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PCA9626 LQFP48 footprint dimension question

Question asked by Trevor Hermosillo on Aug 22, 2016
Latest reply on Aug 24, 2016 by Tomas Vaverka

In section 19 (page 44) of the PCA9626 data sheet (http://www.nxp.com/documents/data_sheet/PCA9626.pdf) the footprint drawing recommends dimension D1 to be 0.28mm, and D2 to be 0.5mm (x 8). The drawing would suggest that all 8 outside pads are 0.5mm D2. However, pads this large would not allow adequate solder mask spacing between land. Is there a reason these pads are dimensioned so large? Can the larger pads be ignored and assume D1 for all?

 

Thanks!

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