HD74LS193P 데이터 시트보기 (PDF) - Renesas Electronics

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HD74LS193P

Synchronous Up / Down Decade Counter (dual clock lines)

Renesas Electronics 

HD74LS193

Count Sequences

Clear

Load

A

Data B

Inputs C

D

Count Up

Count Down

QA

QB

Outputs

QC

QD

Carry

Borrow

0 13

14 15 0 1 2

Count Up

1 0 15 14 13

Count Down

Clear Preset

Illustrated below is the following sequence:

1. Clear outputs to zero.

2. Load (preset) to binary thirteen.

3. Count up to fourteen, fifteen, carry, zero, one and two.

4. Count down to one, zero, borrow, fifteen, fourteen, and thirteen.

Rev.2.00, Feb.18.2005, page 5 of 11

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