user34295: I am making an AC (the summer kind) control circuit with an AtMega328P chip. I bought the AtMega328P-PN instead of the P-PU. I followed the instructions on how to burn the bootloader, but nothing seems to work on the P-PN. I searched on Google for it and could find nothing anywhere. 
Thanks in advance,
Iain

user612: The ATmega328P-PN differs from the ATmega328P-PU essentially only in being rated over a wider temperature range.
It is for all ordinary purposes a direct substitute for where an ATmega328P-PU could be used, and has the same signature word.
Whatever your actual problem is, it is elsewhere.
(The chips that do require some special accommodation if ordered are the ATmega328 without a "P" before the dash and the ATmega328PB)

34295: <p>I am making an AC (the summer kind) control circuit with an AtMega328P chip. I bought the AtMega328P-PN instead of the P-PU. I followed the instructions on how to burn the bootloader, but nothing seems to work on the P-PN. I searched on Google for it and could find nothing anywhere. </p>

<p>Thanks in advance,</p>

<p>Iain</p>
 612: <p>The ATmega328P-PN differs from the ATmega328P-PU essentially only in being rated over a wider temperature range.</p>

<p>It is for all ordinary purposes a direct substitute for where an ATmega328P-PU could be used, and has the same signature word.</p>

<p>Whatever your actual problem is, it is elsewhere.</p>

<p>(The chips that <em>do</em> require some special accommodation if ordered are the ATmega328 <em>without</em> a "P" before the dash and the ATmega328PB)</p>
