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RAM chip specs: HY51C4256S-10

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Michael

Jan 1, 1970
0
Looking for specs. on HY51C4256S-10 This is an old DIP RAM chip.
I tried the usual suspects including DataSheetArchive.com but no joy.

If I can't find this particular chip, is there a newer, compatible
chip? I have an old printer that would benefit from a few more megs of
RAM.

Tnx,
Michael
 
W

Watson A.Name - \Watt Sun, the Dark Remover\

Jan 1, 1970
0
Michael said:
Looking for specs. on HY51C4256S-10 This is an old DIP RAM chip.
I tried the usual suspects including DataSheetArchive.com but no joy.

If I can't find this particular chip, is there a newer, compatible
chip? I have an old printer that would benefit from a few more megs of
RAM.

Tnx,
Michael

Last week I tossed out a couple AST Ram 3000 cards with a meg of them on
each board. Sorry.
 
100ns 256Kx4 DRAM. Many SVGA cards of early 1990s vintage used these
chips. For example if you look at Trident 8900 or 9000 ISA SVGA cards
you will likely find some to scavenge.
 
M

Michael

Jan 1, 1970
0
Watson A.Name - \"Watt Sun said:
Last week I tossed out a couple AST Ram 3000 cards with a meg of them on
each board. Sorry.


Isn't that the way it always goes? It's happened to me before .... and
the other way around too.
 
M

Mark Hooks

Jan 1, 1970
0
Funny, I was just looking for this info myself. The best I could do was to
find the pinout. I have a tube of these. Here's the details:

Samsung DRAM, 256Kb, 1-Bit, Page Mode (120 ns), DIP16



41256 +---\/---+ 1 -|A8 gnd|- 16 2 -|Din /CAS|- 15 3 -|/WR Dout|- 14
4 -|/RAS A6|- 13 5 -|A0 A3|- 12 6 -|A2 A4|- 11 7 -|A1 A5|- 10
8 -|Vcc A7|- 9 +--------+I have a spare tube of these for trade if
anyone needs them.Mark
 
M

Mark Hooks

Jan 1, 1970
0
Well, my post got the pinout messed up. If you need it send me your email
address
 
It's nice that you've got a tube of 41256's for trade, but the chip the
OP posted about is "HY51C4256S-10" which is a Hyundai 100ns 256Kx4 fast
page mode DRAM, DIP20 package I believe.
 
M

Michael

Jan 1, 1970
0
It's nice that you've got a tube of 41256's for trade, but the chip the
OP posted about is "HY51C4256S-10" which is a Hyundai 100ns 256Kx4 fast
page mode DRAM, DIP20 package I believe.


Right you are! :)
 
W

Watson A.Name - \Watt Sun, the Dark Remover\

Jan 1, 1970
0
Michael said:
Isn't that the way it always goes? It's happened to me before .... and
the other way around too.

A few days ago I was cleaning out some more stuff, and I found 9 of
these chips. I'm not sure if they're the same thing. I think they're
from an old video card.

Mt4C256-7 The Mt means Micron Technology, IIRC. They're 70 nS chips in
a 20-pin DIP package. Date codes in early '92.

If you think they'll work, contact me at [email protected] and
include NOSPAM in the subject: line or i'll never see the email.
 
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