HD74LS148

Rev.2.00, Feb.18.2005, page 2 of 5

Function Table

Inputs

Outputs

EI

0

1

2

3

4

5

6

7

A2

A1

A0

GS

EO

H

X

X

X

X

X

X

X

X

H

H

H

H

H

L

H

H

H

H

H

H

H

H

H

H

H

H

L

L

X

X

X

X

X

X

X

L

L

L

L

L

H

L

X

X

X

X

X

X

L

H

L

L

H

L

H

L

X

X

X

X

X

L

H

H

L

H

L

L

H

L

X

X

X

X

L

H

H

H

L

H

H

L

H

L

X

X

X

L

H

H

H

H

H

L

L

L

H

L

X

X

L

H

H

H

H

H

H

L

H

L

H

L

X

L

H

H

H

H

H

H

H

H

L

L

H

L

L

H

H

H

H

H

H

H

H

H

H

L

H

H ; high level, L ; low level, X ; irrelevant

Block Diagram

EO

GS

A0

A1

A2

0

1

2

3

4

5

6

7

EI

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.