https://devzone.nordicsemi.com/f/nordic-q-a/39310/nrf51822-qfabr7-vs-nrf51822-qfab-r-v3What is different between R7 and V3 ? Data sheet say rev 3.3 - but that is just the rev of the data sheet Suppliers have both R7 and R-V3 inventory Does it make any functional difference ? Thanks Jack Gratteau Perceptimed Incen-USTelligent Community 13Wed, 10 Oct 2018 08:28:54 GMThttps://devzone.nordicsemi.com/thread/152302?ContentTypeID=1Wed, 10 Oct 2018 08:28:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:49250cbc-2ce9-4da4-9ccd-56faad1a761bbjorn-spockeli<p>Hi Jack,&nbsp;</p> <p>we do not use R or R7 in our IC markings, see&nbsp;&nbsp;<a title="nRF51822 IC revision overview" href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf51/dita/nrf51/compatibility_matrix/nRF51822_ic_revision_overview.html?cp=3_0_1">nRF51822 IC revision overview</a>. I believe that the R stands for Reel, i.e. that the components are delivered in a reel. Any number after the R indicates the diameter,e.g. R7 is a 7inch reel.&nbsp;</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>