The NXP MKL26Z128VFT4 is a 32-bit ARM Cortex-M0+ MCU from the Kinetis KL2 series, clocked at 48 MHz with 128 KB Flash and 16 KB RAM. It integrates a USB OTG controller, I²C, SPI, UART, and a 16-bit ADC plus 12-bit DAC — enough peripheral set for a USB-connected sensor hub or a human-machine interface node. The 48-VFQFN exposed-pad package (7x7 mm) keeps the board footprint tight, and the -40 to 105 °C operating range lets it sit in an outdoor telecom cabinet or an industrial enclosure without active cooling.
48 MHz Cortex-M0+ — what it buys you
The 48 MHz core handles a USB-OTG control loop or Modbus gateway with margin. It is not a DSP-class core.
128 KB Flash and 16 KB RAM — sizing the firmware
128 KB Flash holds a USB stack, a lightweight RTOS, and application code for a single-function device. The 16 KB RAM is tight for a large frame buffer.
Supply range and power budget
Runs from 1.71 V to 3.6 V. The brown-out detect and POR are on-chip.
Lifecycle and sourcing
NXP lists the MKL26Z128VFT4 as Active — no last-time-buy notice, no imminent obsolescence. The Kinetis KL2 family is a mature portfolio; NXP has not announced a direct replacement. For BOM continuity, the part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time.