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When purchasing AVRs note…
The -10xx means 10MHz max speed, -16xx means 16MHz, etc.
However, the speed the chip can run at is proportional to the voltage, check the datasheet for the max speed at a given VCC (its near the end)
The -nnPx means DIP, -nnAx means TQFP and -nnMx means QFN
The -nnxU means RoHS, -nnxI is not RoHS
The V postfix means "Low voltage" generally 1.8V+
The P postfix is 'picopower' which is a different chip fabrication technology, thus Atmega168P is compatible with but slightly different than the Atmega168. P parts can run as low as 1.8V
/home/ladyada/public_html/wiki/data/pages/partfinder/microcontroller.txt · Last modified: 2016/01/28 18:05 (external edit)