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I am sorting my shop and found a stick of ICs:

enter image description here

The markings on the top side are

3636

CWSA

'Microchip logo', 'another logo'

Is there a way to identify this chip?

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  • \$\begingroup\$ The identification text is usually on the other side? Is the other side blank? \$\endgroup\$
    – Syed
    Nov 9, 2021 at 14:03
  • \$\begingroup\$ If the markings are on the bottom, I'd suspect they are counterfiet and throw them away. Of the thousands, 10's of thousands or maybe more IC's I've seen, exactly zero were marked on the BOTTOM. \$\endgroup\$
    – Kyle B
    Nov 9, 2021 at 15:39
  • \$\begingroup\$ Question is corrected now. The view in the figure is the top side. On the bottom side are no markings \$\endgroup\$
    – v3xX
    Nov 9, 2021 at 18:47
  • \$\begingroup\$ Maybe a security chip of some kind. Perhaps you can do a digital search of your purchase orders. \$\endgroup\$ Nov 9, 2021 at 19:00
  • \$\begingroup\$ I did. the only chipset with this amount are CAP1298 mouser.at/datasheet/2/268/00001571B-1859501.pdf but the other ICs I have are marked with 'CAP1298' and the same MC logo \$\endgroup\$
    – v3xX
    Nov 9, 2021 at 19:27

1 Answer 1

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With a hint from the comments I was able to identify the ICs. I traced my orders and only a few chips with this amount, package, pins, design and manufacturer remain.

They are CAP1298 capacitive proximity sensors. On p. 60 are the markings of the different variations listed. Apparently these are production and traceability numbers.

I ordered a few shortly after they became accessible, therefore my existing stock may have different markings.

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