M54HC157 datasheet(5/9 Pages) STMICROELECTRONICS

Teilenummer	M54HC157

Bauteilbeschribung	RAD-HARD QUAD 2 CHANNEL MULTIPLEXER

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

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M54HC157

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Table 7: Capacitive Characteristics

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 xVCC xfIN +ICC/4(per chan-

nel)

Figure 4: Test Circuit

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

RT =ZOUT of pulse generator (typically 50Ω)

Figure 5: Waveform - Propagation Delay Times (f=1MHz; 50% duty cycle)

Symbol

Parameter

Test Condition

Value

Unit

VCC

(V)

TA = 25°C

-40 to 85°C

-55 to 125°C

Min.

Typ.

Max.

Min.

Max.

Min.

Max.

CIN

Input Capacitance

5.0

CPD

Power Dissipation

Capacitance (note

5.0

M54HC157 Datenblatt(PDF) 5 Page - STMicroelectronics