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SLCA003 February 2023 LM2901-Q1 , LM2901AV-Q1 , LM2901B-Q1 , LM2901V-Q1

1 LM2901-Q1, LM2901B-Q1, LM2901V-Q1, LM2901AV-Q1 Functional Safety FIT Rate, FMD and Pin FMA

1.2 Functional Safety Failure In Time (FIT) Rates

This section provides Functional Safety Failure In Time (FIT) rates for LM2901-Q1, LM2901B-Q1, LM2901V-Q1, LM2901AV-Q1 based on two different industry-wide used reliability standards:

Table 1-1 provides FIT rates based on IEC TR 62380 / ISO 26262 part 11
Table 1-2 provides FIT rates based on the Siemens Norm SN 29500-2

Table 1-1 Component Failure Rates per IEC TR 62380 / ISO 26262 Part 11

FIT IEC TR 62380 / ISO 26262	FIT (Failures Per 10⁹ Hours)
Package	TSSOP-14	SOIC-14
Total Component FIT Rate	10	16
Die FIT Rate	2	2
Package FIT Rate	8	14

The failure rate and mission profile information in Table 1-1 comes from the Reliability data handbook IEC TR 62380 / ISO 26262 part 11:

Mission Profile: Motor Control from Table 11
Power dissipation12 mW
Climate type: World-wide Table 8
Package factor (lambda 3): Table 17b
Substrate Material: FR4
EOS FIT rate assumed: 0 FIT

Table 1-2 Component Failure Rates per Siemens Norm SN 29500-2

Table	Category	Reference FIT Rate	Reference Virtual T_J
4	CMOS, BICMOS Digital, analog / mixed	6 FIT	55°C

The Reference FIT Rate and Reference Virtual T_J (junction temperature) in Table 1-2 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.