74HC4020 데이터 시트보기 (PDF) - Nexperia B.V. All rights reserved
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74HC4020 Datasheet PDF : 17 Pages
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Nexperia
74HC4020; 74HCT4020
14-stage binary ripple counter
Symbol Parameter
fmax
maximum
frequency
CPD
power
dissipation
capacitance
Conditions
see Fig. 8
VCC = 4.5 V
VCC = 5.0 V; CL = 15 pF
25 °C
-40 °C to +85 °C -40 °C to +125 °C Unit
Min Typ Max Min Max
Min
Max
25 47 -
20
-
17
- MHz
- 52 -
-
-
-
- MHz
[3] - 20 -
-
-
-
- pF
[1] tpd is the same as tPHL and tPLH.
[2] tt is the same as tTHL and tTLH.
[3] CPD is used to determine the dynamic power dissipation (PD in μW).
PD = CPD x VCC 2 x fi + Σ (CL x VCC 2 x fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
Σ (CL x VCC 2 x fo) = sum of outputs;
CL = output load capacitance in pF;
VCC = supply voltage in V.
11.1. Waveforms and test circuit
VI
MR input
VM
tW
VI
CP input
1/fmax
trec
VM
Fig. 8.
tPHL
tW
tPLH
tPHL
Q0 or Qn
output
10 %
90 %
90 %
VM
10 %
tTLH
tTHL
001aad590
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Clock timing, propagation delays and pulse widths
74HC_HCT4020
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 7 — 18 June 2020
© Nexperia B.V. 2020. All rights reserved
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