Post by thread:>16Kbit serial EEPROMS?

My next project would need a lot of EEPROM-- I figure about 2Kbytes, but more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was wondering if there were any serial EEPROM devices out there larger than that, wnd what the approximate cost is in units of one. I think I have to go serial, 'cuz there aren't enough pins on a '54 to address a whole word of external memory without a lot of support circuitry, which would add a lot of cost. Thanks-Matt "DOS Computers manufactured by companies such as IBM, Compaq, Tandy, and millions of others are by far the most popular, with about 70 million machines in use wordwide. Macintosh fans, on the other hand, may note that cockroaches are far more numerous than humans, and that numbers alone do not denote a higher life form."

> > My next project would need a lot of EEPROM-- I figure about 2Kbytes, but > more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was > wondering if there were any serial EEPROM devices out there larger than > that, wnd what the approximate cost is in units of one. I think I have to Xicor's serial flash may be interesting, up to 64kbit I think, try http://www.xicor.com/ {Quote hidden}> go serial, 'cuz there aren't enough pins on a '54 to address a whole word > of external memory without a lot of support circuitry, which would add a > lot of cost. > > Thanks-Matt > > > "DOS Computers manufactured by companies such as IBM, Compaq, Tandy, and > millions of others are by far the most popular, with about 70 million > machines in use wordwide. Macintosh fans, on the other hand, may note that > cockroaches are far more numerous than humans, and that numbers alone do > not denote a higher life form." > -- Ian Stirling. | http://www.mauve.demon.co.uk/ AKA Caeser, Bolonewbie. | With information on the PDA I'm making.

Try 24C65 ( made by Microchip and others ) which has an IIC interface and also has pins for selecting the address of the chip, so you can use multiple chips on the same IIC bus ( I don't remember exactly but I think that you can use 8 chips ). IIC routines for PICs you can find in AN541 and AN555 from Microchip. Best regards, Dorin {Quote hidden}>My next project would need a lot of EEPROM-- I figure about 2Kbytes, but >more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was >wondering if there were any serial EEPROM devices out there larger than >that, wnd what the approximate cost is in units of one. I think I have to >go serial, 'cuz there aren't enough pins on a '54 to address a whole word >of external memory without a lot of support circuitry, which would add a >lot of cost. > >Thanks-Matt > > > "DOS Computers manufactured by companies such as IBM, Compaq, Tandy, and >millions of others are by far the most popular, with about 70 million >machines in use wordwide. Macintosh fans, on the other hand, may note that >cockroaches are far more numerous than humans, and that numbers alone do >not denote a higher life form." >

At 2:22 PM 11/2/96, Matthew Mucker wrote: >My next project would need a lot of EEPROM-- I figure about 2Kbytes, but >more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was >wondering if there were any serial EEPROM devices out there larger than >that, wnd what the approximate cost is in units of one. I think I have to >go serial, 'cuz there aren't enough pins on a '54 to address a whole word >of external memory without a lot of support circuitry, which would add a >lot of cost. National make a 8Mbit serial flash part. check their site. craig ________________________________________________________ Dr. Craig Hollabaugh Wireless Scientific, Inc. 1890 South 14th Street Building 100, Suite 105 Amelia Island, FL 32034 904 261 6977 904 261 2129 fax spam_OUTwsciTakeThisOuTnet-magic.net Or you might know me as Dr. Craig Hollabaugh Analog Microelectronics, Georgia Institute of Technology .....hollaKILLspam@spam@monique.adgrp.gatech.edu or Dr. Craig Hollabaugh Aerospace Department, University of Texas, Austin hollaKILLspamcfdlab.ae.utexas.edu

At 3:02 PM 11/2/96, Ian Stirling wrote: >> >> My next project would need a lot of EEPROM-- I figure about 2Kbytes, but >> more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was >> wondering if there were any serial EEPROM devices out there larger than >> that, wnd what the approximate cost is in units of one. I think I have to > > >Xicor's serial flash may be interesting, up to 64kbit I think, try >http://www.xicor.com/ I've prototyped the XICOR 24F128 connected to a '73. It worked fine with a CCS compiled C program. craig ________________________________________________________ Dr. Craig Hollabaugh Wireless Scientific, Inc. 1890 South 14th Street Building 100, Suite 105 Amelia Island, FL 32034 904 261 6977 904 261 2129 fax .....wsciKILLspam.....net-magic.net Or you might know me as Dr. Craig Hollabaugh Analog Microelectronics, Georgia Institute of Technology EraseMEhollaspam_OUTTakeThisOuTmonique.adgrp.gatech.edu or Dr. Craig Hollabaugh Aerospace Department, University of Texas, Austin hollaspam_OUTcfdlab.ae.utexas.edu

At 3:19 PM 11/2/96, Byron A Jeff wrote: >> >> My next project would need a lot of EEPROM-- I figure about 2Kbytes, but >> more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was >> wondering if there were any serial EEPROM devices out there larger than >> that, wnd what the approximate cost is in units of one. > >Microchips 24X65 are 64Kbit parts and are addressable so that 8 of them >can live on a 2 bit I2C bus. thats 64KBytes for about $40. and 2 IO pins. National's new 8Mbit serial part costs around $20.

>>National Semi makes 16Kbit serial EEPROMS, but I was wondering if >>>there were any serial EEPROM devices out there larger than that, wnd >what the approximate cost is in units of one. Microchip makes serial eeproms up to 64kbits. The 24C65 is $2.64 is single units in DIP. John Magrane Field Apps Eng Bell Industries 408 734-8570 @spam@jmagraneKILLspambellind.com