I'm searching for a source of a DRAM memory IC that would have the
following specs:
20-pin DIP DRAM memory chips
(16) 1meg x 4-bit dips make up a bank of 8mb.
Should be 60-ns
Fast Page Mode
non-parity
An example would be Toshiba TC514400AP-60.
Other manufacturers might use the following base part numbers:
Fujitsu MB : 814400
Goldstar GM : 71C4400
Hitachi HM : 514400
Hyundai HY : 514400
Micron MT : 4C4001
Mitsubishi M5M: 44400
Any idea where I could find these would be appreciated.
I'm even up to pulling the DRAM from some old boards, if I can find
someplace that has boards that contain these chips. Maybe an old
printer buffer memory card or something. Certain Epson ActionLaser
printers contained the correct chips.
There's some surface mount versions that won't work, and there's also a
26/20-pin version that won't work. These incorrect dips would have
20-pins, but are laid out in a 26-pin configuration with 10 pins on each
side, separated by a small (3-pin) gap on either side. These seem
popular, but unfortunately, they won't work!
Thanks!
Keith
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