I've never come across a serial ram package before in my experience and would think such a thing defies the purpose of ram, however from your situation it would make sense for such a thing to exist. I take it that you've considered using a serial to parallel shift reg and a 25128 size equivalent 32k ram package but due to lack of board space (as you hinted) this is not an option - if not, consider this option! May I ask why your application is needing to write so many times to a temporary serial storage device anyway? One suggestion is to port your application to a proper micro with address lines, or at least somthing with more onboard memory. Another suggestion is to build a serial static ram into a pld of some sort, this may also have a second advantage of storing any other logic you may be needing in your application and in turn save development cost, board size and probably power consumption also....
Cheers Mikael ---------------------------------------------------------------------------- --- Mikael Stewart mob: +64211887798 icq: 34818797 ---------------------------------------------------------------------------- --- ----- Original Message ----- To: Multiple recipients of list CHIPDIR-L Sent: Tuesday, January 14, 2003 10:18 AM 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 larger 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 -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics -- Author: Mikael INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
