HD74HC161P Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD74HC161P

Synchronous Decade Counter (Direct Clear)/Synchronous 4-bit Binary Counter (Direct Clear)/Synchronous Decade Counter (Synchronous Clear)/Synchronous 4-bit Binary Counter (Synchronous Clear)

Hitachi -> Renesas Electronics 

HD74HC160/HD74HC161/HD74HC162/HD74HC163

Timing Diagram

HD74HC160/HD74HC162

Sequence illustrated in waveforms.

1. Clear outputs to zero.

2. Preset to BCD seven.

3. Count to eight, nine, zero, one, two and three.

4. Inhibit

Clear(HC160)

Clear(HC162)

Load

A

Data B

Inputs C

D

Clock(HC160)

Clock(HC162)

Enable P

Count

Enables Enable T

QA

QB

Outputs

QC

QD

Ripple

Carry

Output

(Asynchronous)

(Synchronous)

789 0 1 2 3

Clear Load

Count

Inhibit

6

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