[FoRK] magnetic RAM --- who's the target audience at this point?
Justin Mason <
jm at jmason.org
> on >
Tue Jul 11 05:09:27 PDT 2006
Whatever you do, do *not* read the Beeb for tech news; they are clueless.
If they manage to recycle a press release without making a fundamental
error, they're doing well.
Kragen Sitaker writes:
> So the BBC had a content-free slashdotted article about Freescale going
> into volume production of MRAM. Freescale's page is less content-free:
> says the MR2A16A is 4 megabits, 35ns read or write, and $25 apiece. Who
> would buy it at that price? Seems that 4-megabit 15ns SRAM chips cost
> $5-$10, which leaves plenty of budget for 4 megabits of flash. Is the
> idea that you get to drop your design's chip count by one? That you can
> erase a byte at a time, unlike flash? Does it last longer than flash?
> (The datasheet only recommends using it for five-year applications.)
> Does it use less power than SRAM? (The $4 70ns Cypress chip I compare
> it to below says it could have standby current of up to 20 microamps,
> while the MR2A16A advertises 1 microamp.)
> I'm excited to see non-volatile RAM coming back into the mainstream ---
> you can't get much more mainstream than Freescale --- but I don't
> understand what market Freescale is selling into at the moment.
> Everything except SRAM is much cheaper:
> Type Capacity Price Unit Price Reference
> MRAM 4 megabits $25.00 $25.00/4mb above Freescale page
> SRAM 4 megabits $3.98 $3.98/4mb Digi-Key 428-1075-ND
> NOR flash 4 megabits $1.35 $1.35/4mb Digi-Key AT26F004-SU-ND
> NAND flash 1 gigabyte $24.50 $0.012/4mb Lexar 1 gigabyte SD card
> via digi4me.com
> PC5600 SDRAM 1 gigabyte $150 $0.075/4mb Pricewatch page
> quotes Corsair
> TWIN2X1024-5400C4PRO at $159
> hard disks 400 gigabyte $200 $0.00025/4mb Pricewatch page
> ranges from $154 to $205
> In this environment where everything else (except SRAM) ranges from
> twenty times cheaper to a hundred thousand times cheaper, what's the
> market for MRAM priced like this?
> (I'd send a copy of this note to Freescale, but apparently I would have
> to agree to their "Extranet Access Agreement" first, so I won't bother.)
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