HD74LS164

Rev.2.00, Feb.18.2005, page 2 of 8

Function Table

Inputs

Outputs

Clear

Clock

A

B

L

X

X

X

L

L

L

H

L

X

X

H

↑

H

H

H

H

↑

L

X

L

H

↑

X

L

L

Notes: 1. H; high level, L; low level, X; irrelevant

2.

↑; transition from low to high level

3.

were established.

4.

↑ transition of the clock; indicates a one-bit shift.

Block Diagram

Clear

Clock

Serial

Inputs

A

B

Output

Output

Output

Output

Output

QE

Output

Output

Output

Clear

R

S

CK

Clear

R

S

CK

Clear

R

S

CK

Clear

R

S

CK

Clear

R

S

CK

Clear

R

S

CK

Clear

R

S

CK

Clear

R

S

CK

Absolute Maximum Ratings

Item

Symbol

Ratings

Unit

Supply voltage

7

V

Input voltage

7

V

Power dissipation

400

mW

Storage temperature

Tstg

–65 to +150

°C

Note:

Voltage value, unless otherwise noted, are with respect to network ground terminal.

Recommended Operating Conditions

Item

Symbol

Min

Typ

Max

Unit

Supply voltage

4.75

5.00

5.25

V

—

—

–400

µA

Output current

—

—

8

mA

Operating temperature

–20

25

75

°C

Clock frequency

0

—

25

MHz

Clock pulse width

20

—

—

ns

Clear pulse width

20

—

—

ns

Data setup time

15

—

—

ns

Data hold time

5

—

—

ns