some chips are proprietary, like black-boxes, some manufacturers use part numbers that overlap other manufacturers components.
sometimes looking for a chip, you cant find the exact number, so you can truncate the last few digits, like anything after a dash, to find the chip family data.
That makes perfect sense.
None of the chips I scavenged have a dash or anything of that nature. So when I found the "family", for the example chip above, "PS224". Stumped as to where to go from there. I suspect I should just trial and error or don't use them at all in that case.
Google "PS224" and the datasheet is the first item to come up. Googling works with many recent components but not some very old ones.
I can only see 8 pins in that photo. How did you get 16?
I found the results for PS224, but nothing for the second line of text. Back at square one.
That pic is just something pretty to look at. I do have some unidentified 8 pins as well though.