Before introducing the RSL15, this presentation will start by mentioning the RSL10 family of BLE 5.0 system on chip (SoC). Moving left to right, the RSL10 is packaged in a 6 x 6 mm QFN, followed by the smaller form-factor WLCSP RSL10 measuring 2.3 x 2.3 mm. Next is the RSL10 system in package (SiP), which is an all-in-one solution containing the antenna, power management, filtering, and passive components, fully certified to Bluetooth® and regional standards. Finally, the automotive qualified version of the RSL10 is available in a wettable flank-plated QFN 7 x 7 mm package. In November 2021, onsemi released the RSL15 in a 5 x 5 mm QFN, their first BLE 5.2 device. Subsequently, onsemi will introduce the WLCSP, module, and automotive versions of the RSL15.