footprintpackages
This datasheet specifies the packages for the components, but not the associated footprints.
The package of interest for me is SU-48. The obvious search brings me to this outline, but still no footprint.
Where can I find footprint information for the SU-48 package?
I use Eagle and, despite its huge libraries, most of the time I prefer to create my own footprints since I can adjust them to suit my needs.
For example, I usually use a 0.25 grid and the 0603 capacitor as it is on the library doesn't allow a 0.25 mm trace to pass between pads with a 0.25 mm clearance without warnings so I redesigned the footprint so it generates no warnings.
Besides that, it is common not to find the components you need on the libraries or to make slight modifications to adjust them to your design preferences.
The SO8W (Wide) package dimensions are as follows:
For confirmation, the datasheet of the specific part would be of value.
For land pattern and pad dimensions, just use a SO8N package layout, and split it down the middle to fit the wide package.
For a comprehensive list of package dimensions, see this link.
Best Answer
Despite what Olin says, it's actually not unusual at all for datasheets to provide footprints. It's the first place I look. However, this part comes in standard TQFP and LFCPS packages, and either your PCB software can generate these with a wizard (Altium does) or you can look up the footprint online:
Microchip Packaging Specification document has some.
The key thing you want to search for is TQFP or LFCPS (depending on the package you choose).