Help identifying chip marked 311 / EZ619

[facoang]

hello, I don't reconiaze the PN number of attached picture

[TDK]

311

EZ619

 

Looks like the magic smoke left. I can't find anything about it. Maybe it's a custom part for a manufacturer. What is this from?

[AScha.3]

Its an LM311 , by ST:

LM311D/DT SO-8 Tube or Tape & reel marking : 311

 

https://cdn-reichelt.de/documents/datenblatt/A200/CD0000107.pdf