54AC299

8-Input Universal Shift/Storage Register with Common

Parallel I/O Pins

General Description

The ’AC/’ACT299 is an 8-bit universal shift/storage register

sible: hold (store), shift left, shift right and load data. The par-

allel load inputs and flip-flop outputs are multiplexed to re-

duce the total number of package pins. Additional outputs

are provided for flip-flops Q

ing. A separate active LOW Master Reset is used to reset the

register.

Features

n Common parallel I/O for reduced pin count

n Additional serial inputs and outputs for expansion

n Four operating modes: shift left, shift right, load and

store

n TRI-STATE outputs for bus-oriented applications

n Outputs source/sink 24 mA

n ’ACT299 has TTL-compatible inputs

n Standard Microcircuit Drawing (SMD)

’AC299: 5962-88754

’ACT299: 5962-88771

Ordering Code:

Logic Symbols

Connection Diagrams

DS100252-1

IEEE/IEC

DS100252-4

Pin Assignment

for DIP and Flatpak

DS100252-2

Pin Assignment for LCC

DS100252-3

September 1998

© 1998 National Semiconductor Corporation

DS100252

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