74HC4020N Просмотр технического описания (PDF) - Philips Electronics

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74HC4020N

14-stage binary ripple counter

Philips Electronics 

Philips Semiconductors

14-stage binary ripple counter

Fig.4 Functional diagram.

Fig.5 Logic diagram.

Product specification

74HC/HCT4020

FUNCTION TABLE

INPUTS

CP

MR

↑

L

↓

L

X

H

OUTPUTS

Q0, Q3 to Q13

no change

count

L

Notes

1. H = HIGH voltage level

L = LOW voltage level

X = don’t care

↑ = LOW-to-HIGH clock

transition

↓ = HIGH-to-LOW clock

transition

September 1993

Fig.6 Timing diagram.

4

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