FVXO-PC52B-200.0-299.99 데이터 시트보기 (PDF) - Unspecified

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FVXO-PC52B-200.0-299.99

LVPECL 5 x 3.2mm 2.5V VCXO

Unspecified 

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MTTF / FITS Calculations

Products are grouped together by process for MTTF calculations.

(All XpressO output and package types are manufactured with the same process)

Number of Parts Tested: 360 (120 of each output type: HCMOS, LVDS, LVPECL)

Number of Failures: 0

Test Temperature: 125°C

Number of Hours: 2000

MTTF was calculated using the following formulas:

[1.] Device Hours (devhrs) = (number of devices) x (hours at elevated temperature in °K)

[2.]

MTTF

=

devhrs × af

χ2

×2

[3.] FITS =

Where:

Label

1

* 109

MTTF

Name

af

Acceleration Factor

eV

Activation Energy

k

Bolzman’s Constant

Formula/Value

e( eV )×( 1 − 1 )

k t1 t2

0.40 V

8.62 X 10-5 eV/°K

t1

t2

Θ

Theta

Operating Temperature (°K)

Accelerated Temperature (°K)

Confidence Level (60% industry standard)

r

Failures

χ2

Chi-Square

Number of failed devices

statistical significance for bivariate tabular analysis [table look-

up] based on assumed Θ (Theta – confidence) and number of

failures (r) For zero failures (60% Confidence): χ2 = 1.830

DEVICE-HOURS = 360 x 2000 HOURS = 720,000

e ACCELERATION FACTOR =

( 0.40 )×( 1 − 1 )

8.625 298 398 = 49.91009

MTTF = 720,000 × 49.91009 × 2 = 39,209,238 Hours

1.833

Failure Rate =

1.833

= 2.55E-8

720,000 × 49.91009 × 2

FITS = Failure Rate *1E9 = 26

Page 14 of 15

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