전자부품 반도체 검색엔진( 무료 PDF 다운로드 ) - 데이터시트뱅크
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M74HC390M1R 데이터 시트보기 (PDF) - STMicroelectronics
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M74HC390M1R
DUAL DECADE COUNTER
STMicroelectronics
M74HC390M1R Datasheet PDF : 13 Pages
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M54/M74HC390
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
COUNT
0
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OUTPUTS
BCD COUNT *
BI-QUINARY **
QD
QC
QB
QA
QA
QD
QC
QB
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
L
H
L
L
L
H
L
L
L
H
H
L
L
H
H
L
H
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H
L
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H
L
H
H
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L
H
H
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L
H
H
H
H
L
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L
H
H
H
L
L
H
H
H
L
L
INPUTS
CLOCK A
CLOCK B
CLEAR
X
X
H
X
L
X
L
Note: * Output QA is connected to input CLOCK B for BCD count.
** Output QD is connected to input CLOCK A for bi-quinary count.
OUTPUTS
QA
QB
QC
QD
L
L
L
L
BINARY COUNT UP
QUINARY COUNT UP
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