Kinetis K20: 100MHz Cortex-M4 Performance MCU, 512KB Flash, 64KB SRAM, Full-Speed USB, 144-MAPBGA
Freescale
Freescale - PK20DN512ZVLK10
Freescale - MK20DN512VLK10
* $9.05 - $9.67
Freescale - MK20DN512VLL10
* $9.75 - $14.90
Freescale - MK20DN512VLQ10
$10.38
Freescale - MK20DN512VMC10
Freescale - MK20DN512VMD10
$12.28