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

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

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HD74HC190/HD74HC191

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

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