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MC74AC4020 fiches techniques PDF

Motorola Semiconductors - 14-STAGE BINARY RIPPLE COUNTER

Numéro de référence MC74AC4020
Description 14-STAGE BINARY RIPPLE COUNTER
Fabricant Motorola Semiconductors 
Logo Motorola Semiconductors 





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MC74AC4020 fiche technique
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MC74AC4020
14ĆStage 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
VCC Q11 Q10 Q8 Q9 RESET CLK Q1
16 15 14 13 12 11 10 9
14-STAGE
BINARY RIPPLE
COUNTER
N SUFFIX
CASE 648-08
PLASTIC
12345678
Q12 Q13 Q14 Q6 Q5 Q7 Q4 GND
FUNCTION TABLE
Clock Reset
L
L
XH
Output State
No Change
Advance to next state
All Outputs are low
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC DIAGRAM
10
CLOCK
9
Q1
7
Q4
5
Q5
4
Q6
6
Q7
13
Q8
12
Q9
14
Q10
15
Q11
1
Q12
2
Q13
3
Q14
11
RESET
PIN 16 = VCC
PIN 8 = GND
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FACT DATA
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