32L PLCC Dimension D2 Query

Using 2014.02 to create a Winbond 32L PLCC, datasheet here:

http://www.winbond.com/NR/rdonlyres/A0AC3708-50FF-4854-853A-92DC4CB01B37/0/W39L040A.pdf

The Surface Mount calculator has a D2 dimension but it's a bit unclear what this dimension is meant to be in the screen picture, other than it being a required entry.

I wondered if it was meant to be the dimension GE that's shown on the Winbond datasheet?

If so, there's no corrisponding E2 in the opposite plane to be equivilent to GD in Library Expert.

Thanks Tom, that's what I'd thought but on screen it's a bit difficult to make out, even on a 24 inch monitor!

This particular PLCC though has a different number of pins along one side then the other, so I would expect to have an E2 as well as a D2 dimension to be entered.

In this case D2 is GE on the datasheet, being 10.41 mm nominal.

What's missing in Library Expert is an E2 to match up with GD on the datasheet, being 12.95 nominal, or are you taking care of that internally in the software?

I guess you could work out E2 by knowing D2, D1 and D, and then knowing E and E1, and workout what E2 could be?

yes, but this dim didn't look obvious to me at first so I was checking particulary because of the absence of an "E2" dimension.