The ATmega128RFA1 has been designed using Microchip's advanced CMOS 0.15µm process technology, allowing 16MHz operation down to 1.8V. True 1.8V operation ensures that all functions work all the way down to a 1.8V operating voltage. Lowering the operating voltage is one of the most efficient ways to cut the power consumption, so all low-power designs should always run at the lowest possible voltage. True 1.8V operation also allows deeper battery discharge voltage compared to traditional solutions where the ADC, EEPROM, or other functions stop working at 2.5 or 2.2V.