M54HC157 datasheet(5/9 Pages) STMICROELECTRONICS

部件名	M54HC157

功能描述	RAD-HARD QUAD 2 CHANNEL MULTIPLEXER

PDF	9 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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5 / 9 page

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

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