Searching AVR microcontroller!

Hi! I´m looking for microcontroller to my 7seg display tempmeter project. (LM35DZ temp meter and 5641AH (12pin, CC) led display). Anyone know good product to that? (I´m looking for microcontroller i can rewrite with my Arduino) I don´t want to use crystal in it, it has to be very easy to use. Anyone know controller like that?

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Atmega328P

Atmega168P