Kinetis K50: 100MHz Cortex-M4 Performance MCU, 512KB Flash, 128KB SRAM, Full-Speed USB, 100-LQFP
Freescale
Freescale - MK50DN512CLL10
$11.24 - $12.70
Freescale - MK50DN512CMC10
$10.50
Freescale - MK50DX256CLL10
$9.11 - $9.97
Freescale - MK50DX256CMC10
Freescale - MK50DN512CLQ10
$22.29
Freescale - MK50DN512CMD10
$17.42 - $12.28