The MKW31Z512VHT4R from NXP USA Inc. is a Kinetis KW31Z Radio Frequency transceiver and MCU Integrated Circuit supporting Bluetooth v4.2 at 2.4 GHz, in a 64-VFLGA package.
The MKW31Z512CAT4R from NXP USA Inc. is a Radio Frequency transceiver and MCU Integrated Circuit with Bluetooth v4.2 support, operating from 2.36 GHz to 2.48 GHz and supplied in a 75-UFBGA, WLCSP package.
The MKW31Z256VHT4 from Freescale Semiconductor is a Bluetooth v4.2 Radio Frequency transceiver and MCU Integrated Circuit operating at 2.4 GHz, in a 64-VFLGA package.
The MKW31Z512VHT4 from NXP USA Inc. is a Kinetis KW31Z Bluetooth Radio Frequency transceiver and MCU Integrated Circuit, supporting Bluetooth v4.2 at 2.4 GHz, in a 64-VFLGA package.