Need Help to identify an IC

Thread Starter

haf2eez

Joined May 17, 2014
1
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.
 

absf

Joined Dec 29, 2010
1,968
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
 

Attachments

enggricha

Joined May 17, 2014
89
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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