74VHCT240A_07 datasheet(5/9 Pages) FAIRCHILD

部件名	74VHCT240A

功能描述	Octal Buffer/Line Driver with 3-STATE Outputs

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制造商	FAIRCHILD [Fairchild Semiconductor]

网页	http://www.fairchildsemi.com

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74VHCT240A Rev. 1.3

5

AC Electrical Characteristics

Notes:

7. Parameter guaranteed by design. tOSLH = |tPLH max – tPLH min|; tOSHL = |tPHL max – tPHL min|

8. CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating

current consumption without load. Average operating current can be obtained by the equation:

ICC (Opr.) = CPD • VCC • fIN + ICC / 8 (per F/F). The total CPD when n pcs. of the Octal D Flip-Flop operates

can be calculated by the equation: CPD (total) = 20 + 12n

Symbol

Parameter

VCC (V)

Conditions

TA = 25°C

TA = –40°C

to +85°C

Units

Min.

Typ.

Max.

Min.

Max.

tPLH, tPHL

Propagation Delay

Time

5.0 ± 0.5

CL = 15pF

5.6

7.8

1.0

9.0

ns

CL = 50pF

6.1

8.8

1.0

10.0

tPZL, tPZH

3-STATE Output

Enable Time

5.0 ± 0.5 RL = 1kΩ CL = 15pF

6.5

10.4

1.0

12.5

ns

CL = 50pF

7.3

11.4

1.0

13.5

tPLZ, tPHZ

3-STATE Output

Disable Time

5.0 ± 0.5 RL = 1kΩ CL = 50pF

7.0

11.4

1.0

13.0

ns

tOSLH, tOSHL Output to Output

Skew

5.0 ± 0.5 (7)

1.0

ns

CIN

Input Capacitance

VCC = Open

4

10

pF

COUT

Output Capacitance

VCC = 5.0V

9

pF

CPD

Power Dissipation

Capacitance

(8)

19

pF

类似零件编号 - 74VHCT240A_07

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