2.4 GHz Radio Transceiver, 8051 MCU, 16KB or 32KB Flash memory and full-speed USB interface 36-VQFN -50 to 150
Texas Instruments
Texas Instruments - CC2511F32RSP
$4.13 - * $8.56
Texas Instruments - CC2511F32RSPR
$3.51 - $87.78
Texas Instruments - CC2511F16RSPR
$3.55 - $5.07
Texas Instruments - CC2511F16 SP
Texas Instruments - CC2511F32 SP
Texas Instruments - CC2511F32 SPG3