Answers - - The metric pitch SOP has a polarity dot and the imperial pitch SOIC has a pin 1 side body chamfer.
- The Library Expert follows the IPC-7351 standard component packages. The PLCC2 LED is not in the standard yet. However, you can use any 2-pin package like "CHIP" and enter the body dimensions and then select the "Footprint" tab and enter the mfr. recommended pattern dimensions. In the CHIP component family you can also select LED CHIP. You can also use the "Footprint Designer" (FP Designer) to create any mfr. recommended footprint.
- If you don't like the proven IPC-7351 auto-generated footprint you can always use the "Footprint" tab for every component family or use FP designer to create pad stacks and place then where you want them. We do promote the use of the mfr. recommended pattern for all component packages that are not in the IPC-7351 standard.
The Library Expert is very versatile, you just need to build some parts using the various options. In the V2014.01 release (coming out later today) there is also a PADS Layout p/d file translator. You may not think this is important, but later this week "Parts on Demand" (POD) website will open and it will have unique complex package footprints available for download in PADS p/d ASCII format and there will be a filter that the data passes through to allow you to change outline widths and on/off switch for all outlines. POD will also contain millions of mfr. part numbers available in FPX format to save you the trouble of entering in all the component dimensions and physical and logical attributes in the FPX file. PCB Libraries, Inc. is investing most of our resources into library content to eradicate library construction globally for all CAD tools. Customers will be able to "Search > Find > Download > Import" FPX files into Library Expert and if you can't find the mfr. part number you're looking for you can request it and either the electronic community will upload it to POD or PCBL will upload it or you can create it and upload it to share with everyone else. Every Footprint in the world only needs to be created once by someone and shared with everyone in a neutral software format that can be outputted to every CAD tool in the industry. There are 500,000 different component packages and 50 million mfr. part numbers. Eventually all of them will be on POD.
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