Kinetis K20: 72MHz Cortex-M4 Performance MCU, 160KB Flash, 32KB SRAM, Full-Speed USB, 121-MAPBGA
Freescale
Freescale - MK20DX128VLH7
$12.14
Freescale - MK20DX128VLK7
$4.54 - $7.42
Freescale - MK20DX128VLL7
$7.91
Freescale - MK20DX256VLH7
$12.18
Freescale - MK20DX256VLK7
$9.72 - $13.09
Freescale - MK20DX256VLL7
$13.57