74HC4020 Просмотр технического описания (PDF) - NXP Semiconductors.
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74HC4020 Datasheet PDF : 19 Pages
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Nexperia
74HC4020; 74HCT4020
14-stage binary ripple counter
Table 7. Dynamic characteristics …continued
GND (ground = 0 V); CL = 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
fmax
maximum see Figure 8
frequency
VCC = 4.5 V; CL = 50 pF
25 47 -
20
-
17
- MHz
VCC = 5.0 V; CL = 15 pF
- 52 -
-
-
-
- MHz
CPD
power
dissipation
capacitance
[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 W).
PD = CPD VCC2 fi + (CL VCC2 fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
(CL VCC2 fo) = sum of outputs;
CL = output load capacitance in pF;
VCC = supply voltage in V.
12. Waveforms
9,
05LQSXW
90
W:
9,
&3LQSXW
IPD[
WUHF
90
W3+/
4RU4Q
RXWSXW
W3/+
W7/+
W:
W3+/
90
W7+/
DDG
Fig 8.
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, pulse widths and measurement points
74HC_HCT4020
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 3 February 2016
.
9 of 19
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