Any INTERDESIGN / FERRANTI familiars in here?
Matty-t
I have two obsolete parts I am trying to source any info I can on
(datasheets prefered).
One is INTERDESIGN 2741-01 datecode 51st week of 1980
Other is INTERDESIGN 2755a-01 datecode 1st week of 1983
They are 18 pin proprietary parts. I am trying to engineer a
replacement for them as a hobby project. I briefly spoke with Hans
Camenzind and he said he sold Interdesign to Ferranti in 1977. Both
parts were engineered 1980 or prior because they both went into the
same device circa that time but he does not recall these parts. So
Sometime between 1977 and 1980 I suppose. I have dug for days on end
and keep hitting brick walls. Any familiars out there? perhaps a
databook from that era that showcases these parts? ANything you could
offer would be great. Thanks!
- Matt
legg
If you're trying to replace these parts in working gear, you'd be
better off studying the circuit in which they are used and figure out
a way of doing the same job, using currently familiar parts.
What is it you're trying to revive, and what makes you think these
integrated circuits are kaput?
The ony non-proprietary output from Ferranti Interdesign that I'm
aware of would have been breadboarding components.
MO-0xx - 20V bipolar process parts
MO-1xx - 35V bipolar process parts
MO-4xx - analog cmos process parts
You must realise that one of the main incentives for using a
'monochip' in a design was to prevent simple cicuit duplication by
part number. The part number and pin count won't even be an indication
of the basal chip size employed, although it sets some limits.
A custom device's main purpose was often to perform a dedicated
function with a minimal part count, when commodity devices were
unavailable to do so. A lot has changed in available device function
and availability since the early 80s.
RL
mi...@sushi.com
Hey, at least you got to talk to Hans Camenzind.
Matty-t
>
> - Show quoted text -
The parts are definately unique. I've sent you an email, I hope you
don't mind. Thanks.
- Matt
Matty-t
>
> - Show quoted text -
It was a very brief conversation. I will say considering his time
value that his reply was not obligated and I'm thankful he took the
time to do so. Hans does still dedicate his time to the art, still
does contracted design, produced a book that you can download for free
as opposed to paying for it, and even has a youtube channel! So
considering all that I was pleased that he found some extra time to
entertain my inquiry.
- Matt
Jim Thompson
>>On Sun, 26 Apr 2009 17:19:10 -0700 (PDT), Matty-t <msp...@gmail.com> wrote:
>
>>Hey guys!
>>
>> I have two obsolete parts I am trying to source any info I can on
>>(datasheets prefered).
>>
>> One is INTERDESIGN 2741-01 datecode 51st week of 1980
>>
>> Other is INTERDESIGN 2755a-01 datecode 1st week of 1983
>>
>> They are 18 pin proprietary parts. I am trying to engineer a
>>replacement for them as a hobby project. I briefly spoke with Hans
>>Camenzind and he said he sold Interdesign to Ferranti in 1977. Both
>>parts were engineered 1980 or prior because they both went into the
>>same device circa that time but he does not recall these parts. So
>>Sometime between 1977 and 1980 I suppose. I have dug for days on end
>>and keep hitting brick walls. Any familiars out there? perhaps a
>>databook from that era that showcases these parts? ANything you could
>>offer would be great. Thanks!
>>
>
>If you're trying to replace these parts in working gear, you'd be
>better off studying the circuit in which they are used and figure out
>a way of doing the same job, using currently familiar parts.
Indeed.
>
>What is it you're trying to revive, and what makes you think these
>integrated circuits are kaput?
>
>The ony non-proprietary output from Ferranti Interdesign that I'm
>aware of would have been breadboarding components.
>
>MO-0xx - 20V bipolar process parts
>MO-1xx - 35V bipolar process parts
>MO-4xx - analog cmos process parts
I still have a fist-full in my parts bins.
>
>You must realise that one of the main incentives for using a
>'monochip' in a design was to prevent simple cicuit duplication by
>part number. The part number and pin count won't even be an indication
>of the basal chip size employed, although it sets some limits.
There were some fairly large arrays, like a few hundred transistors,
which then had a custom metal layer.
So finding data may be near impossible.
>
>A custom device's main purpose was often to perform a dedicated
>function with a minimal part count, when commodity devices were
>unavailable to do so. A lot has changed in available device function
>and availability since the early 80s.
>
>RL
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine Sometimes I even put it in the food
legg
<snip>
>
> I've sent you an email
<snip>
Not evident at this end.
If bouncing, manually remove 'nospam.'
RL
Matty-t
> >On Mon, 27 Apr 2009 06:27:31 -0700 (PDT), Matty-t <mspy...@gmail.com> wrote:
>
> <snip>
>
>
>
> > I've sent you an email
>
> <snip>
>
> Not evident at this end.
>
> If bouncing, manually remove 'nospam.'
>
> RL
Hi, My mistake. I sent another email and CC'd to Jim.. I hope he
doesn't mind. Thank you for anything you can contribute.
- Matt
mi...@sushi.com
Yeah, I got the free book, but his being on youtube is new to me. I'm
sure he enjoyed the money he got selling the company, but the sleaze
that went on after he left must have made him glad he didn't name the
company after himself.
Feranti hired two Exar employees with the notion of stealing Exar
business. What they didn't realize was that ethic glue is stronger
than money, and these guys came back to Exar with Interdesign
customers for the Flexar gate array.
Nemo
<a89ad0e8-88e8-485d...@y34g2000prb.googlegroups.com>,
Matty-t <msp...@gmail.com> writes
Hi Matt,
I believe the Ferranti semiconductor arm metamorphosed into
www.zetex.com - you might try rooting around their website. Ah, they
appear to have been taken over (again) and are now part of Diodes, Inc.
Wikipedia has an article on Ferranti describing what happened to the
various bits after the company collapsed when it bought a crooked
American company, ISC.
--
Nemo
Jim Thompson
Sort of like the US government buying GM ?:-)