HD74HC191RPEL データシートの表示（PDF） - Renesas Electronics

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HD74HC191RPEL

HD74HC190P HD74HC191P HD74HC190FPEL HD74HC191FPEL HD74HC190RPEL HD74HC191RPEL

Renesas Electronics 

HD74HC190, HD74HC191

Timing Chart

HD74HC191

Illustrated below is the following sequence:

1. Load (preset) to binary thirteen.

2. Count up to fourteen, fifteen (maximum), zero, one and two.

3. Inhibit

4. Count down to one, zero (minimum), fifteen, fourteen and thirteen.

Load

A

Data B

Inputs C

D

Clock

Down/Up

Enable G

QA

QB

QC

QD

Max/Min

Ripple

Clock

13 14 15 0 1 2 2

Count Up

Inhibit

Load

1 0 15 14 13

Count Down

Rev.3.00, Jan 31, 2006 page 4 of 12

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