Will the AT90S8515-8 run at 3.3V ?

[ron]

AT90S8515-8 at 3.3v ???

Hi all,
Atmel specify that there AT90S8515-8 AVR device will run as low as 4v, but my question is will it run at all from a 3.3v supply if run at at lower speed maybe ???
I know the AT90S8515-4 will run fine at 3.3v as it is specified as so, but I only have access to the -8 devices !

Many Thanks.

Ron.

 

[bogdanm]

I heard a few oppinions about if this can be done in practice. I heard some people saying that they used 5V devices at 3.3V without problems and other people saying that they couldn't do this. One thing is for sure: Atm*el doesn't guarantee that you can use 3.3V on your device, so the best option is to find a dedicated 3.3V device. This way you won't bang your head against the wall in frustration, trying to understand why your perfect program won't execute correctly on your micro.

 

[jacopo]

Re: AT90S8515-8 at 3.3v ???

If u use a low frequency from 450Khz to 800Khz AT90S8515-8 can work at
3.0V with very low power.

 

[ME]

Since the AT90S8515 is obsolete, I would recommend you to use the new replacement ATmega8515 instead.
The ATmega8515L can operate from 2.7 - 5.5V @ 0 - 8MHz.
The ATmega8515 can operate from 4.5 - 5.5V @ 0 - 16MHz.

AVR085: Replacing AT90S8515 by ATmega8515: http://www.atmel.com/dyn/resources/prod_documents/doc2519.pdf

 

[TheHungry]

I use a 1Mhz crystal in AT90S8515-8 and no problem in 3.3v.