4 ms·

> idk, I've never had problems due to naming schemes. Concrete example, lets say I need 74123 in my project. If things were sane, I could just type in "74123"

by zokier 2y ago

> idk, I've never had problems due to naming schemes. Concrete example, lets say I need 74123 in my project. If things were sane, I could just type in "74123" in Digikey search field and see what my options are. But you can't because this middlefix logic family thing. And searching for just "123" is completely useless. Let's continue and say we go with the most jellybean 74HC family. Digging bit deeper I discover that in addition to the 74HC123 I was looking for, there is also 74HC4538, which has the same parametrics and same description. Yaay. And just visually eyeballing the part numbers is pain because all the random prefix/middlefix/suffix characters that might or might not be meaningful. I don't think finding basic jelly-bean logic parts should be this complicated. I can deal with analyzing the parameters etc, that is actually intrinsic complexity. But this part number stuff feels like just unnecessary bullshit getting in the way for discovering alternatives. I suppose big players will use preferred manufacturers and predefined logic families, so this won't be a problem. And 74 series is not all that relevant these days anyways. But still some standardization would have been nice.

bogantech 2y ago
You should know which logic family you need before you even get searching - voltage levels and timing should be known beforehand, which will dictate exactly which families are suitable
- zokier 2y ago
  > voltage levels and timing should be known beforehand, which will dictate exactly which families are suitable TI alone has 13+ logic families for 3V3 for example, and all of them are faster than HC family (and thus usable for lot of applications). Nexperia has similar count, some of them are same-ish as TI, some of them are distinct. And other manufacturers have their own stuff. So that doesn't really cut down the options much. Look at the table on page 7 of TIs "Logic Guide" for example https://www.ti.com/lit/SDYU001 https://www.ti.com/lit/SDYU001 or Nexperias "Logic Application Handbook" pages 293 onwards https://assets.nexperia.com/documents/brochure/Nexperia_LOGIC_Handbook_201029.pdf https://assets.nexperia.com/documents/brochure/Nexperia_LOGI... Sure, if you are doing very fancy stuff, then you can boil all this down to some one specific family. But especially with 74 series these days when how often that is actually the case? And how often you just want some jellybean part that is easily available? And with part availability being what it is, I'd want to easily substitute parts from other logic families.

by zokier 2y ago

bogantech 2y ago

You should know which logic family you need before you even get searching - voltage levels and timing should be known beforehand, which will dictate exactly which families are suitable

zokier 2y ago
> voltage levels and timing should be known beforehand, which will dictate exactly which families are suitable TI alone has 13+ logic families for 3V3 for example, and all of them are faster than HC family (and thus usable for lot of applications). Nexperia has similar count, some of them are same-ish as TI, some of them are distinct. And other manufacturers have their own stuff. So that doesn't really cut down the options much. Look at the table on page 7 of TIs "Logic Guide" for example https://www.ti.com/lit/SDYU001 https://www.ti.com/lit/SDYU001 or Nexperias "Logic Application Handbook" pages 293 onwards https://assets.nexperia.com/documents/brochure/Nexperia_LOGIC_Handbook_201029.pdf https://assets.nexperia.com/documents/brochure/Nexperia_LOGI... Sure, if you are doing very fancy stuff, then you can boil all this down to some one specific family. But especially with 74 series these days when how often that is actually the case? And how often you just want some jellybean part that is easily available? And with part availability being what it is, I'd want to easily substitute parts from other logic families.