I bought a strip of 'LMV358's from China. Naturally, there was always a good probability that they'd be fake, given that they were like $0.08 each.
I hooked one up to a function generator and a scope, and to my surprise, they actually act like 'real' LMV358's.
Now, I'm quite sure they're fake for two reasons:
1. The 'TI' markings wipe right off
2. It performs better than the TI datasheet indicates. TI lists the common-mode input range as spanning up to about 0.6V below Vdd, and these guys happily go right up to the rail.
Other specs, like slew rate, output range, offset, etc - are all in the right ballpark or a bit better than 'typical' values. I know there are differences in LMV358's - e.g. ST and ONsemi datasheets claim that their products are rail-to-rail input and output (unlike TI). So, did I just get a 'rebadged' Chinese generic LMV358? Or do genuine TI parts actually work better than advertised?
Are there any other fakes that you've found that are actually kinda.... good?