HD74HC668 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HD74HC668

Synchronous UP/Down Decade Counter Synchronous Up/Down 4-bit binary Counter

Hitachi -> Renesas Electronics 

HD74HC669

Load

A

B

Data

inputs

C

D

Clock

U/D

P and T

QA

QB

QC

QD

Ripple

carry

output

13

14

15

012

HD74HC668/HD74HC669

2

2

1

0

15

14

13

Load

Count up

Inhibit

Count down

7

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