SFFS302 October   2021 SN74LVC1G3157-Q1

 

  1.   Trademarks
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 DBV Package
    2. 2.2 DCK Package
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 SN74LVC1G3157-Q1 DBV and DCK Package

3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for SN74LVC1G3157-Q1 in Table 3-1 comes from the combination of common failure modes listed in standards such as IEC 61508 and ISO 26262, the ratio of sub-circuit function size and complexity and from best engineering judgment.

The failure modes listed in this section reflect random failure events and do not include failures due to misuse or overstress.

Table 3-1 Die Failure Modes and Distribution
Die Failure Modes Failure Mode Distribution (%)
NO or NC no output (Hi-Z) 20%
NO or NC channel stuck on 10%
NO or NC channel stuck off 10%
NO or NC functional out of specification voltage or timing 60%