2

Functional Diagram

1Y

GND = 8

4

3

5

6

SEL/MUX

7

1

14

2

2Y

12

13

11

10

SEL/MUX

9

15

1E

S0

S1

2E

TRUTH TABLE

SELECT INPUTS

DATA INPUTS

ENABLE

INPUTS

OUTPUT

S1

S0

nE

nY

XXXXXX

H

L

LLL

X

X

X

LL

L

L

H

XXX

L

H

LH

X

L

X

X

L

L

L

HXHX

X

L

H

HL

X

X

L

X

L

L

H

L

X

XHX

L

H

H

H

X

X

X

LLL

HH

X

X

X

H

L

H

Select inputs S1 and S0 are common to both sections. H = High Level, L = Low Level, X = Don’t Care, Z = High Impedance.

CD74AC153, CD74ACT153