Rich,
   I have used 8k 16k and 256k parts.  The only compatibility issue I
have come across is the either 1 or 2 byte addressing, the external
select lines used, and the number of bytes per page for the
maximum you can write at once.

Martin

> Hi folks,
> I have a design which uses a 24C01- a 1K I2C part.
> I recently decided to try some 2K and 4K in its place however they did not
> work - due to the rush
> prior to Trade Show I went back 1K part. Does anyone use the higher capacity
> parts as replacements?
> Do you know of any compatibility probs?
>
> The reason I've been trying this is the 1K surface mount part seems to on
> short supply - any comments
>
> comments appreciated
>
> Rich