I have a question regarding the Chip Guide numbers (ex: cg99999) that are assigned to chips. Are these numbers assigned sequentially?

The reason why I ask is this. If assigned sequentially, you could determine the year of issue of many chips based on the number. OK, some chips might be issued in November or December and not get assigned until January or later (and even after other chips that did not come out until January). Further, some chips might not be discovered immediately and the number is no where close to when it was issued. But in many cases it seems this logic would work.

So... just how are these numbers assigned?

Have a great day...Jim