54ACT323 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – 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 ’ACT323 is an 8-bit universal shift/storage register with
TRI-STATE^® outputs. Parallel load inputs and flip-flop out-
puts 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.
Features
n I_CC and I_OZ reduced by 50%
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)
— ’ACT323: 5962-91607
Logic Symbols
DS100328-1
Pin Name
CP
DS₀
DS₇
S₀, S₁
SR
OE₁, OE₂
I/O₀–I/O₇
Q₀, Q₇
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^® is a registered trademark of National Semiconductor Corporation.
FACT™ is a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100328
DS100328-5
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