74ALS245AN datasheet(5/10 Pages) PHILIPS

No. de pieza	74ALS245AN

Descripción Electrónicos	Octal transceiver 3-State

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Fabricante Electrónico	PHILIPS [NXP Semiconductors]

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Philips Semiconductors

Product specification

74ALS245A/74ALS245A-1

Octal transceiver (3-State)

1991 Jun 03

5

DC ELECTRICAL CHARACTERISTICS

(Over recommended operating free-air temperature range unless otherwise noted.)

SYMBOL

PARAMETER

TEST CONDITIONS1

LIMITS

UNIT

SYMBOL

PARAMETER

TEST CONDITIONS1

MIN

TYP2

MAX

UNIT

VCC±10%, VIL = MAX,

IOH = –0.4mA

VCC – 2

V

VOH

High-level output voltage

CC

,

IL

,

VIH = MIN

IOH = –3mA

2.4

3.2

V

VOH

High level out ut voltage

VCC = MIN, VIL = MAX,

VIH = MIN

IOH = –15mA

2.0

V

All versions

VCC = MIN, VIL = MAX,

IOL = 12mA

0.25

0.40

V

VOL

Low-level output voltage

All versions

CC

,

IL

,

VIH = MIN

IOL = 24mA

0.35

0.50

V

VOL

Low level out ut voltage

-1 version

VCC = 4.75V, VIL = MAX,

VIH = MIN

IOL = 48mA

0.35

0.50

V

VIK

Input clamp voltage

VCC = MIN, II = IIK

–0.73

–1.5

V

I

Input current at maxi-

OE or T/R

VCC = MAX, VI = 7.0V

0.1

mA

II

mum input voltage

A or B ports

VCC = MAX, VI = 5.5V

0.1

mA

IIH

High-level input current3

VCC = MAX, VI = 2.7V

20

µA

IIL

Low-level input current3

VCC = MAX, VI = 0.4V

–0.1

mA

IO

Output current4

VCC = MAX, VO = 2.25V

–30

–112

mA

ICCH

28

45

mA

ICC

Supply current (total)

ICCL

VCC = MAX

40

55

mA

ICCZ

44

58

mA

NOTES:

1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.

2. All typical values are at VCC = 5V, Tamb = 25°C.

3. For I/O ports, the parameter IIH and IIL include the off-state current.

4. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.

AC ELECTRICAL CHARACTERISTICS

LIMITS

SYMBOL

PARAMETER

TEST CONDITION

Tamb = 0°C to +70°C

VCC = +5.0V ± 10%

CL = 50pF, RL = 500Ω

UNIT

MIN

MAX

tPLH

tPHL

Propagation delay

An to Bn, Bn to An

Waveform 1

2.0

10.0

ns

tPZH

tPZL

Output enable time

to High or Low level

Waveform 2

Waveform 3

3.0

20.0

ns

tPHZ

tPLZ

Output disable time

from High or Low level

Waveform 2

Waveform 3

2.0

4.0

10.0

15.0

ns

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