FJH was the Valvo prefix
http://www.elektron-bbs.de/elektronik/tabellen/ddr/digibiic.htm
Like some of the Siemens stuff it could be kinda special slow TTL
intended for noisy industrial or automotive environments.
Regards,
Sipke de Wal
----- Original Message -----
From: Ben Franchuk <bfranchuk_at_jetnet.ab.ca>
To: <classiccmp_at_classiccmp.org>
Sent: Monday, March 04, 2002 7:43 PM
Subject: Re: Weird 7410
> Tothwolf wrote:
> >
> > On Sun, 3 Mar 2002, William Donzelli wrote:
> >
> > > I have a weird TTL here - a brand I have never seen. It is marked
> > > FJH121/7410N witha 6920 datecode, and the logo is a diamond with an
> > > "A" inside. Japanese, perhaps? I have seen that logo before...
> > >
> > > Ideas?
> >
> > Fujitsu? Hitachi? A good cross reference book should show who made 'FJH'
> > parts. Somehow I doubt they were making 7400 series logic chips in 1969,
> > so the 6920 number must be an in-house date code of some sort.
>
> TTL came out in the 60's, but at BIG $$$ a chip they could only afford
> it for
> things like the space program that put man on the moon or large main
> frames.
>
> --
> Ben Franchuk - Dawn * 12/24 bit cpu *
> www.jetnet.ab.ca/users/bfranchuk/index.html
Received on Mon Mar 04 2002 - 17:34:25 GMT