How to know that MCU is genuine

[DAhn]

I bought 960 MCU very expensive.

but many barcode and number has been deleted.

I just wonder that this mcu is genuine or not

 

 

 

[waclawek.jan]

> I just wonder that this mcu is genuine or not

It's almost impossible to tell whether an IC is genuine - and its entirely impossible just by looking at pictures. Counterfeits are almost perfect these days.

And, particularly for 'F103, there are too many clones out there. Removing information certainly rises suspicion. And the marking appears to be slightly misaligned to the left. But none of these is a proof, not even towards "not genuine".

JW

[Tesla DeLorean]

Markings look consistent. Often trace would be removed if the original purchaser doesn't want blow-back due to contract, export licencing or non-resale agreements. This can interfere with pricing, and availability/delivery in the future.

You'd likely need to engage with a company who can xray and decap to get a provenance / authentic opinion / report.

Alternative is to build a few units with randomly selected parts, and test/evaluate to your own requirements / specifications.

[Uwe Bonnes]

Fake CPUs are either non-functional or are remarked clone-CPUs. Clone CPUs have some indication, like the GD32F103 has a more recent Cortex-M3 core.