74HC4538D 데이터 시트보기 (PDF) - Nexperia B.V. All rights reserved

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74HC4538D

Dual retriggerable precision monostable multivibrator

Nexperia B.V. All rights reserved 

Nexperia

Table 8. Measurement points

Input

Output

VM

0.5VCC

VM

0.5VCC

74HC4538

Dual retriggerable precision monostable multivibrator

VX

0.1VCC

VY

0.9VCC

VI 90 %

tW

negative

pulse

VM

10 %

0V

tf

VI

positive

pulse

tr

90 %

VM

10 %

0V

tW

VM

tr

tf

VM

VI

G

VCC

VO

DUT

RT

VCC

RL S1

CL

open

001aad983

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.

RL = Load resistance.

S1 = Test selection switch

Figure 9. Test circuit for measuring switching times

Table 9. Test data

Input

VI

tr, tf

VCC

6 ns

Load

CL

15 pF, 50 pF

RL

1 kΩ

S1 position

tPHL, tPLH

open

74HC4538

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 5 — 17 March 2017

© Nexperia B.V. 2017. All rights reserved.

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