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wasted ability to choose different footprints?

Sparkylabs

The ability to assign multiple footprints to a part is nice but it immediately creates a conflict for BOM's as supplier links or other ordering information entered into the parts "parameters" become useless as for example I could create an opamp part and assign both DIP8 and SOIC8 footprints to it but there is as far as I know, no way to assign different parameters based on footprints. Is this correct or is there some functionality I don't know about?

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  • Well if that is the case the only way to keep them separate is to have separate symbols which is a little silly as now the the schematic symbol library is no longer driven by part functionality but by both part functionality and footprint. I rather liked the idea of being able to place a part and then alter the footprint if required, but it makes no sense.

  • in reply to Sparkylabs

    On the other hand, this is useful if I want to use multiple footprints for the same package.  For example, if I use an EIA0603 resistor and I want to choose from the least, most or nominal solder options then I can just have the various footprints available. Then I can choose the proper footprint depending on whether the board is reflow or wave or hand soldered. I would argue that the SOIC, MSOP, TSSOP and CSP versions of a chip are different and warrant a different schematic library symbol.  Sometimes there are even different numbers of pins.

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  • in reply to Sparkylabs

    On the other hand, this is useful if I want to use multiple footprints for the same package.  For example, if I use an EIA0603 resistor and I want to choose from the least, most or nominal solder options then I can just have the various footprints available. Then I can choose the proper footprint depending on whether the board is reflow or wave or hand soldered. I would argue that the SOIC, MSOP, TSSOP and CSP versions of a chip are different and warrant a different schematic library symbol.  Sometimes there are even different numbers of pins.

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