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What is the operating voltage of Atmega2560?

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What is the operating voltage of Atmega2560?

(a) 12V to 9V

(b) 1.9V to 5V

(c) 2V to 12V

(d) 1.8V to 5.5V

I have been asked this question at a job interview.

This question is from Microcontroller Specifications topic in portion AtMega Microcontroller Specifications of Arduino

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Right option is (d) 1.8V to 5.5V

To explain I would say: The operating voltage of the Atmega2560 is 1.8V to 5.5V. Provide any voltage lower than that and the chip will not function. But however, if any voltage higher than the rated voltage is provided there is a chance of damaging the IC physically. So, under no circumstance should this chip be provided a voltage more than the rated voltage.

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