HD74HC190 Datasheet, PDF(4/13 Page) Hitachi Semiconductor – Synchronous Up/Down Decade,4-bit Binary Counter(Single Clock Line)

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

HD74HC190 Datasheet, PDF (4/13 Pages) Hitachi Semiconductor – Synchronous Up/Down Decade,4-bit Binary Counter(Single Clock Line)

◁

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

Data B

Inputs C

Clock

Down/Up

Enable G

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

▷