HC157 데이터 시트보기 (PDF) - STMicroelectronics

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HC157

HC158 QUAD 2 CHANNEL MULTIPLEXER (INV.) HC157 QUAD 2 CHANNEL MULTIPLEXER

STMicroelectronics 

TRUTH TABLE

STROBE

H

L

L

L

L

X: DON’T CARE

INPUTS

SELECT

A

X

X

L

L

L

H

H

X

H

X

IEC LOGIC SYMBOL

HC157

M54/M74HC157 M54/M74HC158

OUTPUTS

B

Y (HC157)

Y (HC158)

X

L

H

X

L

H

X

H

L

L

L

H

H

H

L

HC158

LOGIC DIAGRAM

HC157

HC158

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