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C6748 Lifespan

Jase3640
Expert 5565 points

Other Parts Discussed in Thread: TMS320C6748

Team,

I am looking for clarification on the expected device lifespan of  the TMS320C6748. The documentation (SPRS590B) p. 81 provides a note on recommended Power-On Hours which specifies Power-On-Hours (POH) to be of value 100 000h (~11 years).

The expected POH for their product device15+ years continuous usage.

1.) Are we interpreting the POH calculation correctly?

2.) If yes, do TI plan to release any versions with longer POH expectancy? What should be looking for?

3.) Does clock speed affect POH? i.e. does a 200MHz device have longer expectancy than a 300MHz or 450MHz device?

Many thanks

Jase

  • 0
    TI__Guru 62975 points

    Jase said:
    1.) Are we interpreting the POH calculation correctly?

    Yes, but my understanding is that this is where the reliability bathtub curve starts to turn.  It does not mean that devices will definitely break after 100k hours.

    Jase said:
    2.) If yes, do TI plan to release any versions with longer POH expectancy? What should be looking for?

    No plans at the moment.  100k is a typical TI benchmark for DSPs.

    Jase said:
    3.) Does clock speed affect POH? i.e. does a 200MHz device have longer expectancy than a 300MHz or 450MHz device?

    It would be reasonable to expect that POH will improve with lower frequency, voltage, and temperature (above 0), however I do not have the derating information for frequency.  Looking at the table in the datasheet, it's clear that for this device, the higher operating temperature has a greater impact on POH than frequency or voltage.