https://devzone.nordicsemi.com/f/nordic-q-a/5853/hardware-design-helpI am working on a project on wireless interface between phone and SIM card. I want to use chip nRF51822-CEAA to run SIM card simulation at phone side (include wireless communication). The restriction is the final product physical size, for example, foren-USTelligent Community 13Thu, 05 Mar 2015 08:22:09 GMThttps://devzone.nordicsemi.com/thread/20430?ContentTypeID=1Thu, 05 Mar 2015 08:22:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7c0dc62c-66dc-4bea-a5bc-257372632093Asbj&#248;rn<p>The smallest version of the nRF51822 is 3.5x3.33x0.55mm. You need some additional external components like crystal and a few passives, but it should be possible to get it all within the space you specify. The challenge will be to ensure good radio performance. Nordic can assist you with schematic and design reviews for your specific application. <a href="https://www.nordicsemi.com/eng/Support-Community/Contact-Support-Team">Normally this is done through the Nordic support system on the website</a> as the design is yours and not necessarily something you want to share on this open community.</p><div style="clear:both;"></div>