HD74LVC240AFPEL datasheet(4/7 Pages) RENESAS

4 / 7 page

HD74LVC240A

Rev.4.00 Jul. 26, 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

—

7.5

3.3±0.3

1.5

—

6.5

Propagation delay time

tPLH

tPHL

5.0±0.5

—

5.0

2.7

—

9.0

3.3±0.3

1.5

—

8.0

Output enable time

tZH

tZL

5.0±0.5

—

6.5

2.7

—

8.0

3.3±0.3

1.5

—

7.0

Output disable time

tHZ

tLZ

5.0±0.5

—

6.0

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

1G, 2G

Input

Pulse generator

= 50

out

Ω

Output

500

C =

50 pF

450

OPEN

See under table

GND

Scope

Ω

1A1 to 2A4

1Y1 to 2Y4

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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