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SN74AHC257-Q1: Symbol, footprint for WQFN

Part Number: SN74AHC257-Q1

Tool/software:

Hello,

I would like to know why there is not a single library for the WQFN package family.  I have try searching for various parts with the SN74xxx257 family and can't find a single library for support of the WQFN package.  When I try to go to your CAD for these parts, Ultralibrarion request just gets stuck.  Of course I would like a 3D model along with it.