74HC139 データシートの表示（PDF） - Philips Electronics

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74HC139

Dual 2-to-4 line decoder/demultiplexer

Philips Electronics 

Philips Semiconductors

Dual 2-to-4 line decoder/demultiplexer

Product specification

74HC/HCT139

Fig.4 Functional diagram.

FUNCTION TABLE

nE

H

L

L

L

L

INPUTS

nA0 nA1

X

X

L

L

H

L

L

H

H

H

nY0

H

L

H

H

H

OUTPUTS

nY1 nY2

H

H

H

H

L

H

H

L

H

H

nY3

H

H

H

H

L

Notes

1. H = HIGH voltage level

L = LOW voltage level

X = don’t care

Fig.5 Logic diagram (one decoder/demultiplexer).

September 1993

4

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