On 28/11/2008 21:41, Chris Elmquist wrote:
Does anyone have a datasheet for these parts?
Although, by the part number alone, one might
suspect they are a
32Kx1 device possibly...
I don't have a datasheet but I found several equivalences in a Toshiba 1982
databook. MSM37xx designates MOS DRAM, MSM21xx is MOS static RAM, MSM51xx
is CMOS SRAM, and MSM27xx is EPROM. I found the more of the same in an NEC
databook, but of all the memory databooks I've got, the 1982 Toshiba is the
only one listing any MSM37xx devices.
OKI MSM3764-xx is an exact equivalent of a 4164, and the 2-digit suffix
gives the speed in tens of ns. I'd guess that an MSM3732-20 is 32Kx1,
200ns access time, and likely consists of an MSM3764 with one half disabled
or dysfunctional. If so, the 'RS' may signify which half works.
Thank you Peter. That pretty much confirms my suspicions. Can't for the
life of me remember what piece of gear would have used them. Must have
been some memory expansion board for a PC that I had at one time. That's
all I can figure...