Large/Fast static RAM

I'm trying to determine if anyone makes a large/fast static RAM part.  16M
(or more) x 16 bits (or more), 10ns.

I can't afford the address-to-data-out latency of dynamic RAM.  There are
ways around this, of course, but SRAM would be so much simpler.

Any ideas?

Thanks,


-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Euredjian

To send private email:
0_0_0_0_@pacbell.net
where
"0_0_0_0_"  =  "martineu"

I don't believe that you'll find a monolithic 16Mx16 SRAM.  You'll need
multiple devices.  You can start your search on QuestLink.  There are plenty
of 10 ns, x16 asynchronous RAMs out there.  There are also some x32, 200
MHz+ synchronous RAMs.

http://www.questlink.com/categorySearch_sub.jhtml?type=cat&param=130700

-- Steve Knapp

"Martin Euredjian" <0_0_0_0_@pacbell.net> wrote in message
news:lEgLb.1476$rt.397@newssvr29.news.prodigy.com...
> I'm trying to determine if anyone makes a large/fast static RAM part.  16M
> (or more) x 16 bits (or more), 10ns.
>
> I can't afford the address-to-data-out latency of dynamic RAM.  There are
> ways around this, of course, but SRAM would be so much simpler.
>
> Any ideas?
>
> Thanks,
>
>
> -- 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Martin Euredjian
>
> To send private email:
> 0_0_0_0_@pacbell.net
> where
> "0_0_0_0_"  =  "martineu"
>
>

Martin Euredjian <0_0_0_0_@pacbell.net> wrote:
: I'm trying to determine if anyone makes a large/fast static RAM part.  16M
: (or more) x 16 bits (or more), 10ns.

: I can't afford the address-to-data-out latency of dynamic RAM.  There are
: ways around this, of course, but SRAM would be so much simpler.

4Mibit Devices are in full production (256kix16). I guess it will take some
time until  256MiBit are available.

Bye

-- 
Uwe Bonnes                bon@elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------

Check ISSI, they have a 18 Mb (x18,x36,x72), synchronous static ram.
Seems they have a very low latency, and support bursts.


"Martin Euredjian" <0_0_0_0_@pacbell.net> ha scritto nel messaggio
news:lEgLb.1476$rt.397@newssvr29.news.prodigy.com...
> I'm trying to determine if anyone makes a large/fast static RAM part.  16M
> (or more) x 16 bits (or more), 10ns.
>
> I can't afford the address-to-data-out latency of dynamic RAM.  There are
> ways around this, of course, but SRAM would be so much simpler.
>
> Any ideas?
>
> Thanks,
>
>
> -- 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Martin Euredjian
>
> To send private email:
> 0_0_0_0_@pacbell.net
> where
> "0_0_0_0_"  =  "martineu"
>
>

I see IDT has 1M x 18 ZBT.  You are right, 256M is probably far off.  I
posted on the outside chance that there was an obscure part out there that I
didn't come across.  These days searching on the net can produce so many
links that it is humanly impossible to sort through all of them.


-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Euredjian

To send private email:
0_0_0_0_@pacbell.net
where
"0_0_0_0_"  =  "martineu"


"Uwe Bonnes" <bon@elektron.ikp.physik.tu-darmstadt.de> wrote in message
news:btk8ac$3ur$1@news.tu-darmstadt.de...
> Martin Euredjian <0_0_0_0_@pacbell.net> wrote:
> : I'm trying to determine if anyone makes a large/fast static RAM part.
16M
> : (or more) x 16 bits (or more), 10ns.
>
> : I can't afford the address-to-data-out latency of dynamic RAM.  There
are
> : ways around this, of course, but SRAM would be so much simpler.
>
> 4Mibit Devices are in full production (256kix16). I guess it will take
some
> time until  256MiBit are available.
>
> Bye
>
> -- 
> Uwe Bonnes                bon@elektron.ikp.physik.tu-darmstadt.de
>
> Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
> --------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------

at Thu, 08 Jan 2004 17:42:41 GMT in <lEgLb.1476$rt.397
@newssvr29.news.prodigy.com>, 0_0_0_0_@pacbell.net (Martin Euredjian) wrote 
:

>I'm trying to determine if anyone makes a large/fast static RAM part.  16M
>(or more) x 16 bits (or more), 10ns.
>
>I can't afford the address-to-data-out latency of dynamic RAM.  There are
>ways around this, of course, but SRAM would be so much simpler.
>
>Any ideas?
>
>Thanks,
>
>

The biggest async parts (the classic SRAM, super-simple interfacing) are 
the 16 Mbit parts from Cypress (CY7C1061AV33) and Toshiba (TC55V16100FT). 
Sync parts (much more complex interfacing, a bit of a PITA) are the 72 Mbit 
Cypress CY7C1482V33. Don't expect anything much larger, especially on the 
async parts, anytime soon. These aren't cheap, either, although you gain an 
incredible amount, especially with the asynchronous parts, without all the 
overhead associated with DRAM. Manufacturer interest will depend on your 
order size. How many are you looking to get? Millions? Or onesy-twosey? If 
the former, you may get Cypress' attention. If the latter, you'll no doubt 
have to be satisfied with what's available.
-- 
Alex Rast
ad.rast.7@nwnotlink.NOSPAM.com
(remove d., .7, not, and .NOSPAM to reply)

Alex Rast <ad.rast.7@nwnotlink.nospam.com> wrote:
...
: The biggest async parts (the classic SRAM, super-simple interfacing) are 
: the 16 Mbit parts from Cypress (CY7C1061AV33) and Toshiba (TC55V16100FT). 
: Sync parts (much more complex interfacing, a bit of a PITA) are the 72 Mbit 

At least the Cypress page doesn't sound like instant availability for the
16M asynchronous parts
-- 
Uwe Bonnes                bon@elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------

Let's remember that the original question was for 256 Mbits = 32 MBytes.
That's several generations of Moore's Law away.
If you figure six transistors per memory bit (plus decoding), that
device would be getting close to 2 Billion transistors. Even the largest
FPGAs have a factor 4 fewer tightly-packed transistors, and they command
a price of >$ 1000.

If you really need RANDOM access in 10 ns, this may be impossible today.
If there is some structure, predictability etc, then you might be able
to do it with DRAMs plus caching (???)
Peter Alfke
==========
Uwe Bonnes wrote:
> 
> Alex Rast <ad.rast.7@nwnotlink.nospam.com> wrote:
> ...
> : The biggest async parts (the classic SRAM, super-simple interfacing) are
> : the 16 Mbit parts from Cypress (CY7C1061AV33) and Toshiba (TC55V16100FT).
> : Sync parts (much more complex interfacing, a bit of a PITA) are the 72 Mbit
> 
> At least the Cypress page doesn't sound like instant availability for the
> 16M asynchronous parts
> --
> Uwe Bonnes                bon@elektron.ikp.physik.tu-darmstadt.de
> 
> Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
> --------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------

What's you quantity per year.

You could have 16 of the cypress sevices places on a PBC or even die
bonded into a module.  And that module may even have a market on it's
own.  THis is what the IC mfgs do when they are stepping up to a
larger size device.

gm

Lurking around I found 72Mbit parts.  These are MCM's, of course.
http://www.gsitechnology.com/72MbBurst.htm


-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Euredjian

To send private email:
0_0_0_0_@pacbell.net
where
"0_0_0_0_"  =  "martineu"




"Peter Alfke" <peter@xilinx.com> wrote in message
news:3FFDF8A2.A649E2FA@xilinx.com...
> Let's remember that the original question was for 256 Mbits = 32 MBytes.
> That's several generations of Moore's Law away.
> If you figure six transistors per memory bit (plus decoding), that
> device would be getting close to 2 Billion transistors. Even the largest
> FPGAs have a factor 4 fewer tightly-packed transistors, and they command
> a price of >$ 1000.
>
> If you really need RANDOM access in 10 ns, this may be impossible today.
> If there is some structure, predictability etc, then you might be able
> to do it with DRAMs plus caching (???)
> Peter Alfke
> ==========
> Uwe Bonnes wrote:
> >
> > Alex Rast <ad.rast.7@nwnotlink.nospam.com> wrote:
> > ...
> > : The biggest async parts (the classic SRAM, super-simple interfacing)
are
> > : the 16 Mbit parts from Cypress (CY7C1061AV33) and Toshiba
(TC55V16100FT).
> > : Sync parts (much more complex interfacing, a bit of a PITA) are the 72
Mbit
> >
> > At least the Cypress page doesn't sound like instant availability for
the
> > 16M asynchronous parts
> > --
> > Uwe Bonnes                bon@elektron.ikp.physik.tu-darmstadt.de
> >
> > Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
> > --------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------