74LVX238M(2001) 查看數據表（PDF） - STMicroelectronics

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74LVX238M
(Rev.:2001)

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

STMicroelectronics 

74LVX238

CAPACITIVE CHARACTERISTICS

Test Condition

Value

Symbol

Parameter

VCC

(V)

TA = 25°C

-40 to 85°C -55 to 125°C Unit

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

CIN Input Capacitance 3.3

4 10

10

10 pF

CPD Power Dissipation

Capacitance

3.3

fIN = 10MHz

34

pF

(note 1)

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

TEST CIRCUIT

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

RT = ZOUT of pulse generator (typically 50Ω)

5/9

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