Prototyping some bucket brigade stuff here and was surprised to come across a batch of BBD chips from Coolaudio (V3205) that turned out to be reversed inside the package 
Took a while to figure out what was going on hahaā¦ Iāve been using this specific part a many times over the years and never seen anything like that. Seems to be from two different batch numbers too
Wait, the die inside is flipped? Do they call this out in the datasheet at all? I canāt imagine having to look up batch numbers on the assembly line to put parts together correctly!
Yup exactly! Turning them 180 degrees in the socket did the trickā¦ Drove me nuts because i was checking everything a hundred times, and tried 4 different chips, so thought all of the chips were either faulty or fake, which didnt seem likely given the niche market haha.
Found this thread where the OP did the same discovery, turns out it was the same batch number:
Donāt trust the datasheet, also donāt trust the package
Incorrect labeling, maybe. But an incorrect pin#1 notch? I canāt imagine any manufacturer shipping such a chip (although I read in the linked blog that it really happened). That just screams āfakeā chip to me. Iād be very wary of a manufacturer who lets unidentified reversed packages into the wild.
Yeah, notch and all is wrong, so not just the labelingā¦
