Electronics > Projects, Designs, and Technical Stuff
Possibly wrong marking on a chip from Ali?
thm_w:
Luckily you didn't get this one, apparently an optocoupler: https://www.aliexpress.com/item/4000118105223.html
There is one more source here, with different silkscreen: https://www.aliexpress.com/item/4000358826445.html
You can get for sure genuine ones for $1.10 each, but they are salvaged. So, I don't expect prices for new chips to be much less than that.
What are you using the chip for?
EEEnthusiast:
I know from first experience on some of the production facility in china for ICs. For e.g. if a semicon fab is making an IC , say for Microchip 93LC46B. If they figure out that the parts are selling in large volumes, they would start an alternate production unit for this. Those units would NOT be delivered to microchip, but to the local market for assembly. When they leave the semicon fab, these ICs would be un-marked, in order to protect IP issues and other legal clauses. Once in the local market, these would be screen printed or laser etched with the part number and Microchip logo. It then ends up in the assembly units when these parts are requested by some one who is assembling a board. Now in this case Microchip does not make any money as the product never comes from Microchip. But the end user does not know it because the parts look and function the same as original.
The only problem is when someone in the local market makes a mistake and prints the wrong part number on the blank ICs which came out of the fab. That's what you have got now.
Miti:
--- Quote from: thm_w on February 12, 2020, 01:55:53 am ---What are you using the chip for?
--- End quote ---
I’m working on a tracking generator for my spectrum analyzer. This was supposed to divide the 300MHz calibration output for the ADF4351 30 MHz reference frequency. This way I don’t need to tap into the 10MHz reference of the SA.
Anyway, apparently they fully refunded the amount. I’ll have to check my card balance.
magic:
--- Quote from: EEEnthusiast on February 12, 2020, 03:02:52 am ---The only problem is when someone in the local market makes a mistake and prints the wrong part number on the blank ICs which came out of the fab. That's what you have got now.
--- End quote ---
I doubt that mistakes are the only reason ;)
gbaddeley:
--- Quote from: EEEnthusiast on February 12, 2020, 03:02:52 am ---I know from first experience on some of the production facility in china for ICs. ... Those units would NOT be delivered to microchip, but to the local market for assembly. When they leave the semicon fab, these ICs would be un-marked, in order to protect IP issues and other legal clauses. Once in the local market, these would be screen printed or laser etched with the part number and Microchip logo. It then ends up in the assembly units when these parts are requested by some one who is assembling a board. Now in this case Microchip does not make any money as the product never comes from Microchip. ...
--- End quote ---
"protect IP issues and other legal clauses" What do you mean by this statement? It looks like IP is being stolen from Microchip and remarketed with non-genuine labelling.
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