Kinetis K6x Series Microcontrollers The Kinetis K6x MCUs are pin-peripheral and software-compatible with many of the Kinetis K series MCU families, offering IEEE® 1588 Ethernet and full and high-speed USB 2.0 On-The-Go, including options with USB crystal-less functionality. Devices start from 256 KB of flash in 100 QFP packages extending up to 1MB flash and 256KB SRAM in a 256 MAPBGA package. These devices offer various levels of integration, with a rich suite of analogue, communication, timing and control peripherals. Next-generation Kinetis K6x MCUs are further optimized for performance and power consumption and offer more streamlined integration for further BOM cost reductions. The K6x Ethernet MCUs are Energy-Efficient Product Solutions.