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Correct SOT-143 #2415

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Correct SOT-143 #2415

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perigoso
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@perigoso perigoso commented Aug 25, 2020 •
edited by cpresser
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Corrected footprint dimensions for standard SMD instead of wave soldering.

Related to #2381 .

Datasheets for this package:

The 3D model seems to not be correct according to the datasheets.

Before:
image
image

After:
image
image

The same applies to the _Reversed and _Reversed_Handsolder footprints

@myfreescalewebpage myfreescalewebpage added Bug Fix footprint existing in the library Pending reviewer A pull request waiting for a reviewer labels Aug 25, 2020
@cpresser cpresser linked an issue Sep 17, 2020 that may be closed by this pull request
SOT-143 footprint #2381
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I assumed you used the diodes datasheet? I checked against that one.

  • Pad numbering and Position is good.
  • F.Fab is good
  • Courtyard is good
  • Please add a datasheet link into the description
  • Silkscreen should move outwards a little. It should not overlap the F.Fab line. Like so
    image
  • The reverse part should be rotated so that pin1 is in the upper-left quadrant
  • I am unsure how to check the handsoldering parts. Is there any rule you applied to elongate the pads?

@cpresser cpresser self-assigned this Sep 17, 2020
@cpresser cpresser removed the Pending reviewer A pull request waiting for a reviewer label Sep 17, 2020
@perigoso
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I assumed you used the diodes datasheet? I checked against that one.

I don't remember which datasheet i ended up using as a guideline, but i believe i checked them all against each other and they were the same or very close to the same dimensions (if I'm remembering correctly) so it shouldn't matter too much.

Please add a datasheet link into the description

done. I added NXP's references because they had a both the normal SOT-143 and the reverse pinning version and so it is more consistent.

Silkscreen should move outwards a little. It should not overlap the F.Fab line. Like so

done.
image

The reverse part should be rotated so that pin1 is in the upper-left quadrant

done.
image

I am unsure how to check the handsoldering parts. Is there any rule you applied to elongate the pads?

I looked for guidelines, but since i didn't find any i just did what felt right to me, the pins are slightly shorter than the original hand-solder versions

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SOT-143 footprint
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@perigoso @cpresser @myfreescalewebpage