To good to be true.
Try before label as fake...
Many reasons to find chips undervalued, like excess inventory, end of production, company bankruptcy and many other ones.
Fake or not fake is not the matter the matter is work or not.
By experience all so called fakes works fine, and at least 80% do exactly as the datasheet describes, You are fool enough to pay 20 times more for something to be real not fake etc etc it's up to you.
Ei incumbit probatio qui dicit, non qui negat even for ic's this can be true
What on earth does 'works fine' mean?? Sure, the fake OPA627's that I bought 'worked', but they did not meet the specs for an OPA627, so were no use in any critical application that required the OPA627 specs, so I threw them in the rubbish bin where they belong.
If all you want is an op amp that 'works', then you are much better off just to buy a cheaper op amp in the first place.
If your demanding application requires an expensive, high-performance op amp, then fakes are also of no use.
Summary, fakes are not of any use to anyone.
What exactly is a 'fake' IC? I always assumed that it was a re-badged product, and done as a 'backyard' industry.
One cannot literally make an IC, and especially a high-performace state-of-art IC, in a backyard, or even in a small tinpot factory. Is there even such a thing as a 'fake' IC made in some no-name, large factory in China or similar? If any company and factory has the engineers and expertise to actually make IC's, then why would they need or want to make 'fake' ones anyway?
I tend to think that fake ICs are simply backyard rebadged ICs. Does anyone have evidence of fake ICs being manufactured, rather than re-badged?