74LVT245BDB datasheet(5/10 Pages) PHILIPS

Il numero della parte	74LVT245BDB

Spiegazioni elettronici	3.3V Octal transceiver with direction pin (3-State)

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Produttore elettronici	PHILIPS [NXP Semiconductors]

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Philips Semiconductors

Product specification

74LVT245B

3.3V Octal transceiver with direction pin (3-State)

1999 Mar 19

5

AC CHARACTERISTICS

GND = 0V; tR = tF = 2.5ns; CL = 50pF; RL = 500Ω; Tamb = –40°C to +85°C.

LIMITS

SYMBOL

PARAMETER

WAVEFORM

VCC = 3.3V +0.3V

VCC = 2.7V

UNIT

MIN

TYP1

MAX

tPLH

tPHL

Propagation delay

An to Bn or Bn to An

1

1.2

2.4

3.5

4.0

ns

tPZH

tPZL

Output enable time

to High and Low level

2

1.3

1.7

3.3

3.2

5.5

7.1

6.5

ns

tPHZ

tPLZ

Output disable time

from High and Low Level

2

2.2

3.6

3.4

5.9

5.0

6.5

5.1

ns

NOTES:

1. All typical values are at VCC = 3.3V and Tamb = 25°C.

AC WAVEFORMS

VM = 1.5V, VIN = GND to 2.7V

An or Bn

INPUT

VM

Bn or An

OUTPUT

VM

tPHL

tPLH

SA00192

Waveform 1. Input (An or Bn) to Output (Bn or An) Propagation

Delays

OE INPUT

tPZH

tPHZ

Bn or An

OUTPUT

VOH

An or Bn

OUTPUT

VOL

tPZL

tPLZ

3.0V

0V

VOL + 0.3V

VOH – 0.3V

2.7V

1.5V

0V

SV00106

Waveform 2. 3-State Output Enable and Disable Times

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