Based on 40 MHz ARM® Cortex®-M0+ core, FM0+ S6E1B-Series and S6E1C-Series feature low active current consumption of 40 µA/MHz. FM0+ S6E1B-Series provides up to 560 KB Flash and 102 GPIO for secure M2M communications with AES encryption. Supporting up to 128 KB Flash and 54 GPIO, FM0+ S6E1C-Series features 35 µA/CoreMark® score for wearables and wide range of ultra-low-power, battery-powered products. Devices come in small QFN and QFP packages.