Mata Kuliah
Dasar Teknik Digital
TKE 113
Departemen teknik Elektro
Universitas Sumatera Utara USU
2006
Ir. Pernantin Tarigan, M.Sc
Fahmi, S.T, M.Sc
Desember 2006 Ir. Pernantin, M.Sc 7
Pencacah tak beraturan:
flip-flop T, Diagram Rangkaian
A
T
A B
T
B C
T
C
TB= P(A + C) TA= P(B + C)
P
Desember 2006 Ir. Pernantin, M.Sc 8
Diagram waktu pencacah
irreguler
P
A
0 0 0 1 1 0 B
0 1 1 0 0 0
C
0 1 0 0 1 0 TA
TB
Desember 2006 Ir. Pernantin, M.Sc 9
Pencacah dengan flip-flop RS
A B C A+B+C+ RA SA RB SB RC SC Q Q+ R S
0 0 0 0 1 1 x 0 0 1 0 1 0 0 x 0
0 0 1 - - - x x x x x x 0 1 0 1
0 1 0 1 0 0 0 1 1 0 0 x 1 0 1 0
0 1 1 0 1 0 x 0 0 x 1 0 1 1 0 x
1 0 0 1 0 1 0 x 0 x 0 1
1 0 1 0 0 0 1 0 x 0 1 0
1 1 0 - - - x x x x x x
Desember 2006 Ir. Pernantin, M.Sc 11
Pencacah dengan flip-flop JK
A B C A+B+C+ JA KA JB KB JC KC Q Q+ J K
0 0 0 0 1 1 0 x 1 x 1 x 0 0 0 x
0 0 1 - - - x x x x x x 0 1 1 x
0 1 0 1 0 0 1 x x 1 0 x 1 0 x 1
0 1 1 0 1 0 0 x x 0 x 1 1 1 x 0
1 0 0 1 0 1 x 0 0 x 1 x
1 0 1 0 0 0 x 1 0 x x 1
1 1 0 - - - x x x x x x
1 1 1 - - - x x x x x x
Desember 2006 Ir. Pernantin, M.Sc 12
Peta-K Pencacah dengan JK
AB AB AB
C 00 01 11 10 C 00 01 11 10 C 00 01 11 10 0 0 1 x 1 0 1 0 x 0 0 1 0 x 1 1 x 0 x 0 1 x 1 x 0 1 x 0 x 0
A+ B+ C+
A A A
BC 0 1 0 1 BC 0 1 0 1 BC 0 1 0 1 00 x x 00 1 x x 00 1 1 x x 01 x x x 1 01 x x x 01 x x x 1 11 x x x 11 x x x 11 x x 1 x 10 1 x x x 10 x x 1 x 10
x x x
JA KA JB KB JC KC
Desember 2006 Ir. Pernantin, M.Sc 13
Peta-K Pencacah dengan ff D
AB AB AB
C 00 01 11 10 C 00 01 11 10 C 00 01 11 10 0 0 1 x 1 0 1 0 x 0 0 1 0 x 1 1 x 0 x 0 1 x 1 x 0 1 x 0 x 0
A+ B+ C+
