Kinetis K 32-bit MCU, ARM Cortex-M4 core, 512KB Flash, 120MHz, USB, QFP 144
Freescale
Freescale - MK21FN1M0VLQ12
$20.01
Freescale - MK21FN1M0VMC12
$11.01 - $11.56
Freescale - MK21FN1M0VMD12
Freescale - MK21FX512VMC12
$10.24
Freescale - MK21FX512VMD12
$9.55 - $13.85