5-1

FAST AND LS TTL DATA

8-BIT SHIFT/STORAGE REGISTER

WITH 3-STATE OUTPUTS

The SN54 / 74LS323 is an 8-Bit Universal Shift / Storage Register with

3-state outputs. Its function is similar to the SN54 / 74LS299 with the exception

of Synchronous Reset. Parallel load inputs and flip-flop outputs are

multiplexed to minimize pin count. Separate inputs and outputs are provided

for flip-flops Q0 and Q7 to allow easy cascading.

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.

Cascading

CONNECTION DIAGRAM DIP (TOP VIEW)

NOTE:

The Flatpak version

has the same pinouts

(Connection Diagram) as

the Dual In-Line Package.

18

17

16

15

14

13

1

2

3

4

5

6

7

20

19

8

VCC

S0

S1 DS7 Q7 I/O7

I/O3

I/O5

I/O1

OE1 OE2 I/O6 I/O4 I/O2 I/O0 Q0

9

10

SR

GND

12

11

CP

DS0

PIN NAMES

LOADING (Note a)

HIGH

LOW

CP

Clock Pulse (active positive going edge) Input

0.5 U.L.

0.25 U.L.

DS0

Serial Data Input for Right Shift

0.5 U.L.

0.25 U.L.

DS7

Serial Data Input for Left Shift

0.5 U.L.

0.25 U.L.

I/On

Parallel Data Input or

Parallel Output (3-State) (Note c)

1.0 U.L.

65 (25) U.L.

0.5 U.L.

15 (7.5) U.L.

OE1, OE2

3-State Output Enable (active LOW) Inputs

0.5 U.L.

0.25 U.L.

Q0, Q7

S0, S1

Serial Outputs (Note b)

Mode Select Inputs

10 U.L.

1 U.L.

5 (2.5) U.L.

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.

SN54/74LS323

8-BIT SHIFT/STORAGE REGISTER

WITH 3-STATE OUTPUTS

LOW POWER SCHOTTKY

ORDERING INFORMATION

SN54LSXXXJ

Ceramic

SN74LSXXXN

Plastic

SN74LSXXXDW SOIC

20

1

J SUFFIX

CERAMIC

CASE 732-03

20

1

N SUFFIX

PLASTIC

CASE 738-03

20

1

DW SUFFIX

SOIC

CASE 751D-03