What this MK20FX512VLQ12 brings to the board
The NXP MK20FX512VLQ12 is a Kinetis K20-series 32-bit ARM Cortex-M4 microcontroller running at 120 MHz. It carries 512 KB of Flash program memory, 128 KB of RAM, and a useful 16 KB of EEPROM on-chip — that last item saves you an external serial EEPROM on the BOM. The 144-LQFP package gives you 100 I/O pins, including a full set of connectivity: CAN, USB OTG, multiple SPI/I²C/UART, and an external bus interface. It is rated for -40 to 105 °C, which puts it in industrial and outdoor telecom territory, not just a bench toy.
120 MHz Cortex-M4 — what that means for throughput
The 120 MHz core handles real-time control loops and moderate DSP tasks without a separate coprocessor.
Memory map and the EEPROM advantage
512 KB Flash is enough for a substantial application stack — FreeRTOS, USB stack, and a CANopen node fit without squeezing. The 128 KB RAM supports double-buffered data acquisition or a small display frame buffer. The 16 KB EEPROM is the standout: it is true EEPROM, not emulated Flash, so you can write single bytes without erase cycles. That saves an external 24LCxx part and the I²C traffic. For calibration constants or fault logs that get written thousands of times, this is the right part.
Supply voltage and power domains
Lifecycle and sourcing
The MK20FX512VLQ12 is listed as Active in production. It is sourced and quoted to order against an RFQ through independent distribution.