Where you buy TC554001 ? Cost ? Datasheets ?

Thanks

Hugo J. M|ller
H.J.M. Hardware & Software Diseqos Electrsnicos
San Nicolas 683
Tel-Fax : 54-(0)-343-424-5953
(3100) Parana (Entre Rmos) Argentina
Email : hmuller [ANTISPAM-QUITAR-ESTO] @arnet.com.ar
Web Site: http://www.pagina.de/hjm
UIN (ICQ) : 38.605.074

----- Original Message -----
From: Octavio Nogueira <nogueira@AJATO.COM.BR>
To: <PICLIST@mitvma.mit.edu>
Sent: Monday, June 05, 2000 7:02 AM
Subject: Re: [PIC]: External SRAM on PIC (or AVR)


> Is sequential access is ok, I'm using a Toshiba
> TC554001 512K SRAM and two 74HC4040 counters. They work
> great!
>
> Friendly Regards
>
> Octavio Nogueira
> ===================================================
> nogueira@propic2.com                  ICQ# 19841898
> ProPic tools - low cost PIC programmer and emulator
> http://www.propic2.com
> ===================================================
>
> ----- Original Message -----
> From: Mark Willis <mwillis@FOXINTERNET.NET>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Monday, June 05, 2000 5:48 AM
> Subject: Re: [PIC]: External SRAM on PIC (or AVR)
>
>
> > Of all things, the palmtop I use a lot uses DRAM as it's main RAM - I
> > was CONVINCED this was SRAM, but it's not.  1/2Mb per chip, and I have 2
> > (1 Mb) pairs sitting here waiting for a future project.  These're
> > Hitachi RAM, set in TSOP Left & Right sets (reversed pinout for one -
> > you can Bus the tri-state pins this way) - Interesting stuff.  So I now
> > know that it's quite possible, WITH the right RAM, to go decently low
> > power (2 weeks off 2 1300mAh NiMH batt's with the rest of the machine
> > running off the same batteries) - Sorta shocked ME!  If I keep upgrading
> > these machines, someone could talk me out of a pair, certainly you could
> > talk me out of part numbers (KM416V256ALLTR is the reversed one) - I can
> > find the other number if you cannot get there from here <G>
> >
> > I have some info I can dig out that may show how they handle the refresh
> > process, too.
> >
> >   Mark
> >
> > Harold Hallikainen wrote:
> > >         There have been lots of discussions about serial SRAM on the
> list over
> > > the years. As far as I can tell, there aren't any of any significant
> size
> > > out there. I WAS using the Dallas RamPort (DS1380 and DS1381) 'til
they
> > > discontinued them on us...  I'm now moving designs over the the
> PIC18c452
> > > which has enough RAM for several products. On one product I'm using
the
> > > 18c452 with several latches to drive a 128kbyte SRAM (capacitor
backed).
> > > That takes several chips. Seems like SOMEONE would make a reasonably
> > > large serial SRAM, but that doesn't seem to be the case.
> > >
> > > Harold
> > >
> > > On Fri, 2 Jun 2000 09:11:59 +0200 TOM THERON <mmsesys@ICON.CO.ZA>
> writes:
> > > > PCF8570 from Philips,  256 x 8,  i2c interface.
> > > >
> > > > Tom
> > > >
> > > > ----- Original Message -----
> > > > From: Bob Ammerman
> > > > To: PICLIST@MITVMA.MIT.EDU
> > > > Sent: Friday, June 02, 2000 4:18 AM
> > > > Subject: [PIC]: External SRAM on PIC (or AVR)
> > > >
> > > >
> > > > Just a dumb question: Serial RAM? I've heard of search EEPROM and
> > > > serial
> > > > FLASH. I have had a couple applications where serial RAM would have
> > > > been a
> > > > godsend. Does anybody make this? What capicity?
> > > >
> > > > Thanks,
> > > >
> > > > Bob Ammerman
> > > > RAm Systems
> > > > (high function, high performance, low level software)
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: Bennett, Matt <Matt.Bennett@ANDREW.COM>
> > > > To: <PICLIST@MITVMA.MIT.EDU>
> > > > Sent: Thursday, June 01, 2000 11:38 AM
> > > > Subject: [PIC]: External SRAM on PIC (or AVR)
> > > >
> > > >
> > > > > If you've used the external SRAM (as in STATIC, not serial) on a
> > > > PIC or
> > > > AVR-
> > > > > which SRAM did you use?  I'm having problems finding a 64Kx8 part
> > > > that is
> > > > > pin compatible (without gates other than an address latch) and is
> > > > in stock
> > > > > somewhere.  I could go to a 2 32K SRAMs, but I'd rather not.
> > > > >
> > > > > The PIC (17C) uses an ALE, /OE, /WR scheme, and the AVR uses an
> > > > ALE, /RD,
> > > > > /WR scheme.  The PIC appears compatible with the 61XXX family of
> > > > SRAMs
> > > > (64Ks
> > > > > are currently being made of Unobtanium [Un]), but in my brief
> > > > search, I
> > > > > haven't found any that are directly compatible with the AVR's
> > > > scheme.
> > > > > Serial RAMs are not an option, due to speed issues.
> > > > >
> > > > > Matt Bennett
> > >
> > > ________________________________________________________________
> > > YOU'RE PAYING TOO MUCH FOR THE INTERNET!
> > > Juno now offers FREE Internet Access!
> > > Try it today - there's no risk!  For your FREE software, visit:
> > > http://dl.www.juno.com/get/tagj.
> >
> > --
> > I re-ship for small US & overseas businesses, world-wide.
> > (For private individuals at cost; ask.)
>