Mechanical specifications QFN48 6 x 6 mm packagehttps://devzone.nordicsemi.com/f/nordic-q-a/42010/mechanical-specifications-qfn48-6-x-6-mm-packageHi, Could someone please help to advice what is the tolerance of dimension D,E (min/max)? nRF52810_PS_v1.2.pdf, page 470 Thank you Dustinen-USTelligent Community 13Wed, 02 Jan 2019 13:54:01 GMTRE: Mechanical specifications QFN48 6 x 6 mm packagehttps://devzone.nordicsemi.com/thread/163460?ContentTypeID=1Wed, 02 Jan 2019 13:54:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:51cc987e-a582-4830-ad49-84d372975f92ketiljo<p>The D and E are BSC (basic spacing between centers) in the POD&nbsp;(packet outline drawing).&nbsp;The BSC&nbsp;dimension is a numerical value which defines the theoretical exact size of the device. It has no tolerance implied until it is tied to a feature. Relating to D and E, specifying a profile tolerance of 0.10 (or the aaa per jedec) for the edge surface of the package. This means in every point along each of the 4 sides must be within 0.05 mm of half of the body dimension as measured from the center line of the package.</p> <p>Applying this somewhat simplified, it means that D and E are both given a tolerance of +/ 0.10mm.</p><div style="clear:both;"></div>