Advertisement
W
1
0
A
1
B
C
x
y
D
E
W
0
0
A
1
B
C
x
y
D
E
t
W
1
x
A
y
B
C
z
D
E
MC14530B
6–336
SEQUENTIAL LOGIC APPLICATIONS
COINCIDENT FLIP–FLOP
Z
x
y
Q n+1
0
0
0
0
1
Q
0
0
Q
1
1
1
ASTABLE MULTIVIBRATOR
x
y
Q n+1
Z
0
0
1
0
1
2τ
1
0
2τ
1
1
1
COINCIDENT FLIP–FLOP
t x
y
z
Q n+1
0
0
0
0
Z
0
0
1
Q n
0
1
0
Q n
0
1
1
Q n
1
0
0
Q n
1
0
1
Q n
1
1
0
Qn
1
1
1
1
A flip–flop that will change only when both inputs agree.
A flip–flop with three output conditions, where the third state is
in oscillation between "1" and "0". The period of oscillation is
twice the delay of the gate and the feedback element.
The flip–flop changes state only when all "1's" or all "0's" are
entered. This configuration may be extended by cascading M 5
gates to cover n–inputs where all inputs must be "1's" or "0's"
before the output will change. As an example, this configura-
tion is useful for controlling an n–stage up/down counter that is
to cycle from a minimum to maximum count and back again
without flipping over (from all "1's" to all "0's".)
MOTOROLA CMOS LOGIC DATA
Advertisement
