Datasheet

74HC_HCT4020 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 5 — 6 August 2012 10 of 20
NXP Semiconductors
74HC4020; 74HCT4020
14-stage binary ripple counter
Measurement points are given in Table 8.
V
OL
and V
OH
are typical voltage output levels that occur with the output load.
Fig 9. Waveforms showing the output Qn to output Qn+1 propagation delays
001aai120
Qn output
t
PLH
t
PHL
V
OH
V
OH
V
OL
V
OL
V
M
V
M
Qn+1 output
Table 8. Measurement points
Type Input Output
V
M
V
M
74HC4020 0.5  V
CC
0.5  V
CC
74HCT4020 1.3 V 1.3 V