2

Functional Diagram

TRUTH TABLE

INPUTS

OUTPUTS

SELECT

OUTPUT ENABLE OE

Y

Y

S2

S1

S0

XXX

H

Z

Z

LLL

L

LL

H

L

LHL

L

LH

H

L

HL

L

L

HLH

L

HH

L

L

HHH

L

H = High logic level,L=Low logic level, Z = High impedance (off),

5

6

Y

Y

4

3

2

1

14

12

13

15

11

10

9

THREE-STATE

7

DISABLE OE

CHANNEL

INPUTS

DATA

SELECT

OUTPUTS

CD74AC251, CD74ACT251