74LVT245BPW datasheet(8/15 Pages) NXP

Il numero della parte	74LVT245BPW

Spiegazioni elettronici	3.3 V octal transceiver with direction pin (3-state)

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74LVT245B_2

Product data sheet

Rev. 02 — 8 May 2008

8 of 15

NXP Semiconductors

74LVT245B

3.3 V octal transceiver with direction pin (3-state)

Table 8.

Measurement points

VCC

Input

Output

VIN

VM

Vx

Vy

2.7 V to 3.6 V

GND to 2.7 V

1.5 V

VOL + 0.3 V

VOH − 0.3 V

Test data is given in Table 9.

Deﬁnitions test circuit:

RL = Load resistance;

CL = Load capacitance including jig and probe capacitance;

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

VEXT = External voltage for measuring switching times.

Fig 7.

Test circuit for switching times

VEXT

VCC

VI

VO

001aae235

DUT

CL

RT

RL

PULSE

GENERATOR

VM

tW

10 %

90 %

0 V

VI

negative

pulse

positive

pulse

0 V

VM

90 %

10 %

tf

tr

tf

Table 9.

Test data

Input

Load

VEXT

VI

fi

tW

tr, tf

RL

CL

tPHZ, tPZH

tPLZ, tPZL

tPLH, tPHL

2.7 V

≤ 10 MHz

500 ns

≤ 2.5 ns

500

Ω

50 pF

GND

6 V

open

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