SFFS816 March   2024 TMUX4051-Q1 , TMUX4052-Q1

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 TSSOP Package
    2. 2.2 SOT-23-THIN Package
    3. 2.3 WQFN Package
  5. 3Failure Mode Distribution (FMD)
  6. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 TMUX4051-Q1: TSSOP and SOT-23-THIN Packages
    2. 4.2 TMUX4051-Q1: WQFN Package
    3. 4.3 TMUX4052-Q1: TSSOP and SOT-23-THIN Packages
    4. 4.4 TMUX4052-Q1: WQFN Package

2.3 WQFN Package

This section provides functional safety failure in time (FIT) rates for the WQFN package of the TMUX405x-Q1 based on two different industry-wide used reliability standards:

  • Table 2-5 provides FIT rates based on IEC TR 62380 / ISO 26262 part 11
  • Table 2-6 provides FIT rates based on the Siemens Norm SN 29500-2
Table 2-5 Component Failure Rates per IEC TR 62380 / ISO 26262 Part 11
FIT IEC TR 62380 / ISO 26262FIT (Failures Per 109 Hours)
Total component FIT rate 10
Die FIT rate5
Package FIT rate5

The failure rate and mission profile information in Table 2-5 comes from the reliability data handbook IEC TR 62380 / ISO 26262 part 11:

  • Mission profile: motor control from table 11
  • Power dissipation: 130 mW
  • Climate type: world-wide table 8
  • Package factor (lambda 3): table 17b
  • Substrate material: FR4
  • EOS FIT rate assumed: 0 FIT
Table 2-6 Component Failure Rates per Siemens Norm SN 29500-2
TableCategoryReference FIT RateReference Virtual TJ
5 BICMOS ASICs Analog and Mixed =< 50V supply 20 FIT 55°C

The reference FIT rate and reference virtual TJ (junction temperature) in Table 2-6 come from the Siemens Norm SN 29500-2 tables 1 through 5. Failure rates under operating conditions are calculated from the reference failure rate and virtual junction temperature using conversion information in SN 29500-2 section 4.