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What got stuck to my shoe

colporteur

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I received a shipment of TCA9548A multiplexes in an anti-static bags. Slip in between the folds of one of the packages was this module. I suspect it is a long lost chip trying to find it way home. I've been unsuccessful in discovering what it is, so I can't give it purpose. Any suggestions?

The silver package to the left has the markings 1244 U401 001. The black components towards the top od the PCB has LB2K. There are no components or markings on the back of the board.

Anyone see this beast before?

The dimension of the board is 1cm square. It came with a five pin header not soldered.

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  • I got unwanted parts today too. I ordered two 555 chips from CPC, and got these instead.. ULN2804A Not as interesting as a sensor!

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    Interesting thing is that CPC don't offer ULN2804A.. looks like they somehow picked from a Farnell bin maybe.

    Kind of useless IC's.. I don't have a need for arays of darlingtons usually. Anyway, too low cost to be worth time to get the correct items sent. The 555 parts were a filler item in the order anyway.

  • in reply to shabaz

    "Interesting thing is that CPC don't offer ULN2804A."

    They are showing up as being stocked here:
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    The great SC08629 / SC08608 mix up of 2025  Slight smile

  • in reply to beacon_dave

    I think their search is broken. Searching for ULN2804A gets converted by the site into a search for 'darlington transistors', and it finds 86 of them, of which eight are categorized as ICs. Those eight are missing the UN2804A. Anyway, not going to raise this with the team, because it's just too irritating. This should be automated, they ought to have rules for alerts (and internal logs) to be generated when silly things like this happen, when the search results do not contain the item actually requested! 

  • in reply to shabaz

    The quick search finds it:

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    The search engine can be painful at times - I often know there is something in there but it just won't find it, unless you know the exact order code.

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