Using ATmega128 at 3.3 Volt input supply

[keen bm]

Hey every buddy,
I want to use my ATmega128 with 3.3V input supply...

is it possible?
and if possible then is it great deal to save power?

In my application i wont be able to change or charge my battery frequently so i need controller which can work on less voltage and less power supply.

 

[ashokok]

ATMEGA128 Operating Voltage is 4.5 - 5.5V
ATmega128L Operating Voltage is 2.7 - 5.5V
ATmega128A Operating Voltage is 2.7 - 5.5V

at 5 Volt you can run the controller up to 16 MHz
at 3.3Volt approximately max 10 MHz

P.Ashok Kumar