Cool dual die EPROM (perhaps a proto??)

[gg1978]

Just got this in from AVICC, i knew it was an unusual chip, but a picture's worth a thousand words I was thinking it was a microcontroller with a massive EPROM die with it.

I've looked at it under a microscope at work, it appears to have a pair of Toshiba TC574000 dice in it, presumably wired to operate in parallel as a 4Megabit x 16 EPROM, as it's in the correct 42 pin package that most 16 bit EPROMs use.


It appears the lid is glued on with epoxy, not using glass frit like windowed EPROMs usually have.

[Neon_WA]

freakn beautiful mate

can you take the pics with a little better light?

[CPUShack]

that is awesome!

[gg1978]

Well here's two better pictures of this thing Hopefully they're bright enough

[berni]

Hi,

I've just seen such an EPROM with a double die package in a Waverscal Integration Databook. Try to look for WS57C010M...

You can find the databook containing this chip here:
www.bitsavers.org/pdf/waferscaleIntegration/_dataBooks/1990_WSI_CMOS_Memory_and_High_Performace_VLSI.pdf

Cheers, Berni

[gg1978]

Cool you found a datasheet for such a weird device I'd love to actually see one of those WS57C210M modules, as they have no less than 4 256K dice in them, per the datasheet!!! THough they appear to have the same type of two windowed package as this one. The datasheet doesn't show the thickness of the package, though it's probably similar..