plastic DIP

* AM26LS32DC device, but with an MC prefix to prevent confusion with the package suffix.

MOTOROLA ANALOG IC DEVICE DATA

Inputs A

1–

2+

Outputs A 3

3–State

Control 4

Output C 5

Inputs C

6+

7–

GND 8

16 VCC

– 15

Inputs B

+ 14

13 Output B

3–State

12 Control

11 Output D

+ 10

Inputs D

–9

ORDERING INFORMATION

Device

Operating

Temperature Range Package

AM26LS32PC

MC26LS32D*

TA = 0 to 70°C

Plastic DIP

SO–16

© Motorola, Inc. 1995

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