BLE121LR DATA SHEET Wednesday, 02 December 2020 Version 1.8 Not Recommended for New Designs VERSION HISTORY Version Comment 1.1 First release Standard gain mode option for the receiver added. Figure 22 corrected. 1.2 Certification info updated. Footprint and PCB land pattern figures revised. Design check list added. Layout guide updated. Range chapter added. 1.3 Stencil thickness recommendation updated 1.4 Added section on package marking 1.5 Updated description of encryption modes 1.6 Added tape and reel information 1.7 Updated certification information RenamedBluetooth Smar toBluetooth Low Energ according to the 1.8 official Bluetooth SIG nomenclature Silicon Labs Not Recommended for New Designs