50 MHz Cortex-M4 with USB OTG in a 48-pin LQFP
The MK20DX64VLF5 is a 32-bit ARM Cortex-M4 microcontroller clocked at 50 MHz with 64 KB Flash, 16 KB RAM, and 2 KB EEPROM on-chip. It integrates USB OTG, an 11-channel 16-bit ADC, and serial interfaces (I²C, SPI, UART/USART, IrDA) in a 48-LQFP package.
Memory and peripheral budget for a dedicated controller
With 64 KB of program Flash and 16 KB of SRAM, this MCU is sized for a single-function control task — a sensor hub, a brushless-DC motor controller, or a USB-to-serial bridge — not a multi-application host. The 2 KB EEPROM provides non-volatile parameter storage without external memory, useful for calibration constants or fault logs that must survive a power cycle. The 11-channel 16-bit ADC captures analog signals with enough resolution for current-sense or temperature-monitor inputs; the DMA engine can move ADC results to RAM without CPU intervention, keeping the 50 MHz core free for control loops.
Industrial temperature and supply range
The -40°C to 105°C operating range qualifies the part for outdoor telecom cabinets, factory-floor motor drives, and under-hood automotive auxiliary modules (though it is not AEC-Q100 listed). The wide 1.71 V to 3.6 V supply allows direct battery operation from two alkaline cells or a single Li-ion cell, and the internal oscillator eliminates the need for an external crystal in many applications, saving two pins and board area.