74VHCT74A(2004) 데이터 시트보기 (PDF) - STMicroelectronics

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74VHCT74A
(Rev.:2004)

DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR

STMicroelectronics 

74VHCT74A

Table 8: Capacitive Characteristics

Test Condition

Value

Symbol

Parameter

TA = 25°C

-40 to 85°C -55 to 125°C Unit

CIN Input Capacitance

CPD Power Dissipation

Capacitance

(note 1)

Min. Typ. Max. Min. Max. Min. Max.

6 10

10

10 pF

21

pF

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)

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