Nexperia

74HC390; 74HCT390

Dual decade ripple counter

25 °C

-40 °C to

+85 °C

-40 °C to

+125 °C

Symbol Parameter

Conditions

Min Typ [1] Max

Min

Max

Min

Max

Unit

nCP0, nCP1; HIGH or LOW;

see Fig. 5

VCC = 4.5 V

18

8

-

23

-

27

-

ns

nMR HIGH; see Fig. 6

tW

pulse width

VCC = 4.5 V

17

10

-

21

-

26

-

ns

nMR to nCPn;see Fig. 6

trec

recovery time

VCC = 4.5 V

15

8

-

19

-

22

-

ns

nCPn; see Fig. 5

VCC = 4.5 V

27

55

-

22

-

18

-

MHz

fmax

maximum

frequency

VCC = 5 V; CL = 15 pF

-

61

-

-

-

-

-

MHz

CPD

power

dissipation

capacitance

CL = 50 pF; f = 1 MHz;

VI = GND to VCC - 1.5 V

[4]

-

21

-

-

-

-

-

pF

[1] All typical values are measured at Tamb = 25 °C.

[2] tpd is the same as tPLH and tPHL.

[3] tt is the same as tTHL and tTLH.

[4] CPD is used to determine the dynamic power dissipation (PD in μW).

PD = CPD × VCC 2 × fi × N + ∑(CL × VCC 2 × fo) where:

fi = input frequency in MHz;

fo = output frequency in MHz;

CL = output load capacitance in pF;

VCC = supply voltage in V;

N = number of inputs switching;

∑(CL × VCC 2 × fo) = sum of outputs.

74HC_HCT390

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 5 — 18 October 2021

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