MC74AC323 Datasheet, PDF (1/8 Pages) ON Semiconductor – 8-INPUT UNIVERSAL SHIFT/ STORAGE REGISTER WITH SYNCHRONOUS RESET AND COMMON I/O PINS

MC74AC323
MC74ACT323
Advance Information
8ĆInput Universal Shift/Storage
Register with Synchronous
Reset and Common I/O Pins
The MC74AC323/74ACT323 is an 8-bit universal shift/storage register with
3-state outputs. Its function is similar to the MC74AC299/74ACT299 with the
exception of Synchronous Reset. Parallel load inputs and flip-flop outputs are
multiplexed to minimize pin count. Separate serial inputs and outputs are provided
for Q0 and Q7 to allow easy cascading. Four operation modes are possible: hold
(store), shift left, shift right and parallel load.
• Common Parallel I/O for Reduced Pin Count
• Additional Serial Inputs and Outputs for Expansion
• Four Operating Modes: Shift Left, Shift Right, Load and Store
• 3-State Outputs for Bus-Oriented Applications
• Outputs Source/Sink 24 mA
• ′ACT323 Has TTL Compatible Inputs
VCC S1 DS7 Q7 I/O7 I/O5 I/O3 I/O1 CP DS0
20 19 18 17 16 15 14 13 12 11
8-INPUT UNIVERSAL SHIFT/
STORAGE REGISTER WITH
SYNCHRONOUS RESET
AND COMMON I/O PINS
N SUFFIX
CASE 738-03
PLASTIC
DW SUFFIX
CASE 751D-04
PLASTIC
1 2 3 4 5 6 7 8 9 10
S0 OE1 OE2 I/O6 I/O4 I/O2 I/O0 Q0 SR GND
PIN NAMES
CP
Clock Pulse Input
DS0
Serial Data Input for Right Shift
DS7
Serial Data Input for Left Shift
S0, S1
Mode Select Inputs
SR
Synchronous Master Reset
1
OE1, OE2 3-State Output Enable Inputs
2
I/O0–I/O7 Multipled Parallel Data Inputs or
3-State Parallel Data Outputs
Q0, Q7
Serial Outputs
LOGIC SYMBOL
S0
DS0
S1
CP
DS7
Q7
OE
SR Q0 I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7
This document contains information on a new product. Specifications and information herein are subject to change without notice.
FACT DATA
5-1