M54HC298F1R 데이터 시트보기 (PDF) - STMicroelectronics

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M54HC298F1R

QUAD 2 CHANNEL MULTIPLEXER/REGISTER

STMicroelectronics 

M54/M74HC298

TRUTH TABLE

INPUTS

OUTPUTS

WORD SELECT

CLOCK

QA

QB

QC

QD

L

a1

b1

c1

d1

H

a2

b2

c2

d2

X

QA0

QB0

QC0

QD0

X

: DON’T CARE (INCLUDING TRANSITION)

a1, a2, ETC : THE LEVEL OF STEAY STATE INPUT AT a1, a2, etc.

QA0, QB0, ETC : THE LEVEL OF QA, QB, ETC ENTERED ON THE MOST RECENT NEGATIVE TRANSITION OF THE CLOCK INPUT.

LOGIC DIAGRAM

2/11

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