Hello Shaowei,
When the UJA1169 was developed, ISO26262 was not in use. In ISO26262 terminology, this means that the type is Quality Managed and does not have an ASIL-B level.
Relevant for ASIL levels is the failure rate:
Based upon lifetesting, in the amounts as prescribed by AEC-Q100, with 0 failures found, we can calculate a failure rate <10FIT, with 60% Confidence Level, at a junction temperature of 55°C. This failure rate equals an MTBF > 100M hours.
Based upon justified field returns, so excluding EOS/ESD and NTF, we can calculate an experienced field failure rate < 1FIT. For this calculation we assume 1.5 hours of operation per day, for each delivered product, this equals a typical automotive profile.
Best regards,
Tomas
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