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MC74AC4020N データシート(PDF) 1 Page - Motorola, Inc

部品番号 MC74AC4020N
部品情報  14-STAGE BINARY RIPPLE COUNTER
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メーカー  MOTOROLA [Motorola, Inc]
ホームページ  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC74AC4020N データシート(HTML) 1 Page - Motorola, Inc

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FACT DATA
14Stage Binary Ripple Counter
The MC74AC4020 consists of 14 master-slave flip-flops with 12 stages
brought out to pins. The output of each flip-flop feeds the next and the frequency
at each output is half that of the preceding one. The state of the counter
advances on the negative-going edge of the Clock input. Reset is asynchronous
and active-high.
State changes of the Q outputs do not occur simultaneously because of internal
ripple delays. Therefore, decoded output signals are subject to decoding spikes
and may have to be gated with the Clock of the MC74AC4020 for some designs.
• 140 MHz Typ. Clock
• Outputs Source/Sink 24 mA
• Operating Voltage Range: 2.0 to 6.0 V
• High Noise Immunity
15
16
14
13
12
11
10
2
1
3
4
5
6
7
VCC
9
8
Q11
Q10
Q8
Q9
RESET CLK
Q1
Q12
Q13
Q14
Q6
Q5
Q7
Q4
GND
FUNCTION TABLE
Clock
Reset
Output State
L
No Change
L
Advance to next state
X
H
All Outputs are low
MC74AC4020
14-STAGE
BINARY RIPPLE
COUNTER
N SUFFIX
CASE 648-08
PLASTIC
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC DIAGRAM
CLOCK
10
11
RESET
PIN 16 = VCC
PIN 8 = GND
9
7
5
4
6
13
12
14
15
1
2
3
Q1
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
Q12
Q13
Q14


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