HCF40193B_02 查看數據表（PDF） - STMicroelectronics

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产品描述 (功能)

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HCF40193B_02

PRESETTABLE UP/DOWN COUNTERS (DUAL CLOCK WITH RESET) BINARY TYPE

STMicroelectronics 

LOGIC DIAGRAM

HCF40193B

TRUTH TABLE

CLOCK UP

H

H

X

X

(X) : Don’t Care

CLOCK DOWN

H

H

X

X

PRESET ENABLE

H

H

H

H

L

X

RESET

L

L

L

L

L

H

ACTION

COUNT UP

NO COUNT

COUNT DOWN

NO COUNT

PRESET

RESET

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