SFFS339 December   2022 TLIN1431-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Hardware Component Failure Modes Effects and Diagnostics Analysis (FMEDA)
    1. 2.1 Random Fault Estimation
      1. 2.1.1 Fault Rate Estimation Theory for Packaging
      2. 2.1.2 Fault Estimation Theory for Silicon Permanent Faults
      3. 2.1.3 Fault Estimation Theory for Silicon Transient Faults
      4. 2.1.4 The Classification of Failure Categories and Calculation
  4. 3Using the FMEDA Spreadsheet Tool
    1. 3.1 Mission Profile Tailoring Tab
      1. 3.1.1 Geographical Location
      2. 3.1.2 Life Cycle
      3. 3.1.3 Use Case Thermal Management Control (Theta-Ja) and Use Case Power
      4. 3.1.4 Safe vs Non-Safe (Safe Fail Fraction) for Each Component Type
      5. 3.1.5 Analog FIT Distribution Method
      6. 3.1.6 Operational Profile
    2. 3.2 Pin Level Tailoring Tab
    3. 3.3 Function and Diag Tailoring Tab
    4. 3.4 Diagnostic Coverage Tab
    5. 3.5 Customer Defined Diagnostics Tab
    6. 3.6 Totals - ISO26262 Tab
    7. 3.7 Details - ISO26262 Tab
    8. 3.8 Example Calculation of Metrics
      1. 3.8.1 Assumptions of Use for Calculation of Safety Metrics
      2. 3.8.2 Summary of ISO 26262 Safety Metrics at Device Level

3.1.1 Geographical Location

The relative neutron flux field sets the radiation exposure rates relative to a certain elevation in the world. The user may alter these assumptions to meet their specific use case. The higher the relative neutron flux, the larger the raw (base) transient FIT rate.