7490 Decade Counter

7490 Decade Counter

Basic Integrated Circuit Counter7490 Decade Counter

Clock

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Modifying the count sequence

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

Cascading Stages

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

SECONDS(One’s Digit)

SECONDS(Ten’s Digit)

Cascading Stages

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

R9(1)

CLK A

7490

QA

QB

QC

QD

CLK B

R9(2)

R0(1)

R0(2)

14

7

6

3

2

VCC

GNDInput

5

10

1

12

9

8

11

+5V

SECONDS(One’s Digit)

SECONDS(Ten’s Digit)

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