Description: Atmel’s ATMega328P 8-Bit Processor in 28 pin DIP package. It’s like the ATmega168, with double the flash space. 32K of program space. 23 I/O lines, 6 of which are channels for the 10-bit ADC. Runs up to 20MHz with external crystal. Package can be programmed in circuit. 1.8V to 5V operating voltage!
Based on 2 ratings:
I configured mine to run with 8MHz crystals because I have too many. No problems at all. Can also be set to use no crystal.
As the title says, not only did it work as expected, but it is also decently forgiving if you happen to wire things up wrong.