M74HC238 데이터 시트보기 (PDF) - STMicroelectronics

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M74HC238

3 TO 8 LINE DECODER

STMicroelectronics 

M74HC238

CAPACITIVE CHARACTERISTICS

Test Conditions

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 5.0

5 10

10

10 pF

CPD Power Dissipation

Capacitance (note 5.0

53

pF

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

RT = ZOUT of pulse generator (typically 50Ω)

5/10

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