Hello Bob,

Microchip guarantees one million write cycles to their EEPROM. Isn't enough
for you?

Igor

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Robert E. Griffith
Sent: 13. ledna 2003 18:14
To: PICLIST@MITVMA.MIT.EDU
Subject: [PIC]: Looking for SPI RAM to replace SPI EEProm


I am looking for a serial (preferably SPI) plain RAM in an SO8 package.
Preferably 8 bit wide by 16k or 32k.  Anyone know of such a chip and where I
can get it?  Digi-key does not have anything like it.

I am using an SPI serial EEPROM (AT25128) attached to a 18F252 to add memory
to store a large sting table.  It does not need to be persistent but I was
unable to find any serial plain RAM.  Does it exist?  If not, is there a
reason?  My problem is that at 100K write cycles, it will ware out too soon
in my application.  The slower writes is acceptable.

I am considering switching to a parallel RAM, but I would rather not give up
the board space switching an SO8 for an SO32 which would also require
switching to the 40 pin 18F454 to get more I/O.  On the subject of parallel,
does anyone make a 8 bit wide parallel RAM that multiplexes address and data
on just 8 pins?

Thanks,

--BobG


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