SimpleLink 32-bit Arm Cortex-M4 single-protocol 2.4-GHz wireless MCU with 352-kB flash 48-VQFN -40 to 105
Texas Instruments
Texas Instruments - XCC2651R31T0RGZ
$4.00
Texas Instruments - CC2651R31T0RKPR
$3.88 - $5.50