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To know the MTBF or Failure-in-time rate (FIT), you may refer to the following solution:
You can find the FIT rate for Altera devices in the Reliability Report. Kindly be noted that the FIT rate for devices within the same family with the same process technology will be very similar and can be used for devices not explicitly listed in the Reliability Report.
Cyclone 10LP process technology= 60nm
Hope this help!