Discontinued IC's: Fairchild (?) MB15604; FPGA?

From: Richard Erlacher <richard_at_idcomm.com>
Date: Tue Aug 1 23:04:54 2000

The use of the Fujitsu prefix MB suggests it's a standard-line part. If
you're still discussing those quad flat-packs, however, it's not likely it's
an EPROM because it would have too few pins to be even a smallish EPROM.
Moreover that's an inappropriate package for an EPROM that has to be
programmed, considering the handling equipment of the time when these
packages were in use. It is probably analog, or may even be some small
scratchpad ram or some such. With only 17 pins, it can't be much more than
a 1k-bit memory.

Both Fujitsu and Hitachi made an extensive array of high-speed memories for
mainframes and supercomputers. It could be that you have a really fast
16-bit ECL memory in a package that would make for a nice pair of cuff links
or a high-tech tie-tack. A look at their web site might not be a bad idea.

Dick

----- Original Message -----
From: Dwight Elvey <elvey_at_hal.com>
To: <classiccmp_at_classiccmp.org>
Sent: Tuesday, August 01, 2000 6:26 PM
Subject: Re[2]: Discontinued IC's: Fairchild (?) MB15604; FPGA?


> "Will Jennings" <xds_sigma7_at_hotmail.com> wrote:
> > Tony,
> > Yeah, I think it is something gross like a mask-rom or somethin, I used
to
> > have one of those chips and never could find any info.. neat package
though
> > (pga, has a shiny silver colored square in middle). Anyway, yes, the
logo is
> > for Fujitsu, and the MB prefix is also an indicatiton of it being a
Fujitsu
> > part. Fairchild's logo is more of an italicized F..
> >
>
> Hi
> working for a Fujitsu company, I can tell you that the
> F's with the bar are Fujitsu. Also, Fujitsu uses the MBxxxxx
> numbers for parts. As near as I can tell, the numbers have
> no meaning other than you can tell that one was assigned
> after the other. The part is most likely an ASIC since
> Fujitsu is a major foundary for a lot of people.
> Although I work for a Fujitsu company, I have no way to tell
> what any of their parts are unless it is one of the ones
> we design. I've looked for other part on the web without
> results. I'm sure someone knows, I just don't know who.
> Dwight
>
>
Received on Tue Aug 01 2000 - 23:04:54 BST