HCC40192B 查看數據表（PDF） - STMicroelectronics

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HCC40192B

PRESETTABLE UP/DOWN COUNTERS (DUAL CLOCK WITH RESET) 40192B – BCD TYPE 40193B – BINARY TYPE

STMicroelectronics 

Internal Logic of Flip-flop.

HCC/HCF40192B/193B

TRUTH TABLE

Clock

Up

–/–

–\–

1

1

X

X

1 = High Level

Clock

Down

1

1

–/–

–\–

X

X

0 = Low Level X = Don’t Care.

Preset

Enable

1

1

1

1

0

X

Reset

0

0

0

0

0

1

Action

Count Up

No Count

Count Down

No Count

Preset

Reset

5/15

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