Replacement for Intel / Altera EPM570F256C5N

Hi, If you are moving from slower to faster speed grade device, then there will be no risk from timing perspective.

For faster to slower device, you should re-run the Timing Analysis only for the new device to check if you have sufficient margins and all constraints are met or not.

A way to do that is to create a Timing Netlists for different speed grades in Timing Analyzer tool and check the performance.

Regards