74VHCT240AMTC datasheet(4/7 Pages) FAIRCHILD

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AC Electrical Characteristics

Note 8: Parameter guaranteed by design. tOSLH = |tPLH max − tPLH min|; tOSHL = |tPHL max − tPHL min|

Note 9: 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)

TA = 25°C

TA = −40°C to +85°C

Units

Conditions

Min

Typ

Max

Min

Max

tPLH

Propagation Delay

5.0

± 0.5

5.6

7.8

1.0

9.0

CL = 15 pF

tPHL

Time

6.1

8.8

1.0

10.0

CL = 50 pF

tPZL

3-STATE Output

5.0

± 0.5

6.5

10.4

1.0

12.5

RL = 1 kΩ

CL = 15 pF

tPZH

Enable Time

7.3

11.4

1.0

13.5

CL = 50 pF

tPLZ

3-STATE Output

5.0

± 0.5

7.0

11.4

1.0

13.0

RL = 1 kΩ

CL = 50 pF

tPHZ

Disable Time

tOSLH

Output to

5.0

± 0.5

1.0

(Note 8)

tOSHL

Output Skew

CIN

Input

VCC = Open

Capacitance

COUT

Output

VCC = 5.0V

Capacitance

CPD

Power Dissipation

(Note 9)

Capacitance

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