Hello,

I am trying to identify this IC (see attached image), the part number is clear enough to know the chip but I couldn't figure out which chip manufacturer from the logo on the IC!
The PN is AHCT244 which is an octal buffer/driver.

One more question, why there are some parts that are manufactured by multiple semiconductor manufacturers? and what are these ICs called?

Thank you,

 

This looks like the Nexperia logo rotated 90 degrees CCW:
https://www.nexperia.com/products/a...ic/buffers-inverters-drivers/74AHCT244PW.html

 

This looks like the Nexperia logo rotated 90 degrees CCW:
https://www.nexperia.com/products/a...ic/buffers-inverters-drivers/74AHCT244PW.html

Thank you, I don't know how I forget about Nexperia.
I was thinking NXP but they are the same I guess!

 

...

One more question, why there are some parts that are manufactured by multiple semiconductor manufacturers? and what are these ICs called?

Thank you,

The US defense and aerospace industries were primary drivers of the nascent semiconductor industry in the latter half of the 20th century. Their procurement rules specified that any parts used in their equipment have multiple vendors capable of meeting production demands so that they would not be dependent on a single source. Proprietary products were anathema to them. The generic name for them is "2nd source".