參數(shù)資料
型號(hào): TSS461CVAN
英文描述: Van Controller Serial Interface
中文描述: 范控制器串行接口
文件頁(yè)數(shù): 19/24頁(yè)
文件大?。?/td> 215K
代理商: TSS461CVAN
Qualpack TSS463 / TSS461C
Rev. 2 – January 1999
19
4.5.5 EFR (Early Failure Rate)
The EFR is measured on a sample of devices by operating them at an elevated temperature and
measuring the number which fails to meet specification after 12 hours at 150°C. The figure is expressed
in terms of ppm.
0
200
400
600
800
1000
Year
p
1991
1992
1993
1994
1995
1996
1997
1998 (Obj)
4.5.6 LFR (Latent Failure Rate)
The LFR is measured by operating devices at elevated temperatures for 1000 hours and measuring the
failure rate. Using the Arrhenius law, the expected failure rate at a operating temperature of 55°C is
calculated using an activation Energy of 0.6 eV with a confidence level of 60%. This is expressed in units
per billion hours (FIT).
0
20
40
60
80
100
Year
F
1991
1992
1993
1994
1995
1996
1997
1998 (Obj)
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