Nexperia

74HC390; 74HCT390

Dual decade ripple counter

001aah768

tW

tW

tr

tr

tf

VM

VI

negative

pulse

GND

VI

positive

pulse

GND

10 %

90 %

90 %

10 %

VM

VM

VM

tf

VCC

DUT

RT

VI

VO

CL

G

Test data is given in Table 10.

Definitions test circuit:

RT = Termination resistance should be equal to output impedance Zo of the pulse generator.

CL = Load capacitance including jig and probe capacitance.

Fig. 7. Test circuit for measuring switching times

Table 10. Test data

Input

Load

Type

VI

tr, tf

CL

Test

74HC390

VCC

6 ns

15 pF, 50 pF

tPLH, tPHL

74HCT390

3 V

6 ns

15 pF, 50 pF

tPLH, tPHL

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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