ARM Cortex-M4 at 72 MHz — what it means for the control loop
The MK20DX128VLK7: 32-bit ARM Cortex-M4 MCU from the Kinetis K20 family, clocked at 72 MHz. 128 KB Flash and 32K x 8 RAM support a firmware image with a real-time OS and USB device stack.
Industrial temperature grade and peripheral set
Rated for -40°C to 105°C ambient, this MCU fits outdoor telecom cabinets, factory-floor motor drives, and engine-bay auxiliary modules. The 52 general-purpose I/O are available in an 80-LQFP package (12x12 mm body), which is a common footprint for medium-density control boards. On-chip peripherals include CANbus, USB with OTG, multiple SPI/I²C/UART channels, an I²S audio interface, and a 27-channel 16-bit ADC plus a single 12-bit DAC. The internal oscillator eliminates the external crystal for UART and CAN at moderate baud rates, though a precision external clock is advisable for USB full-speed operation.
Active lifecycle — no obsolescence risk for new BOMs
The MK20DX128VLK7 carries an Active product status from NXP. That means the manufacturer continues to produce the part, and no last-time-buy or end-of-life notice is in effect. For a BOM line that needs a proven Cortex-M4 with industrial temperature range and a balanced memory/peripheral set, this part is a safe choice for both prototyping and volume production. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.