Original Creation Date: 08/25/95

Last Update Date: 10/05/98

Last Major Revision Date: 03/19/97

MN54ABT646-X REV 0B0

MICROCIRCUIT DATA SHEET

OCTAL TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

General Description

The ABT646 consists of bus tranceiver circuits wit TRI-STATE, D-type flip-flops, and

control circuitry arranged for multiplexed transmission of data directly from the input

bus or from the internal registers.

Data on the A or B bus will be clocked into the

registers as the appropriate clock pin goes to a high logic level.

Control OE and

direction pins are provided to control the transceiver function.

In the transceiver mode,

data present at the high impedance port may be stored in either the A or the B register or

in both.

The select controls can mutiplex stored and real-time (transparent mode) data.

The direction control determines which bus will receive data when the enable control OE is

Active LOW.

In the isolation mode (control OE HIGH), A data may be stored in the B

register and/or B data may be stored in the A register.

NS Part Numbers

54ABT646E-QML *

54ABT646J-QML **

54ABT646W-QML ***

Industry Part Number

54ABT646

Prime Die

NB646

Controlling Document

See Features Page

Processing

MIL-STD-883, Method 5004

Quality Conformance Inspection

MIL-STD-883, Method 5005

Subgrp Description

Temp ( C)

o

1

Static tests at

+25

2

Static tests at

+125

3

Static tests at

-55

4

Dynamic tests at

+25

5

Dynamic tests at

+125

6

Dynamic tests at

-55

7

Functional tests at

+25

8A

Functional tests at

+125

8B

Functional tests at

-55

9

Switching tests at

+25

10

Switching tests at

+125

11

Switching tests at

-55

1