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744ALS245A-1D

Octal buffer 3-State

Philips Electronics 

Philips Semiconductors

Octal transceiver (3-State)

Product specification

74ALS245A/74ALS245A-1

DC ELECTRICAL CHARACTERISTICS

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

SYMBOL

PARAMETER

TEST CONDITIONS1

LIMITS

MIN TYP2 MAX

UNIT

VCC±10%, VIL = MAX,

IOH = –0.4mA VCC – 2

V

VOH

High-level output voltage

VIH = MIN

IOH = –3mA

2.4

3.2

V

VCC = MIN, VIL = MAX,

VIH = MIN

IOH = –15mA

2.0

V

VOL

Low-level output voltage

All versions

VCC = MIN, VIL = MAX,

VIH = MIN

IOL = 12mA

IOL = 24mA

-1 version

VCC = 4.75V, VIL = MAX,

VIH = MIN

IOL = 48mA

0.25 0.40

V

0.35 0.50

V

0.35 0.50

V

VIK

Input clamp voltage

VCC = MIN, II = IIK

–0.73 –1.5

V

II

Input current at maxi-

mum input voltage

OE or T/R VCC = MAX, VI = 7.0V

A or B ports VCC = MAX, VI = 5.5V

0.1

mA

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

SYMBOL

PARAMETER

tPLH

Propagation delay

tPHL

An to Bn, Bn to An

tPZH

Output enable time

tPZL

to High or Low level

tPHZ

Output disable time

tPLZ

from High or Low level

TEST CONDITION

Waveform 1

Waveform 2

Waveform 3

Waveform 2

Waveform 3

LIMITS

Tamb = 0°C to +70°C

VCC = +5.0V ± 10%

CL = 50pF, RL = 500Ω

MIN

MAX

2.0

10.0

2.0

10.0

3.0

20.0

3.0

20.0

2.0

10.0

4.0

15.0

UNIT

ns

ns

ns

1991 Jun 03

5

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