Can anyone suggest a DIL IC where I can store a couple bits of memory without having to use a complicated interface like serial, I2C, and etc. I want to be able to store at least 2 bits of memory to about 16 bits. An interface like this: http://pdf.datasheetarchive.com/datasheetsmain/Datasheets-X2/DSA848000-34.pdf (Unfortunately that IC does not exist anymore, but that was RAM anyways) ...is the kind I'm looking for, just except that the memory is permanent. I used a 4013 to try to store permanent memory and it seemed like it worked (after setting Q to be on, disconnecting the battery for a day and coming back to see it at the same state) but sometimes it screwed up and forgot.

Also I do not want an answer that suggests me to program a PIC or something as such to behave as a EEPROM/Flash storage device. I'm aware of that being an option but I'm not too keen with that.

  • \$\begingroup\$ Oh well what is the point of downvoting on a post made 2 months ago? Although off topic, I'm pretty sure it can come in handy for other people in specific cases. \$\endgroup\$
    – Bradman175
    Aug 10, 2016 at 12:03

1 Answer 1


If you don't want to use something simple like a DIPswitch, you could use a parallel EEPROM, some of which are available even today.

Eg. AT28C64. Just ignore the 99.98% of the memory you won't be using.

  • \$\begingroup\$ Nice find. I will accept more answers in case other people have other IC recommendations. \$\endgroup\$
    – Bradman175
    Apr 11, 2016 at 4:18
  • \$\begingroup\$ Now... I have trouble finding where I can buy the IC. Everything on eBay seems so fake. \$\endgroup\$
    – Bradman175
    Apr 11, 2016 at 4:51
  • 2
    \$\begingroup\$ @Bradman175 - Then stop looking for the parts on eBay. Check out the reputable suppliers such as Digikey and Mouser. BTW Mouser has several thousand of the AT28C64 in stock in 28-pin DIP package for less than 4USD each. \$\endgroup\$ Apr 11, 2016 at 5:29
  • \$\begingroup\$ Shipping costs... \$\endgroup\$
    – Bradman175
    Apr 11, 2016 at 5:35
  • \$\begingroup\$ There are electronics retailers that operate in your country. Try for example au.element14.com. They also have the AT28C64 although price is about 2x higher. \$\endgroup\$ Apr 11, 2016 at 5:41

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