HD74LS193 Datasheet, PDF(5/12 Page) Hitachi Semiconductor – Synchronous Up/Down 4-bit Binary Counters(dual clock lines)

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HD74LS193 Datasheet, PDF (5/12 Pages) Hitachi Semiconductor – Synchronous Up/Down 4-bit Binary Counters(dual clock lines)

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HD74LS193

Count Sequences

Clear

Load

Data B

Inputs C

Count Up

Count Down

Outputs

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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