utilityguy2

iTrader: (1)

I'm sure everyone has seen the warning about counterfeit chips on Moates.net website. Seeing that, I paid lots of attention to it when I went to purchase my next supply of chips. There are pictures on there of what to watch for so I was very leary of the good deal I found and requested pictures. They seemed fine and I ordered them. Well you can guess the outcome.

Instead of SST 27sf512 they were re-stamped Winbond W27C512 chips. The only difference I can tell from real is that the laser etched SST is a little bit lighter in color and do not have the made in Taiwan in the dimple on the back but it is stamped elsewhere. These Winbond chips will program OK with Flash and Burn but can not be erased with it. It will fail the blank test.

Of course the company I bought from blamed it on a supplier but also said "they were electrically compatible replacements". I countered that if I had wanted Winbond I would have ordered them and why then were they marked SST. Possibly because SST is worth more? I did get my money back but it was still a headache as I can not use them for customers and threw them in garbage where they belong. Can you believe they wanted them shipped back at my expense?

So beware of counterfeits. EBay is full of them and if they are less than $5 they probably are not genuine.

I believe there are only two sources for these discontinued chips as the remaining supply were bought up. Moates.net does have the genuine SST 27sf512 chips. I Don't remember off hand the name of the other company.
Sooner or later we are going to have to switch chips when the supply runs out, maybe the Winbond W27C512 is a possibility, but Moates would need to provide support for it. Also the 29F040 is compatible but it is a 32 pin chip instead of a 28 pin.

EagleMark

Buy good proven tested products from Moates and support their busness so they can keep making us cool products!

Scorp1us

If they really are electrically compatible, then the timing would be the only factor. The Moates pages have instructions on how to change the com port settings... maybe you just need a different value like 5 instead of 1?

Saar

i have some "SST" 27SF512s that have "Winbond" stamped on them... they work perfectly fine for me using a Burn2.

utilityguy2

iTrader: (1)

Winbond and SST are two different chip makers.

Saar

i realize this, but for some reason, mine have both markings... i'll take a pic if anyone is interested.

work perfectly fine, so i'm not complaining.

utilityguy2

iTrader: (1)

It is not a matter of data acquisition or communicating with a program such as TunerPro which your posting suggests but with burning the chip. That function does'nt use com ports.

utilityguy2

iTrader: (1)

The problem is that certain Companies selling on EBay and other wholesalers are taking cheaper chips and remarking them as higher priced and better items. That is counterfeiting. And is illegal.

utilityguy2

iTrader: (1)

That is strange. Good to see pictures and I'm going to post pictures of both of mine also.

As for working fine, have you burned a chip using flash and burn, then erased it and check for blank? These chips I have fail that test as being not blank.

I erase them using a willem that is compatible with windbond to erase and then it will pass the blank test. Nice thing about the willem GQ-4X is that it it provides a identification of all chips in its database. Failing the blank test on flash and burn concerns me that I could not trust them and what about people that get them later and want to modify them believing they are SST and can't? Not a good thought.

utilityguy2

iTrader: (1)

I agree of course! Unfortunately for me, I was assured beforehand and was shown pictures by a reputable reseller that these were in fact Genuine SST 27sf512 eeproms.
Giving them the benefit of a doubt, they could have been fooled too. They really do look good and hard to spot. They were also the older, "non-green" chips so there could be some small difference in looks. And they were laser etched not ink printed which means it was no small time outfit.

Saar

just did a 64KB BIN flash, verify, erase, blank check

all of which performed flawlessly.

pics aren't the greatest, but you'll notice the regular SST markings, then on the bottom, an additional M(circled), C(circled) 2001 Winbond.

full SST part number is SST27SF512 70-3C-PGE 0920082-C

backside is tough to see, but 2 dimples, one has "taiwan" in it, the other has L6 2 (2 underneath the L6). in the center: SSTEALE187 27SF512 0223071

hope this helps.

https://i.imgur.com/nMSSK.jpg
https://i.imgur.com/ggFKP.jpg

utilityguy2

iTrader: (1)

Hard to tell from your pictures but I think those are genuine, the back of yours appears correct. Maybe SST had Winbond make them on contract? As you said they do function correctly.

In my case they are not.

Here is a posting off of another website.

"most of the fakes are made with w27c512 and w27e512. Both of these chips are made by winbond. They are reprogrammable. But they use a different voltage to erase then the sst27sf512. The moates can not reprogram these (winbond). But any other burn that supports the winbond w27c512 or w27e512 can."

Saar

like i said, markings of both.... confused me at first, so when i first received them, i tested them all(got a pack of 5), they all worked correctly, so i didn't give it another thought.

utilityguy2

iTrader: (1)

Here are pictures of the chips. On the top is a known genuine SST. Sorry don't have backside but out of genuine chips at the moment.

Below that is the counterfeit. notice lighter color printing and different texture etching. Second picture is the back of the Counterfeit. Genuine chips have made in Taiwan inside dimple and a part number inside the other dimple. No printing otherwise. And the genuine chip has indent for pin 1

By the way, These chips are not reflective of photos I was shown prior to the purchase.

Tuned Performance

iTrader: (92)

Old thread I know, Does anyone know of a alternative eeprom that will work with the moates.net burn2.
Mouser shows the SST27SF512 70-3C-PGE 0920082-C is nla. Moates now charges $9 ea for the sst eprom.