how to determine package dimensions

[jweaver]

When choosing a component such as a capacitor in Multisim  a footprint is selected, but I cannot find out how to decode the dimensions.  Example:  CAPPR1000-2200X2500.   I tried looking this up on the web but cannot find it.  Is there a pdf file out there somewhere that explains this.  I assume this one means polarized radial lead but which is the pin spacing and height?  can I look this up easily without going to ultiboard?

[Mahmoud_W]

Hi,

In the Component Database of Multisim if you click on detail report, an information window with the of the model, symbol and footprint will pop-up.

You can check the different shapes of the footprint to use.

If you want to know the dimensions of the footprint just open Ultiboard and got to Tools>Database>Database Manager in the database manager click on Show dimensions and you will see the dimensions of the part (check attached screenshot).

Just a quick hint, if you choose a footprint inn Multisim that is not correct, once you transfer your design to Ultiboard just select the component and go to the tools menu and click on Replace Part and you will be able to select the right footprint with the available preview in component database.

Hope this helps,

Mahmoud W

National Instruments

[jweaver]

Thanks Mahmoud,   that helps but I also like to know  what these numbers mean when I'm searching for a footprint: CAPPR1000-2200X2500,  and not just for capacitors but resistors etc.  This does not seem to follow any standard, and as I said I tried quite a bit of searching on the web and found some things that were close.  Where can i find this information?  From ultiboard it seems that the 1000 means pin spacing in mm, but what about 2200 x 2500 ?  I assume diameter and height?  

for example:

http://landpatterns.ipc.org/IPC-7351BNamingConvention.pdf

very clear naming conventions.  Where is this for CAPPR1000-2200x2500 and also resistors etc.. ? 

Thank you very much for your assistance

[Mahmoud_W]

Hi again,

I double checked and landpatterns in Multisim follow the IPC-7351B naming convention.

Packages/footprints (what is seen from the component browser in Multisim) sometimes follow that but usually are the manufacturer package name, this is what have confused you. Specifically relating to that capacitor however, it follows the IPC-7351B standard . In this case it should be CAPPR + Body Length + Body Width X Height.

Hope this answers your question,

Mahmoud W

National Instruments