Data Sheet

©
Nexperia B.V. 2017. All rights reserved
74HC_HCT4020 All information provided in this document is subject to legal disclaimers. .
Product data sheet Rev. 6 — 3 February 2016 9 of 19
Nexperia
74HC4020; 74HCT4020
14-stage binary ripple counter
[1] t
pd
is the same as t
PHL
and t
PLH
.
[2] t
t
is the same as t
THL
and t
TLH
.
[3] C
PD
is used to determine the dynamic power dissipation (P
D
in W).
P
D
= C
PD
 V
CC
2
 f
i
+ (C
L
 V
CC
2
 f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
 (C
L
 V
CC
2
 f
o
) = sum of outputs;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in V.
12. Waveforms
f
max
maximum
frequency
see Figure 8
V
CC
= 4.5 V; C
L
=50pF 25 47 - 20 - 17 - MHz
V
CC
= 5.0 V; C
L
=15pF - 52 - - - - - MHz
C
PD
power
dissipation
capacitance
[3]
-20- - - - - pF
Table 7. Dynamic characteristics …continued
GND (ground = 0 V); C
L
= 50 pF unless otherwise specified; for test circuit, see Figure 10
Symbol Parameter Conditions 25 C 40 C to +85 C 40 C to +125 C Unit
Min Typ Max Min Max Min Max
Measurement points are given in Table 8.
V
OL
and V
OH
are typical voltage output levels that occur with the output load.
Fig 8. Clock timing, propagation delays, pulse widths and measurement points
05LQSXW
 
 
&3
LQSXW
4RU4Q
RXWSXW
W
:
W
3+/
I
PD[
W
UHF
9
0
9
,
9
,
9
0
DDG
W
3/+
W
:
W
7/+
W
7+/
W
3+/
9
0