74ACT323 8-Bit Universal Shift/Storage Register with Synchronous Reset and Common I/O Pins
June 1988
Revised October 1998
74ACT323
8-Bit Universal Shift/Storage Register with
Synchronous Reset and Common I/O Pins
General Description
The ACT323 is an 8-bit universal shift/storage register with
3-STATE outputs. Parallel load inputs and flip-flop outputs
are multiplexed to minimize pin count. Separate serial
inputs and outputs are provided for Q
0
and Q
7
to allow
easy cascading. Four operation modes are possible: hold
(store), shift left, shift right and parallel load.
Features
s
I
CC
and I
OZ
reduced by 50%
s
Common parallel I/O for reduced pin count
s
Additional serial inputs and outputs for expansion
s
Four operating modes: shift left, shift right, load and
store
s
3-STATE outputs for bus-oriented applications
s
Outputs source/sink 24 mA
s
TTL-compatible inputs
Ordering Code:
Order Number
74ACT323PC
Package Number
N20A
Package Description
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300鈥?Wide
Device also available in Tape and Reel. Specify by appending suffix letter 鈥淴鈥?to the ordering code.
Logic Symbols
Connection Diagram
Pin Assignment
for DIP
Pin Descriptions
Pin Name
CP
DS
0
DS
7
S
0
, S
1
SR
OE
1
, OE
2
I/O
0
鈥揑/O
7
Description
Clock Pulse Input
Serial Data Input for Right Shift
Serial Data Input for Left Shift
Mode Select Inputs
Synchronous Reset Input
3-STATE Output Enable Inputs
Multiplexed Parallel Data Inputs or
3-STATE Parallel Data Outputs
Q
0
, Q
7
FACT鈩?is a trademark of Fairchild Semiconductor Corporation.
Serial Outputs
漏 1999 Fairchild Semiconductor Corporation
DS009787.prf
www.fairchildsemi.com