54ACT323 8-Bit Universal Shift/Storage Register with Synchronous Reset and Common I/O Pins
July 1998
54ACT323
8-Bit Universal Shift/Storage Register with Synchronous
Reset and Common I/O Pins
General Description
The 鈥橝CT323 is an 8-bit universal shift/storage register with
TRI-STATE
廬
outputs. Parallel load inputs and flip-flop out-
puts 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.
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
TTL-compatible inputs
n
Standard Military Drawing (SMD)
鈥?鈥橝CT323: 5962-91607
Features
n
I
CC
and I
OZ
reduced by 50%
Logic Symbols
DS100328-1
DS100328-5
Pin Name
CP
DS
0
DS
7
S
0
, S
1
SR
OE
1
, OE
2
I/O
0
鈥揑/O
7
Q
0
, Q
7
Description
Clock Pulse Input
Serial Data Input for Right Shift
Serial Data Input for Left Shift
Mode Select Inputs
Synchronous Reset Input
TRI-STATE Output Enable Inputs
Multiplexed Parallel Data Inputs or
TRI-STATE Parallel Data Outputs
Serial Outputs
TRI-STATE
廬
is a registered trademark of National Semiconductor Corporation.
FACT
鈩?/div>
is a trademark of Fairchild Semiconductor Corporation.
漏 1998 National Semiconductor Corporation
DS100328
www.national.com
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