1
2
3
4
(COM) VALUE=5
U1
1 0
CK
CL
14 1
CKA CKB
2 3 6 7
U3 Q0 Q1 Q2 Q3
12 9 8 11
7 1 2 6 4 5 3
R0(1) R0(2) R9(1) R9(2)
A B C D BI/RBO RBI LT
QA QB QC QD QE QF QG
13 12 11 10 9 15 14
74LS47
74LS90
LED1
1 1
LT
U2 14 1
2 3 6 7
CKA CKB
U4 Q0 Q1 Q2 Q3
12 9 8 11
7 1 2 6 4 5 3
R0(1) R0(2) R9(1) R9(2)
A B C D BI/RBO RBI LT
QA QB QC QD QE QF QG
13 12 11 10 9 15 14
74LS47
74LS90
LED10 5
6
7
8
U31
1
1 1
CK
CL
14 1
2 3 6 7
CKA CKB
R0(1) R0(2) R9(1) R9(2) 74LS90
Q0 Q1 Q2 Q3
2
12 9 8 11
4
(COM) VALUE=5
7 1 2 6 4 5 3
1 1
3
A B C D BI/RBO RBI LT
QA QB QC QD QE QF QG
13 12 11 10 9 15 14
74LS47
LT
LED1