Datasheet
MOTOROLA CMOS LOGIC DATA
153
MC14040B
Figure 3. Timing Diagram
CLOCK
RESET
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
Q12
1 2 4 8 16 32 64 128 256 512 1024 2048 4096
APPLICATIONS INFORMATION
TIME–BASE GENERATOR
A 60 Hz sinewave obtained through a 1.0 Megohm resistor
connected directly to a standard 120 Vac power line is
applied to the clock input of the MC14040B. By selecting
outputs Q5, Q10, Q11, and Q12 division by 3600 is ac-
complished. The MC14012B decodes the counter outputs,
produces a single output pulse, and resets the binary count-
er. The resulting output frequency is 1.0 pulse/minute.
V
DD
V
SS
120 Vac
60 Hz
1.0 M
≥
20 pF
MC14040B
C
R Q12
Q11
Q10
Q5
1/2
MC14012B
1/2
MC14012B
1.0 PULSE/MINUTE
OUTPUT