HD74LVC245ATELL datasheet(4/7 Pages) RENESAS

4 / 7 page

HD74LVC245A

Rev.4.00 Jul. 27, 2004 page 4 of 6

Switching Characteristics

Ta = –40 to 85°C

Item

Symbol

VCC (V)

Min

Typ

Max

Unit

From

(Input)

(Output)

2.7

——8.0

3.3±0.3

1.5

—

7.0

Propagation delay time

tPLH

tPHL

5.0±0.5

—

5.5

A or B

B or A

2.7

——9.5

3.3±0.3

1.5

—

8.5

Output enable time

tZH

tZL

5.0±0.5

—

7.0

A or B

2.7

——8.5

3.3±0.3

1.5

—

7.5

Output disable time

tZH

tLZ

5.0±0.5

—

6.5

A or B

2.7

———

3.3±0.3

—

1.0

Between output pins skew

tOSLH

tOSHL

5.0±0.5

—

1.0

Input capacitance

CIN

2.7

—

3.0

—

Output capacitance

2.7

—

15.0

—

Note:

1. This parameter is characterized but not tested.

tosLH = | tPLHm - tPLHn|, tosHL = | tPHLm - tPHLn|

Test Circuit

VCC

OPEN

See

under table

C =

50 pF

T / R

Pulse

Generator

Zout = 50 Ω

Input

500

Ω

GND

Output

VCC

450

Ω

Scope

Ω

Symbol

/ t

PLH

PHL

OPEN

GND

6 V

/ t

OPEN

GND

×Vcc

Vcc=2.7V,

3.3±0.3V

Vcc=5.0±0.5V

Note:

CL includes probe and jig capacitance.

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