74HC253 데이터 시트보기 (PDF) - Philips Electronics

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74HC253

Dual 4-input multiplexer; 3-state

Philips Electronics 

Philips Semiconductors

Dual 4-input multiplexer; 3-state

Product specification

74HC/HCT253

Fig.4 Functional diagram.

Fig.5 Logic diagram.

FUNCTION TABLE

SELECT INPUTS

S0

S1

nI0

X

X

X

L

L

L

L

L

H

H

L

X

H

L

X

L

H

X

L

H

X

H

H

X

H

H

X

NOTES

1. H = HIGH voltage level

L = LOW voltage level

X = don’t care

Z = high impedance OFF-state

DATA INPUTS

nI1

nI2

X

X

X

X

X

X

L

X

H

X

X

L

X

H

X

X

X

X

OUTPUT ENABLE OUTPUT

nI3

nOE

nY

X

H

Z

X

L

L

X

L

H

X

L

L

X

L

H

X

L

L

X

L

H

L

L

L

H

L

H

December 1990

4

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