74VHCT74ATTR datasheet(5/14 Pages) STMICROELECTRONICS

部品番号	74VHCT74ATTR

部品情報	DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR

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74VHCT74A

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Table 8: Capacitive Characteristics

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without

load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/2 (per gate)

Figure 4: Test Circuit

CL =15/50pF or equivalent (includes jig and probe capacitance)

RT = ZOUT of pulse generator (typically 50Ω)

Symbol

Parameter

Test Condition

Value

Unit

TA = 25°C

-40 to 85°C

-55 to 125°C

Min.

Typ.

Max.

Min.

Max.

Min.

Max.

CIN

Input Capacitance

610

10

pF

CPD

Power Dissipation

Capacitance

(note 1)

21

pF

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