M54HC298 Просмотр технического описания (PDF) - STMicroelectronics
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M54HC298 Datasheet PDF : 11 Pages
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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
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