9 Sep
2015
9 Sep
'15
12:32 p.m.
On 2015-Sep-09, at 10:58 AM, Mike Stein wrote:
----- 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
There were at least 3 types in Fairchild's standard RTL series in 10-pin cans:
9915 - dual 3-in inverting gate
9926 - JK FF
9927 - quad inverter
which would cover logic requirements if the designer were attempting to keep type
diversity down.
A lot of Fairchild's standard DTL series was also available in 10-pin cans.
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.