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'>16Kbit serial EEPROMS?'
1996\11\02@141552 by Matthew Mucker

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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."

1996\11\02@150419 by Ian Stirling

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>
> 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}

--
Ian Stirling.                        |  http://www.mauve.demon.co.uk/
AKA Caeser, Bolonewbie.              |  With information on the PDA I'm making.

1996\11\02@151913 by Byron A Jeff

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>
> 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.

>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.

Check out digikey at http://www.digikey.com

BAJ

1996\11\03@032419 by Dorin Dogaroiu

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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}

1996\11\04@092825 by Wireless Scientific

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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_OUTwsciTakeThisOuTspamnet-magic.net

Or you might know me as
Dr. Craig Hollabaugh
Analog Microelectronics, Georgia Institute of Technology
.....hollaKILLspamspam@spam@monique.adgrp.gatech.edu

or

Dr. Craig Hollabaugh
Aerospace Department, University of Texas, Austin
hollaspamKILLspamcfdlab.ae.utexas.edu

1996\11\04@092829 by Wireless Scientific
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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
.....wsciKILLspamspam.....net-magic.net

Or you might know me as
Dr. Craig Hollabaugh
Analog Microelectronics, Georgia Institute of Technology
EraseMEhollaspam_OUTspamTakeThisOuTmonique.adgrp.gatech.edu

or

Dr. Craig Hollabaugh
Aerospace Department, University of Texas, Austin
hollaspamspam_OUTcfdlab.ae.utexas.edu

1996\11\04@093654 by Wireless Scientific

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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.

1996\11\04@121032 by John Magrane (IsMail)

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>>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@jmagraneKILLspamspambellind.com

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