HD74HC192 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HD74HC192

Synchronous Up/Down Decade Counter (Dual Clock Line) Synchronous Up/Donw 4-bit Binary Counter (Dual Clock Line)

Hitachi -> Renesas Electronics 

HD74HC192/HD74HC193

Timing Chart

HD74HC192

Illustrated below is the following sequence:

1. Clear outputs to zero.

2. Load (preset) to binary seven.

3. Count up to eight, nine, zero, one and two.

4. Count down to one, zero, borrow, nine, eight and seven.

Clear

Load

A

B

Data

Inputs C

D

Count Up

Count Down

QA

QB

QC

QD

Carry

Borrow

Sequence

Illustrated

0

7

Clear Preset

89012

Count Up

10987

Count Down

5

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