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Step Model Pin One Dot Missing |
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rrix 
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Joined: 10 Jan 2018 Status: Offline Points: 34 |
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 Topic: Step Model Pin One Dot MissingPosted: 10 Jul 2023 at 11:59am |
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When creating a STEP model, I see a pin one dot for the demo component, but not for the part I'm creating. I'm using version 23.09.
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Tom H
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Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718 |
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Posted: 10 Jul 2023 at 12:08pm |
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This is an Inch Pitch SOIC and they don't have Polarity Dots.
They have a chamfered body along the side where Pin 1 is.  |
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cc_ds
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Joined: 23 Oct 2018 Status: Offline Points: 3 |
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Posted: 17 Jun 2024 at 2:33am |
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Is there a option to add a pin1 dot into the 3d model for SOIC?
I have this component here and it shows a pin1 dot. |
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Tom H
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Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718 |
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Posted: 17 Jun 2024 at 8:46am |
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The Chamfered Body along the Pin 1 side is for most SOIC's.
The Chamfered Body differentiates between Inch and Metric packages. Only SOIC's with Metric pin pitch have polarity dots on 3D STEP models. The plastic body on the TI SOIC in datasheet you listed has both a Chamfer and a Dot. That's a double polarity marker. |
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