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MC74HC4040A 数据表(PDF) 6 Page - ON Semiconductor

部件名 MC74HC4040A
功能描述  12-Stage Binary Ripple Counter
Download  8 Pages
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

MC74HC4040A 数据表(HTML) 6 Page - ON Semiconductor

  MC74HC4040A Datasheet HTML 1Page - ON Semiconductor MC74HC4040A Datasheet HTML 2Page - ON Semiconductor MC74HC4040A Datasheet HTML 3Page - ON Semiconductor MC74HC4040A Datasheet HTML 4Page - ON Semiconductor MC74HC4040A Datasheet HTML 5Page - ON Semiconductor MC74HC4040A Datasheet HTML 6Page - ON Semiconductor MC74HC4040A Datasheet HTML 7Page - ON Semiconductor MC74HC4040A Datasheet HTML 8Page - ON Semiconductor  
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MC74HC4040A
http://onsemi.com
6
Clock
Reset
Q1
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q10
Q11
Figure 6. Timing Diagram
Q9
Q12
APPLICATIONS INFORMATION
Time–Base Generator
A 60Hz sinewave obtained through a 100 K resistor
connected to a 120 Vac power line through a step down
transformer is applied to the input of the MC54/74HC14A,
Schmitt-trigger inverter. The HC14A squares–up the input
waveform and feeds the HC4040A. 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.
HC4040A
Figure 7. Time–Base Generator
Clock
Q5
Q10
Q11
Q12
VCC
13
12
10
9
1
2
4
5
8
1/2
HC20
1/2
HC20
6
1/6 of HC14A
≥20 pF
100 K
1.0 Pulse/Minute
Output
VCC
110 Vac
15 – 30
Volts


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