They state a maximum operating voltage of 6.25V, but there are no specs for
operating voltages above 3.6V.

My question is whether anybody has used these or similar parts at 5V (I
assume that's something rather common) and can tell me whether they work
"normally" (of course I don't expect a full 5V spec sheet :)

I assume they work normally, but I'm not sure what deviations to expect.
Any ideas?


BTW, the spec sheet states that the inputs are not 5V tolerant: the maximum
input high voltage (Vih) is given with Vcc+0.5V, so if you supply the chip
with 3.3V, you probably shouldn't try to drive the inputs with more than
3.8V without special measures (like a current limiting resistor).

Also the outputs are not quite 5V "tolerant": even at 3.6V supply, the
guaranteed output high voltage is 3.4V, which is enough to drive an input
with TTL levels (2V), but not quite enough for e.g. a Schmitt Trigger PIC
input (0.7...0.8 Vcc = 3.5V...4V in a 5V system). And the SDI input is
typically a ST type input.

Thanks,
Gerhard

> i think they mean any pin other than power.
>
> if its like their dataflash the logic lines are 5v tollerent.
>
> -----Original Message-----
> I'm looking into using a serial flash like the Atmel AT25F1024. In the
> datasheet, they give the max. voltage on any pin as 7V, but all the specs
> are for the recommended operating voltage range of 2.7V to 3.6V.
>
> Has anybody any experience with running these chips on 5V? Looks like it
> should be possible.

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