General > General Technical Chat

SOP-4(ish)

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DavidAlfa:
Still this is one of these packages triggering all alarms before production, can't trust pictures or descriptions, check the ordering code in the datasheet to make sure that it's the good one!
Same as the ususal soic/wsoic screw-up!
If your layout allows it, it's best to combine both footprints so you can use any when the next epidemic comes! :-DD

nctnico:

--- Quote from: PlainName on March 15, 2024, 09:13:44 pm ---
--- Quote ---Is it really that hard to google "Optocoupler packages" ?
--- End quote ---

Did that, hence the confusion of which is actually SOP-4 - the wide one seemed to be 'real' SOP-4 but you say it's the other one  :-//

--- End quote ---
Always check the datasheet. There are many manufacturers who use the same name for an entirely different packages. Like QFN for example. These exist in 0.4mm, 0.5mm and 0.65mm pitches. And different case sizes as well despite having the same number of pins. I have stopped going by chip package names a long time ago.

thm_w:

--- Quote from: PlainName on March 15, 2024, 09:15:11 pm ---
--- Quote ---Better to always check and not assume anything, IMO.
--- End quote ---

Well, of course I would check the final choice, but knowing what to search for in order to make a choice that can be checked is part of the problem. Waste of time searching for the one I don't want :)

--- End quote ---

Sure, but that only works on sites which properly enter all of the data.
From your link LCSC has: SOP-4, SOP4-2.54mm, SOP4-2.8mm, etc. so you'll have to dig through to find what you want, assuming you want to check everything.

PlainName:

--- Quote ---If your layout allows it, it's best to combine both footprints so you can use any when the next epidemic comes!
--- End quote ---

Yes, I was thinking that might be a reasonable solution, though not so hot when space is at a premium.

PlainName:

--- Quote ---From your link LCSC has: SOP-4, SOP4-2.54mm, SOP4-2.8mm, etc.
--- End quote ---

Ding! Thank you - I've twigged now  :-+

I thought that SOP-4 was a specific package but instead it seems to be a parent style for particular formats. That is, there isn't a simple SOP-4 package and instead it is always qualified. Except for manufacturer's data because they assume the one they use is the real one.

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