https://devzone.nordicsemi.com/f/nordic-q-a/40153/understanding-nrf52832-package-markingHi, I&#39;m trying to relate the package marking to the IC revision or more specifically to the relevant errata sheet. The documentation mentions the fields &lt;PP&gt;&lt;VV&gt;&lt;H&gt;&lt;P&gt; fields in the 2nd line of the marking ( here ). Total of 6 letters So QFAAB0en-USTelligent Community 13Mon, 05 Nov 2018 07:32:53 GMThttps://devzone.nordicsemi.com/thread/155859?ContentTypeID=1Mon, 05 Nov 2018 07:32:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7e308db4-41e6-4e62-96c0-e53aa3c1dcbdAndreas<p>Hi,</p> <p>&nbsp;</p> <ol> <li>See <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/compatibility_matrix/ic_revision_overview.html?cp=2_1_3_0">this section of the compatibility matrix</a>. &#39;B00&#39; (last 0 not marked on the QFN packet) means production revision 1, &#39;E00&#39; means production revision 2.</li> <li>Production revision 2 is latest, you can find the list of erratas for all revisions <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/errata.html?cp=2_1_1">here</a>.</li> <li>Engineering revision devices have build codes on the form of &#39;AA0, , &#39;BA0&#39;, &#39;BB0&#39;, whereas production revision devices have build codes on the form of &#39;B00&#39;, &#39;E00&#39;. I.e. the second symbol gives it away, Letter =&gt; engineering revision, number =&gt; production revision. Note as the last 0 is not printed on the chip packet itself, the reading will be either QFAAAA, QFAABB, QFAAB0, QFAAE0. For nRF52832 there should not be any engineering revision devices around anymore, unless you have any DKs (version lower than v1.0.0) or samples acquired before early 2016.</li> </ol> <p>&nbsp;</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>