LF / WTB : 29c256 E-EPROMs

steph

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I need 4 or 6 29c256 E-Eproms.

(...not the 27c256 UV Eproms )

Let me know if anyone has this.

Thanks,
Steph
 
Steph, getting ready to do a huge order. I will see if I can grab some if they have em.
Also, searched the stock list of this new supplier for proms and came up empty other than the ones we already discussed. I did pick up around 300 2716 and a couple thousand various rams.
 
The supplier I am ordering from does not have them but another supplier has qty 56. I can get them for you but the price will be a little high because of small qty buy and shipping. I typically buy several thousand chips at a time so shipping only adds a couple cents to the part price. Anyways if you like pm me a target price and I will see what I can do.

Qty 56 AT29C256-25DC ATMEL
 
Just curious... what needs a 29C256 that can't be replaced with a 27C or 29F? Does it have to be in system programmable or something?

DogP
 
Just curious... what needs a 29C256 that can't be replaced with a 27C or 29F? Does it have to be in system programmable or something?

27c is not Electrically erasable (it's UV only )
so any device which needs to update data on-board can not use a 27c.

29F "might" work, but flash eproms are erased differently
so a PCB expecting to erase a 29c might not work with a 29F .

Steph
 
27c is not Electrically erasable (it's UV only )
so any device which needs to update data on-board can not use a 27c.

29F "might" work, but flash eproms are erased differently
so a PCB expecting to erase a 29c might not work with a 29F .

Steph

Right... I was just curious what you were using it for, if you didn't mind saying. I just don't see a lot of old boards using 29C or 29F chips for changing data... EEPROMs like 28C chips, and battery backed SRAM seem much more popular, where 27C, 29C, and 29F are commonly used for program ROM (which can usually get away without in system programming).

DogP
 
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