19 May
2005
19 May
'05
11:36 a.m.
Subject: Re: Datasheet or info for Fairchild uA3656D?
From: "Dwight K. Elvey" <dwight.elvey at amd.com>
Date: Thu, 19 May 2005 09:54:14 -0700 (PDT)
To: cctalk at classiccmp.org
My Databooks and drawings from when I was designing with the beastie
says with +5 Vcc and -9Vdd all IO will be TTL compatable.
FYI back in that time frame Signetics, Intel and Fairchild had a
DTL/TTL product in the 3xxx class numbering. For example:
3205 similar to 74138 may be differnt pinout
3009 similar to 7432
9602 onshot similar to 74123 however the 9602 was truly a better part.
3404 8bit wide latch maybe similar to 74100 or 74373
1101 256x1 Pmos (two voltages) and really slow (1.5us parts were the
fast ones)
There were others but those appear on my drawing and those of the
MCS-8.
The greatest part of that era, 2102 1kx1 1us (initial pricing $16 ea).
Allison
From: "Joe R." <rigdonj at
cfl.rr.com>
At 05:17 PM 5/18/05 -0700, Dwight wrote:
Hi Joe
My bad. The spec sheet shows that it will work with TTL.
The inputs can go to VDD but don't need to.
Dwight
Hi
There is a good chance it is an interface part.
Remember the 8008 bus is not TTL.
???? Ok then what is it? The first page in my Intel 8008 manual says
"TTL Compatible (Input, Output and Clocks)". Or am I missing something?
Joe