GR >> MK21FX512VMC12 
123646
MK21FX512VMC12
FREESCALE
Quantity 18650
Packaging BGA
Description original&Quality new original
472151
MK21FX512VMC12
NXP USA Inc.
Quantity 9000
Packaging IC MCU 32BIT 512KB FLASH 121BGA
Description original&Quality new original