HD74LS253

Rev.3.00, Jul.15.2005, page 2 of 5

Function Table

Select inputs

Data inputs

Output

control

Output

B

A

G

Y

X

X

X

X

X

X

H

Z

L

L

L

X

X

X

L

L

L

L

H

X

X

X

L

H

L

H

X

L

X

X

L

L

L

H

X

H

X

X

L

H

H

L

X

X

L

X

L

L

H

L

X

X

H

X

L

H

H

H

X

X

X

L

L

L

H

H

X

X

X

H

L

H

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

2. Address inputs A and B are common to both sections.

Block Diagram

Output

1Y

Output

2Y

Output

Control

Output

Control

Data 1

Data 2

Select

1G

2G

B

A

Absolute Maximum Ratings

Item

Symbol

Ratings

Unit

Supply voltage

7

V

Input voltage

7

V

Output voltage (off-state)

5.5

V

Operating temperature

Topr

–20 to +75

°C

Power dissipation

400

mW

Storage temperature

Tstg

–65 to +150

°C

Note:

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