Need Help to identify an IC

Discussion in 'General Electronics Chat' started by haf2eez, May 17, 2014.

  1. haf2eez

    Thread Starter New Member

    May 17, 2014
    1
    0
    Does anyone knows this serial number of an IC WR630161 9550, which is a 16 pin when i went to buy UM 3481 shopkeeper gave me this . but when i tried this in um 3481 doorbell circuit its not functioning, kindly help.
     
  2. absf

    Senior Member

    Dec 29, 2010
    1,493
    372
    9550 is probably the date code year95 week50. I couldn't find the chip with google so I guess it is some cheap imitation from China.

    You can easily get UM3481 from eBay

    eBay

    or here

    ESCOL

    The datasheet of UM3481 is attached

    Allen
     
  3. enggricha

    Member

    May 17, 2014
    62
    1
    You could be looking at the first line of the IC numbering, while the actual part number could be on the second line. If u can share a picture of the IC, we can get to the part number.
     
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