MC74HC4020ANG ON Semiconductor, MC74HC4020ANG Datasheet - Page 8
MC74HC4020ANG
Manufacturer Part Number
MC74HC4020ANG
Description
IC COUNTER RIPPLE 14STAGE 16DIP
Manufacturer
ON Semiconductor
Series
74HCr
Specifications of MC74HC4020ANG
Logic Type
Binary Counter
Direction
Up
Number Of Elements
1
Number Of Bits Per Element
14
Reset
Asynchronous
Count Rate
50MHz
Trigger Type
Negative Edge
Voltage - Supply
2 V ~ 6 V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Through Hole
Package / Case
16-DIP (0.300", 7.62mm)
Circuit Type
Silicon Gate
Current, Supply
160 μA
Function Type
14-Stages
Logic Function
Counter
Package Type
PDIP-16
Special Features
Binary, Ripple
Temperature, Operating, Range
-55 to +125 °C
Voltage, Supply
2 to 6 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Timing
-
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Other names
MC74HC4020ANGOS
Time−Base Generator
connected directly to a standard 120 Vac power line is
applied to the input of the MC54/74HC14A, Schmitt-trigger
inverter. The HC14A squares−up the input waveform and
A 60Hz sinewave obtained through a 1.0 Megohm resistor
120Vac
Reset
Clock
60Hz
Q10
Q12
Q13
Q14
Q4
Q5
Q6
Q7
Q8
Q9
NOTE:
Ground MUST be isolated
by a transformer or
opto−isolator for safety
reasons.
1
2
1.0M
≥20pF
4
8
V
CC
16
1/6 of HC14A
APPLICATIONS INFORMATION
Figure 8. Timing Diagram
32
Figure 9. Time−Base Generator
http://onsemi.com
64
Clock
HC4020A
8
V
128
CC
feeds the HC4020A. Selecting outputs Q5, Q10, Q11, and
Q12 causes a reset every 3600 clocks. The HC20 decodes the
counter outputs, produces a single (narrow) output pulse,
and resets the binary counter. The resulting output frequency
is 1.0 pulse/minute.
Q10
Q12
Q11
Q5
256
13
12
10
9
512
HC20
1/2
1024
8
2048
1
2
4
5
HC20
4096
1/2
6
8192
1.0 Pulse/Minute
Output
16384