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SOIC Missing Polarity Marker |
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phil.holden 
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Joined: 14 Aug 2020 Status: Offline Points: 59 |
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 Topic: SOIC Missing Polarity MarkerPosted: 07 Sep 2021 at 11:30am |
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Every STEP I output in the SOIC family has the pin 1 marker missing from the model.
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Tom H
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Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5716 |
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Posted: 07 Sep 2021 at 11:43am |
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The 1.27 mm (50 mil) pin pitch SOIC has a Body Chamfer all along the Pin 1 Side.
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phil.holden
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Posted: 07 Sep 2021 at 11:45am |
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Thanks Tom. I hadn't noticed this.
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Tom H
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Posted: 07 Sep 2021 at 11:47am |
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It's one of the ways to differentiate between mil pitch and metric pitch SO's.
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phil.holden
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Posted: 07 Sep 2021 at 11:48am |
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Good point. Something I shall pass on to my colleagues.
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