HD74LS190 Ver la hoja de datos (PDF) - Renesas Electronics

Número de pieza

componentes Descripción

Lista de partido

HD74LS190

Synchronous Up / Down Decade Counter (signal clock line)

Renesas Electronics 

HD74LS190

Count Sequences

Load

A

B

C

D

Clock

Down/Up

Enable G

QA

QB

QC

QD

Max/Min

Ripple

Clock

7 8 9 0 12

22 1 0 9 8 7

Load

Count Up

Inhibit

Count Down

Illustrated below is the following sequence:

1. Load (preset) to BCD seven.

2. Count up to eight, nine (maximum), zero, one and two.

3. Inhibit

4. Count down to one, zero (minimum), nine, eight, and seven.

Rev.3.00, Jul.15.2005, page 6 of 10

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