The NXP MKL16Z256VLH4 is a 32-bit ARM Cortex-M0+ microcontroller from the Kinetis KL1 series, clocked at 48 MHz with 256 KB of Flash and 32 KB of RAM. It has 54 I/O lines, a 16-bit ADC, a 12-bit DAC, and serial interfaces including I²C, SPI, UART/USART, LINbus, and TSI.
Rated from -40°C to 105°C, the MKL16Z256VLH4 can sit in an unventilated enclosure on a factory floor or under a dash in an off-highway vehicle. The 1.71 V to 3.6 V supply range means it runs directly from two alkaline cells or a single Li-ion cell without a boost regulator — useful for portable data loggers and handheld terminals. The internal oscillator saves an external crystal for non-critical timing, though the I²S peripheral suggests audio or serial audio data applications where a precision clock may still be needed.