Nexperia

74HC393; 74HCT393

Dual 4-bit binary ripple counter

001aad538

output nQx

VOL

VOH

GND

VI

GND

VI

VM

tPHL

VM

input nMR

VM

tW

trec

input nCP

Measurement points are given in Table 8.

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

Fig. 10. Propagation delays clock (nCP) to output (nQx), pulse width master reset (nMR), and recovery time

master reset (nMR) to clock (nCP)

Table 8. Measurement points

Input

Output

Type

VM

VM

74HC393

0.5VCC

0.5VCC

74HCT393

1.3 V

1.3 V

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 9.

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. 11. Test circuit for measuring switching times

Table 9. Test data

Input

Load

Type

VI

tr, tf

CL

Test

74HC393

VCC

6.0 ns

15 pF, 50 pF

tPLH, tPHL

74HCT393

3.0 V

6.0 ns

15 pF, 50 pF

tPLH, tPHL

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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