Hello Mengzhe,
Thank you for your reply.
In IBIS, Temperature keyword is there to indicate what temperature was used when the data was extracted from spice simulation or lab measurement.
It is up to the model maker to select correct number for it.
The meaning of the IBIS temperature is simply that the model's data was generated at these temperatures(typ/min/max).
So, my concern is regarding that temperature range it should not be same for both CMOS and TTL models.
In my opinion Temperature range should be updated in IBIS file for TTL models.
Thank you,
Best regards,
shweta chendake