SPRACS9A June   2020  – July 2025 TS3USB221A-Q1

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
  5. 3Failure Mode Distribution (FMD)
  6. 4Revision History

3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for TS3USB221A-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 resulting from misuse or overstress.

Table 3-1 Die Failure Modes and Distribution
Die Failure ModesFailure Mode Distribution (%)
I/O no output (Hi-Z)20
I/O channel stuck on10
I/O channel stuck off10
I/O functional out of specification voltage or timing60