2

HCS253MS

Functional Diagram

TRUTH TABLE

SELECT INPUTS

DATA INPUTS

OUTPUT

ENABLE

OUTPUT

S1

S0

I0

I1

I2

I3

OE

Y

XXXXXX

HZ

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

XXX

L

L

L

H

H

XXX

H

L

H

Select inputs S0 and S1 are common to both sections

H = High Level, L = Low Level, X = Immaterial, Z = High Impedance (Off)

2Y

9

S0

S1

10E

1I0

1I1

1I2

1I3

2I0

2I1

2I2

2I3

20E

VCC

15

GND

13

12

11

10

14

2

6

54

3

1

pn

20E

20E

16

8

20E

20E

1Y

7

np

10E

10E

10E

10E

Spec Number

518765