Transcript 7490 Decade Counter

7490 Decade Counter
Basic Integrated Circuit Counter
7490 Decade Counter
1
2
3
+5V
6
7
5
Clock
Input
14
CLK B
R0(1)
QD
11
R0(2)
QC
8
R9(1)
QB
9
R9(2)
QA
12
VCC
CLK A
7490
GND
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Modifying the count sequence
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Cascading Stages
SECONDS
(One’s Digit)
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
10
7490
SECONDS
(Ten’s Digit)
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10
Cascading Stages
SECONDS
(One’s Digit)
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
??
VCC
CLK A
GND
10
7490
SECONDS
(Ten’s Digit)
1
2
3
6
+5V
7
5
Input
14
CLK B
QD 11
R0(1)
R0(2)
QC
R9(1)
QB
R9(2)
QA
8
9
12
VCC
CLK A
GND
7490
10