M74HC138M1R Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

M74HC138M1R

3 TO 8 LINE DECODER (INVERTING)

STMicroelectronics 

M74HC138

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 5.0

5 10

10

10 pF

CPD Power Dissipation

Capacitance (note 5.0

47

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)

WAVEFORM 1: PROPAGATION DELAYS FOR INVERTING OUTPUTS (f=1MHz; 50% duty cycle)

5/10

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