74HC540 Просмотр технического описания (PDF) - NXP Semiconductors.

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74HC540

Octal buffer/line driver; 3-state; inverting

NXP Semiconductors. 

NXP Semiconductors

74HC540; 74HCT540

Octal buffer/line driver; 3-state; inverting

tW

VI 90 %

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

Fig 8.

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

Test circuit for measuring switching times

Table 9. Test data

Type

Input

74HC540

74HCT540

VI

tr, tf

VCC

6 ns

3V

6 ns

Load

CL

15 pF, 50 pF

15 pF, 50 pF

RL

1 k

1 k

S1 position

tPHL, tPLH

open

open

tPZH, tPHZ

GND

GND

tPZL, tPLZ

VCC

VCC

74HC_HCT540

Product data sheet

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

Rev. 3 — 21 January 2013

© NXP B.V. 2013. All rights reserved.

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