74HC_HCT4020

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Product data sheet

Rev. 6 — 3 February 2016

4 of 19

NXP Semiconductors

74HC4020; 74HCT4020

14-stage binary ripple counter

7.

Functional description

[1]

H = HIGH voltage level; L = LOW voltage level; X = don’t care;

 = LOW-to-HIGH clock transition;  = HIGH-to-LOW clock transition.

7.1 Timing diagram

Table 3.

Function table

Input

Output

CP

MR

Q0, Q3 to Q13



L

no change



L

count

XH

L

Fig 7.

Timing diagram