5

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Timing Diagrams

CD40192BC

Sequence:

1. Clear outputs to zero.

2. Load (preset) to BCD seven.

3. Count up to eight, nine, carry, zero, one and two.

4. Count down to one, zero, borrow, nine, eight and seven.

CD40193BC

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.