TC74LVX240F_07 datasheet(5/9 Pages) TOSHIBA

No de pièce	TC74LVX240F

Description	Octal Bus Buffer

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Fabricant	TOSHIBA [Toshiba Semiconductor]

Site Internet	http://www.semicon.toshiba.co.jp/eng

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5 / 9 page

TC74LVX240,244F/FT

2007-10-17

5

AC Characteristics (input: tr = tf = 3 ns)

Ta

= 25°C

Ta

= −40 to

85°C

Characteristics

Symbol

Test Condition

VCC (V) CL (pF)

Min

Typ.

Max

Min

Max

Unit

15

⎯

5.7

10.1

1.0

12.5

tpLH

2.7

50

⎯

8.2

13.6

1.0

16.0

15

⎯

4.3

6.2

1.0

7.5

Propagation delay time

(TC74LVX240)

tpHL

⎯

3.3

± 0.3

50

⎯

6.8

9.7

1.0

11.0

ns

15

⎯

6.1

11.4

1.0

13.5

tpLH

2.7

50

⎯

8.6

14.9

1.0

17.0

15

⎯

4.7

7.1

1.0

8.5

Propagation delay time

(TC74LVX244)

tpHL

⎯

3.3

± 0.3

50

⎯

7.2

10.6

1.0

12.0

ns

15

⎯

7.1

13.8

1.0

16.5

tpZL

2.7

50

⎯

9.6

17.3

1.0

20.0

15

⎯

5.5

8.8

1.0

10.5

Output enable time

tpZH

RL = 1 kΩ

3.3

± 0.3

50

⎯

8.0

12.3

1.0

14.0

ns

tpLZ

2.7

50

⎯

11.6

16.0

1.0

19.0

Output disable time

tpHZ

RL = 1 kΩ

3.3

± 0.3

50

⎯

9.7

11.4

1.0

13.0

ns

2.7

50

⎯

1.5

⎯

1.5

Output to output skew

tosLH

tosHL

(Note 1)

3.3

± 0.3

50

⎯

1.5

⎯

1.5

ns

Input capacitance

CIN

(Note 2)

⎯

4

10

⎯

10

pF

Output capacitance

COUT

⎯

6

⎯

pF

TC74LVX240

⎯

17

⎯

Power dissipation capacitance

(Note 3)

CPD

TC74LVX244

⎯

19

⎯

pF

Note 1: Parameter guaranteed by design.

(tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|)

Note 2: Parameter guaranteed by design.

Note 3: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating

current consumption.

Average operating current can be obtained by the equation:

ICC (opr) = CPD･VCC･fIN + ICC/8 (per bit)

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