© 2000 Fairchild Semiconductor Corporation

DS010154

www.fairchildsemi.com

January 1990

Revised August 2000

74ACQ543• 74ACTQ543

Quiet Series

 Octal Registered Transceiver

with 3-STATE Outputs

General Description

The ACQ/ACTQ543 is a non-inverting octal transceiver

containing two sets of D-type registers for temporary stor-

age of data flowing in either direction. Separate Latch

Enable and Output Enable inputs are provided for each

register to permit independent input and output control in

either direction of data flow.

The ACQ/ACTQ utilizes Fairchild Quiet Series

 technol-

ogy to guarantee quiet output switching and improved

dynamic threshold performance FACT Quiet Series

 fea-

tures GTO

 output control and undershoot corrector in

addition to a split ground bus for superior performance.

Features

s Guaranteed simultaneous switching noise level and

dynamic threshold performance

s Guaranteed pin-to-pin skew AC performance

s 8-bit octal latched transceiver

s Separate controls for data flow in each direction

s Back-to-back registers for storage

s Outputs source/sink 24 mA

s 300 mil slim PDIP/SOIC

Ordering Code:

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the order code.

Connection Diagram

Pin Descriptions

FACT

, Quiet Series, FACT Quiet Series and GTO are trademarks of Fairchild Semiconductor Corporation.

Order Number

Package Number

Package Description

74ACQ543SC

M24B

24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

74ACQ543SPC

N24C

24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

74ACTQ543SC

M24B

24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

74ACTQ543QSC

MQA24

24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide

74ACTQ543SPC

N24C

24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Pin Names

Description

OEAB

A-to-B Output Enable Input (Active LOW)

OEBA

B-to-A Output Enable Input (Active LOW)

CEAB

A-to-B Enable Input (Active LOW)

CEBA

B-to-A Enable Input (Active LOW)

LEAB

A-to-B Latch Enable Input (Active LOW)

LEBA

B-to-A Latch Enable Input (Active LOW)

A-to-B Data Inputs or

B-to-A 3-STATE Outputs

B-to-A Data Inputs or

A-to-B 3-STATE Outputs