I haven't found a hardened Arduino yet. If you do, please tell me.
(I don't know what people are looking at at digikey; I can't see and "eol" notices for any 328 varieties...)The ATmega328 is not so much end-of-lifed as replaced by the nearly identical ATmega328P. I think that the current generation of Arduinos has ALWAYS used the ATmega328P variety; it's just that the differences haven't been particularly relevant to the audience. Certain particularly paranoid microcontroller customers will have to do another round of "qualification" testing of the chip within the context of their product to make sure that it REALLY hasn't changed in any significant way, but Arduino is not likely among these.The Atmel site says that ATmega8, ATmega168, and ATmega168P, are ALL "not recommended for new designs." They're replaced by ATmega8A and ATmega168PA respectively...
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