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- Path: watnews.watson.ibm.com!kgold
- From: kgold@watson.ibm.com (Ken Goldman)
- Newsgroups: comp.sys.m68k
- Subject: Re: Need DRAM source for 68302 design
- Date: 1 Feb 1996 14:06:34 GMT
- Organization: IBM T.J. Watson Research Center
- Distribution: world
- Message-ID: <4eqhda$g2e@watnews1.watson.ibm.com>
- References: <310F0231.2339@z9.com>
- NNTP-Posting-Host: elena.watson.ibm.com
-
- George Pontis <geo@z9.com> writes:
-
- > I would like to design in 1M total DRAM for a 25MHz 68302 project.
- > But since I don't have any experience with DRAM, I'm unsure what parts
- > to choose. In particular, is there some widely used DRAM chip that is
- > likely to be available for at least 3 yrs. ? (Purchasing will have me
- > shot if they have to jump through too many hoops to get the parts.)
- >
-
- Your best bet would be to survey the DRAM manufacturers.
-
- But (for what it's worth), the 4 mbit part seems to be mainstream
- now with the 16 mbit part ramping up. I would guess that either would
- be safe for 3 years.
-
- Historically, the smaller width parts were more popular. For example,
- a 4m x 1 was cheaper than the 1m x 4. This might be changing as
- the densities increase. There is a trend toward wider parts to
- increase bandwidth.
-
- The 4 mbit part now comes in x1 through x16. So you could make your
- 1M (I assume you mean 1 mbyte) with two 256K x 16 parts.
-
- Anyone else have an opinion (even if it is off-topic)?
-
- --
- Ken Goldman kgold@watson.ibm.com
-