HD74HC192 데이터 시트보기 (PDF) - Renesas Electronics

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HD74HC192

Synchronous Up/Down Decade Counter

Renesas Electronics 

HD74HC192, HD74HC193

Timing Chart

HD74HC193

Illustrated below is the following sequence:

1. Clear outputs to zero.

2. Load (preset) to binary thirteen.

3. Count up to fourteen, fifteen, zero, one and two.

4. Count down to one, zero, borrow, fifteen and thirteen.

Clear

Load

A

B

Data

Inputs C

D

Count Up

Count Down

QA

QB

Outputs

QC

QD

Carry

Borrow

0

13

Clear Preset

14 15 0 1 2

Count Up

1 0 15 14 13

Count Down

Rev.3.00, Jan 31, 2006 page 4 of 13

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