4 Mar
2002
4 Mar
'02
9:34 a.m.
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(a)jetnet.ab.ca>
To: <classiccmp(a)classiccmp.org>
Sent: Monday, March 04, 2002 7:43 PM
Subject: Re: Weird 7410
Tothwolf wrote:
On Sun, 3 Mar 2002, William Donzelli wrote:
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 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.