Any INTERDESIGN / FERRANTI familiars in here?

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

Hey, at least you got to talk to Hans Camenzind.

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The parts are definately unique. I've sent you an email, I hope you don't mind. Thanks.

- Matt

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

Indeed.

I still have a fist-full in my parts bins.

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.

...Jim Thompson

Not evident at this end.

If bouncing, manually remove 'nospam.'

RL

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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

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.

In article , Matty-t writes

Hi Matt,

I believe the Ferranti semiconductor arm metamorphosed into

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.

Sort of like the US government buying GM ?:-)

...Jim Thompson