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2

Function Tables

BCD Count Sequence (Note 1)

BCD Bi-Quinary (5-2) (Note 2)

Reset/Count Function Table

H

= HIGH Level

L

= LOW Level

X

= Don’t Care

Note 1: Output QA is connected to input B for BCD count.

Note 2: Output QD is connected to input A for bi-quinary count

Logic Diagram

The J and K inputs shown without connection are for reference only and

are functionally at a HIGH level.

Count

Outputs

0

L

LLL

1L

L

L

H

2L

L

H

L

3L

L

H

H

4L

H

L

L

5L

H

L

H

6L

H

H

L

7L

H

H

H

8

H

LLL

9H

L

L

H

Count

Outputs

0

L

LLL

1L

L

L

H

2L

L

H

L

3L

L

H

H

4L

H

L

L

5

H

LLL

6H

L

L

H

7H

L

H

L

8H

L

H

H

9H

H

L

L

Reset Inputs

Outputs

R0(1)

R0(2)

R9(1)

R9(2)

H

H

L

X

LLLL

H

H

X

L

LLLL

XX

H

H

H

L

L

H

X

L

X

L

COUNT

L

X

L

X

COUNT

L

X

X

L

COUNT

X

L

L

X

COUNT