SN54/74LS323
8-BIT SHIFT/STORAGE REGISTER
WITH 3-STATE OUTPUTS
The SN54/74LS323 is an 8-Bit Universal Shift/Storage Register with
3-stateoutputs. ItsfunctionissimilartotheSN54/74LS299withtheexception
of Synchronous Reset. Parallel load inputs and flip-flop outputs are
multiplexed to minimize pin count. Separate inputs and outputs are provided
8-BIT SHIFT/STORAGE REGISTER
WITH 3-STATE OUTPUTS
for flip-flops Q and Q to allow easy cascading.
0
7
LOW POWER SCHOTTKY
Four operation modes are possible: hold (store), shift left, shift right, and
parallel load. All modes are activated on the LOW-to-HIGH transition of the
Clock.
• Common I/O for Reduced Pin Count
• Four Operation Modes: Shift Left, Shift Right, Parallel Load and Store
• Separate Continuous Inputs and Outputs from Q and Q Allow Easy
Cascading
0
7
J SUFFIX
CERAMIC
CASE 732-03
• Fully Synchronous Reset
• 3-State Outputs for Bus Oriented Applications
• Input Clamp Diodes Limit High-Speed Termination Effects
• ESD > 3500 Volts
20
1
N SUFFIX
PLASTIC
CASE 738-03
20
1
CONNECTION DIAGRAM DIP (TOP VIEW)
V
S
DS
Q
I/O
I/O
I/O
I/O
CP DS
0
DW SUFFIX
SOIC
CASE 751D-03
CC
20
1
7
7
7
5
3
1
19
18
17
16
15
14
13
12
11
20
1
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN Plastic
SN74LSXXXDW SOIC
Ceramic
1
2
3
4
5
6
8
9
10
7
S
0
OE OE
I/O I/O
I/O
I/O
Q
SR GND
1
2
6
4
2
0
0
PIN NAMES
LOADING (Note a)
HIGH
LOW
CP
Clock Pulse (active positive going edge) Input
Serial Data Input for Right Shift
Serial Data Input for Left Shift
Parallel Data Input or
Parallel Output (3-State) (Note c)
3-State Output Enable (active LOW) Inputs
Serial Outputs (Note b)
0.5 U.L.
0.5 U.L.
0.5 U.L.
1.0 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
0.5 U.L.
DS
DS
0
7
n
I/O
65 (25) U.L.
15 (7.5) U.L.
OE , OE
0.5 U.L.
10 U.L.
1 U.L.
0.25 U.L.
5 (2.5) U.L.
1
2
Q , Q
0
7
1
S , S
Mode Select Inputs
0
SR
Synchronous Reset (active LOW) Input
0.5 U.L.
0.25 U.L.
NOTES:
a) 1 TTL LOAD = 40 µA HIGH/1.6 mA LOW.
b) The output LOW drive factor is 2.5 U.L for Military (54) and 5 U.L. for Commercial Temperature Ranges.
c) The output LOW drive factor is 7.5 U.L for Military (54) and 15 U.L. for Commercial Temperature Ranges.
The output HIGH drive factor is 25 U.L. for Military (54) and 65 U.L. for Commercial Temperature Ranges.
FAST AND LS TTL DATA
5-1