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)
??
