SWRA741 February 2022 CC2651P3 , CC2651R3
The CC2651R3 is a downscaled version of CC26x2R/CC2652R7 with 32 kB of RAM and 352 kB of flash and a cortex M4. The two devices are pin to pin compatible and a PCB design made for the CC26x2R can be reused for the CC2651R3. The only BOM update required is updating the wireless MCU used.