74LVX238M 查看數據表（PDF） - STMicroelectronics

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74LVX238M

LOW VOLTAGE CMOS 3 TO 8 LINE DECODER WITH 5V TOLERANT INPUTS

STMicroelectronics 

74LVX238

Table 9: Capacitive Characteristics

Test Condition

Value

Symbol

Parameter

VCC

(V)

CIN Input Capacitance 3.3

CPD Power Dissipation

Capacitance

3.3

(note 1)

fIN = 10MHz

TA = 25°C

-40 to 85°C -55 to 125°C Unit

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

4 10

10

10 pF

34

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

Figure 4: Test Circuit

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

RT = ZOUT of pulse generator (typically 50Ω)

Figure 5: Waveform - Propagation Delays For Inverting Outputs (f=1MHz; 50% duty cycle)

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