Component with different footprints

[JJalling]

Hi,

I'm trying to add a component (LTC3564) to my library. The component is available in two different packages - one with 5 pins used and one with 7 pins used. How do I create component in my library? Should I create two different schematic symbols - one for each package/footprint?

Thanks for any tips!

/Jonas

[free_electron]

LTC3564-packacge1
LTC3564-package2

thats how i solve it

for exa,ple

LTC3564-SOT23
LTC3564-MSOP8

[David_AVD]

If the footprints have the same pinout, I just add multiple footprints to the schematic component.  If they are different, the only way I know of is to create multiple schematic components.

[gxti]

It is possible to map the pins differently for each footprint, but I only do it for generic parts like transistors or voltage regulators. It's least confusing to use letters to label the pins (D, G, S for a MOSFET) and then use the Pin Map to assign it to numbered pins for each footprint. You can find the Pin Map button in the dialog where you select the footprint, after clicking "Edit" in the schematic library or properties of a placed symbol. But then you have cases like nets that are on more than one pin (SO-8 MOSFETS) and you end up needing a separate symbol anyway so you can have 3 pins on top of each other so they all get electrically connected.

For ICs I just use separate symbols always, and use the manufacturer part code to name the symbol so it matches up with the BOM.

To answer your question more literally, even if the pinning were the same I would only put the one footprint I'm using on the symbol because any "extra" work I do is work that I'm not going to bother checking, and then 6 months from now I'll rely on it and get screwed because I chose the wrong footprint.

[mkissin]

Definately go with two different schematic components.

It's much simpler for the BOM if you consider this as two entirely seperate components, which happen to perform the same function, than as one component with two different packages and pinouts. In this case, your two components are the LTC3564ES5 (SOT23) and the LTC3564EDCB (DFN6). You get that from the ordering information section of the datasheet.

Your supplier links will thank you as well.