9 Sep
2015
9 Sep
'15
10:58 a.m.
----- Original Message -----
From: "Paul Koning" <paulkoning at comcast.net>
To: "General Discussion: On-Topic and Off-Topic
Posts" <cctalk at classiccmp.org>
Sent: Wednesday, September 09, 2015 1:08 PM
Subject: Re: Control Data (?) circuit boards
On Sep 9, 2015, at 1:00 PM, Mike Stein
<mhs.stein at gmail.com> wrote:
Speaking of Control Data:
I have some boards out of (AFAIR) a Control Data
Display Controller (OSG 1253/1255), each
populated with ~30 10pin TO-5 ICs; they're
Fairchild with (house?) numbers such as 115,
116, 117, 118 and what I assume to be date codes
(all 3 digits, 7xx), e.g. F 115 728.
Any reason why I shouldn't scrap these (after
cutting off the gold fingers of course ;-) ?
I don't recognize 115 etc. as IC part numbers, but
728 or similar 7xx numbers sounds familiar for the
old RTL ICs that Fairchild produced in TO-5 cans.
I don't suppose there's a whole lot of demand for
that family, but then again I also suppose there
aren't a lot available.
paul
----- Reply -----
Yeah, RTL would be my guess considering the
package and the time frame (67/68), but AFAIK
Fairchild and Motorola used 700 and 900 (later
9000) numbers and these have 10 pins instead of
the usual 8 pins (although power is similarly
connected diagonally, i.e pins 5 and 10). Also odd
that the numbers are consecutive.
Anyway, just thought I'd mention them in case
someone has one of these displays or can use the
ICs.
m