Nexperia

74HC393; 74HCT393

Dual 4-bit binary ripple counter

25 °C

-40 °C to

+85 °C

-40 °C to

+125 °C

Symbol Parameter

Conditions

Min

Typ

Max

Min

Max

Min

Max

Unit

nCP HIGH or LOW; see Fig. 9

VCC = 4.5 V

19

11

-

24

-

29

-

ns

nMR HIGH; see Fig. 10

tW

pulse width

VCC = 4.5 V

16

6

-

20

-

24

-

ns

nMR to nCP; see Fig. 10

trec

recovery time

VCC = 4.5 V

5

0

-

5

-

5

-

ns

see Fig. 9

VCC = 4.5 V

27

48

-

22

-

18

-

MHz

fclk(max) maximum

clock

frequency

VCC = 5 V; CL = 15 pF

-

53

-

-

-

-

-

MHz

CPD

power

dissipation

capacitance

CL = 50 pF; f = 1 MHz;

VI = GND to VCC - 1.5 V

[3]

-

25

-

-

-

-

-

pF

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

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

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

PD = CPD × VCC 2 × fi × N + Σ(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;

Σ(CL × VCC 2 × fo) = sum of outputs.

10.1. Waveforms

001aad537

VM

VM

tPLH

tTLH

tTHL

tPHL

input nCP

VI

GND

VOH

VOL

1/fmax

output nQx

Measurement points are given in Table 8.

VOL and VOH are the typical output voltage levels that occur with the output load.

Fig. 9. Propagation delays clock (nCP) to output (nQx), the output transition times and the maximum clock

frequency

74HC_HCT393

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 8 — 22 October 2021

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