> Flip-flops hardened against metastability are available. Do you have a part number in mind?
The only data sheet that I remember for a part that looked interesting was actually 2 FFs inside one package. For something like that, you save the prop time of the output driver and the input receiver relative to a classic pair of FFs. That should be a significant improvement relative to the classic pair of FFs. Other than that, the parts I remember were nothing special. Maybe the designers actually understood metastability and did some testing and wrote a data sheet with promises. I don't remember the details. -------- There is no cure for metastability. You can only make the probability lower. There are two ways to make things better. One is to get faster logic and run it at the old clock rate. The other is to wait longer. If you wait long enough, you can make the probability low enough, as in a MTBF of greater than the age of the universe. Modern high speed logic has a (much) faster settling time which makes the window smaller, but then we run the whole system at a faster clock rate so the probability of events per second stays roughly the same. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
