SFFS785 January   2024 TXU0304-Q1

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 TSSOP-14 Package
    2. 2.2 VQFN-14 Package
    3. 2.3 TSSOP-14 and VQFN-14 Package
  5. 3Failure Mode Distribution (FMD)
  6. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 TSSOP-14 and VQFN-14 Packages

3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for TXU0304-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 ModesFailure Mode Distribution (%)
Die Failure ModesFailure Mode Distribution (%)
Driver HIZ no output 23%
Functional fail (voltage, timing, out of specification) 26%
Driver stuck at fault high 16%
Driver stuck at fault low 15%
Driver stuck at undetermined state20%