Kinetis K20 MCU with Cortex-M4 at 100 MHz — what it brings to the BOM
It carries 128 KB of Flash and 24 KB of RAM, with a 1.71 V to 3.6 V supply range.
100 MHz Cortex-M4 — what the clock buys you
The 100 MHz ARM Cortex-M4 core handles real-time control loops and DSP-style filtering without a coprocessor. The USB OTG interface can sustain bulk transfers without stalling the application.
Memory sizing for the firmware budget
128 KB Flash and 24 KB RAM partition for a USB composite device with a modest RTOS, leaving headroom for a bootloader and OTA update staging buffer.
Industrial temperature range and BGA package realities
The 64-MAPBGA (5x5 mm) package requires a multi-layer PCB with microvias.
The active lifecycle means no date-code windowing or last-time-buy constraints; lead times reflect normal semiconductor supply conditions.