Hi all, a rather puzzling ebay story: I make small boards with small SRAM modules 8Kx8. Sometimes, ebay auctions are too good with respect to digikey's and other distributor prices. So I took the chance (I can return the obvious fakes most of the times). Chips are marked UT6264CSC-70LL, so I downloaded the datasheet for them that floats on the internet and ordered a few, since they have the needed specifications for my boards (at least on the datasheet). Once they arrive, I solder a couple in place, and sure enough, they hang the data bus firmly. After some troubleshooting, turns out that the CE2 on pin 26 is actually not connected (I use both CEs), there're not even the protection diodes to the rails that I could measure, looks NC like pin 1. All the rest is good, they are indeed 8kx8 chips, with correct low power standby and all I could test looks right. Now, I tried to contact the seller with no answers back. My question is: how likely is the datasheet is actually wrong on the CE2 part? I know there're 8Kx8 SRAMs without the CE2 input, but why one would bother to mark them as fakes? I think I'm going anyway leave at least a neutral feedback due to the seller disappearing when I notified a problem. But I would surely leave a negative if I can be sure that the part numbers don't meet the datasheet. Any clue (yes, I'm not going to buy electronic parts off ebay anymore)? Frank
- posted
7 years ago