December 1991

Revised December 1998

© 1999 Fairchild Semiconductor Corporation

DS010967.prf

www.fairchildsemi.com

74ACTQ16543

16-Bit Registered Transceiver with 3-STATE Outputs

General Description

The ACTQ16543 contains sixteen non-inverting transceiv-

ers containing two sets of D-type registers for temporary

storage of data flowing in either direction. Each byte has

separate control inputs which can be shorted together for

full 16-bit operation. Separate Latch Enable and Output

Enable inputs are provided for each register to permit inde-

pendent input and output control in either direction of data

flow.

The ACTQ16543 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 for

superior performance.

Features

s Utilizes Fairchild FACT Quiet Series technology

s Guaranteed simultaneous switching noise level and

dynamic threshold performance

s Guaranteed pin-to-pin output skew

s Independent registers for A and B buses

s Separate controls for data flow in each direction

s Back-to-back registers for storage

Multiplexed real-time and stored data transfers

s Separate control logic for each byte

s 16-bit version of the ACTQ543

s Outputs source/sink 24 mA

s Additional specs for Multiple Output Switching

s Output loading specs for both 50 pF and 250pF loads

Ordering Code:

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

Logic Symbol

Pin Descriptions

FACT

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

Order Number

Package Number

Package Description

74ACTQ16543SSC

MS56A

56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300” Wide

74ACTQ16543MTD

MTD56

56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

Pin Names

Descriptions

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

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

A-to-B Enable Input (Active LOW)

B-to-A Enable Input (Active LOW)

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

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