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At24c512

mynet43mynet43 Posts: 644
edited 2011-05-31 21:38 in Propeller 1
I just received notice from DigiKey that P/N AT24C512BN-SH25-T is going obsolete.

This is the narrow SOIC surface mount version. I use it in several of my boards.

Does anyone know if there is an equivalent substitute available.

Thank you for your help.

Jim

Comments

  • MacTuxLinMacTuxLin Posts: 821
    edited 2011-03-09 16:30
    I use Microchip's 24LC512T-I/SMTR-ND
  • BeanBean Posts: 8,129
    edited 2011-03-09 17:49
    I have used the AT24C1024 it is a 128KB EEPROM.
    It works just like the AT24C512 but you use the next I2C ID to access the other 64K.

    If it's in the same package you should be able to use it.

    Bean
  • Cluso99Cluso99 Posts: 18,069
    edited 2011-03-13 18:32
    It seems more likely that it is just DigiKey discontinuing the Atmel parts.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2011-03-13 20:04
    The AT24C512 has been replaced by the AT24C512C. DigiKey does not currently stock this part. The Microchip part would be a good substitute.

    -Phil
  • Cluso99Cluso99 Posts: 18,069
    edited 2011-03-13 21:37
    The Microchip part is quite a bit more expensive tho'
  • SSteveSSteve Posts: 808
    edited 2011-05-31 09:15
    Phil Pilgrim (PhiPi) wrote: »
    The AT24C512 has been replaced by the AT24C512C.

    I just looked at Atmel's site and it says the AT24C512C is EOL and replaced by the AT24C512B. But Mouser shows that one as EOL and doesn't stock the Microchip part.

    Looking at the serial EEPROM page at Atmel's site makes it look like the AT24C64B and AT24C64D are the current 64k EEPROMs. I'm assuming these are drop-in substitutes for the AT24C512. Has anyone had any experience with these? I'm trying to find something I can get in small quantities from Mouser.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2011-05-31 09:20
    "64" means 64K bits, not bytes.

    -Phil
  • SSteveSSteve Posts: 808
    edited 2011-05-31 09:28
    Phil Pilgrim (PhiPi) wrote: »
    "64" means 64K bits, not bytes.

    Oh, duh. I don't know why I thought they would have changed their naming scheme. I guess we can get the AT24C512B for now and hope Mouser sells a qty 1 replacement in the future. Or that their EOL indicator is mistaken.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2011-05-31 09:33
    DigiKey has plenty of the 24LC512 in stock:

    -Phil
  • Cluso99Cluso99 Posts: 18,069
    edited 2011-05-31 20:30
    Atmel are just revving their parts and there is a number change in that too which makes it confusing. I presume when DigiKey have exhausted supplies of the existing chips they will stock the new revs. There is also a difference in the power supply range (IIRC 1.8V-3.6V and others 3V-5.5V and some do the lot). Since we use 3.3V it does not matter to the prop.
  • SSteveSSteve Posts: 808
    edited 2011-05-31 21:38
    Thanks, Phil & Cluso. I thought I had to get everything from Parallax and Mouser for this project but it turns out I can use Digi-Key too so I'll get the EEPROM from them. If we do go into production on this thing I'm sure there will be something compatible available. I've never had to spec parts for a project before (I've always been software-only) so I'm a little out of my comfort zone. I appreciate the hand-holding. :)
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