What kind of RAM stick is this?

Question

Specifically, what are those two modules in the middle of each? I'm not too familiar with components this old. I've figured out that they're sticks of SEC SDRAM, but I've found nothing about any of the components. I also haven't seen any pictures of SDRAM with those two modules.

The ICs in the middle are claimed to be buffers/bus drivers. Easily searchable. — dave, Jan 03 '22 at 00:26
"this old"? Those probably come from a Pentium class machine. Around here, that should count as recent... ;-) — Michael Graf, Jan 03 '22 at 15:14
I know it's not "that" old I'm just young and didn't know how else to word it lol. — truehd, Jan 03 '22 at 16:39

Raffzahn · Accepted Answer · 2022-01-03T14:00:42.693

33

Despite the 144 pin DIMM form factor, this is not a SDRAM, but an EDO module with 16 MiB capacity.

The used RAM chips are

KM48C2104 (KM48 marks RAMs)
Manufactured by Samsung, of
16 MiBit Capacity
EDO-RAMs, with
2Mi by 8 Organization and
60ns speed (the -6 marking)

They are not SDRAM, as such would be numbered as KM48Sx with X being L for 66 MHz and H for 100 MHz.

The additional chips, 74FCT162244 are 16 bit line driver, organized as 4 independent groups of 4 drivers each.

edited Jan 03 '22 at 14:00

answered Jan 03 '22 at 01:08

Raffzahn

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@truehd those drivers are quite nice the moment one notes their timing parameters :)) – Raffzahn Jan 03 '22 at 17:03
1

IDT stuff tends to be Quite Nice (and Not Cheap) – Michael Graf Jan 03 '22 at 21:52
@MichaelGraf True, then again, those line drivers are rather generic, developed and manufactured by many suppliers. – Raffzahn Jan 03 '22 at 23:12

What kind of RAM stick is this?

1 Answers1