24 May
2000
24 May
'00
11:29 a.m.
On Wed, 24 May 2000, Richard Erlacher wrote:
Are you sure about that, Allison? I recall popping
the lid off a
ceramic-packaged Intel labelled 28-pin logic device back in the '70's and
finding it housed a die clearly marked NS (under a microscope). In another
case, it was a PROM and clearly marked with Signetics' logo on the die.
Yes, and so? It conforms with what I said. Now was that 28 pin device
one of those listed?
Also Nec made MOS devices for intel Namely 8274 and 8272 as well.
Allison
Dick
----- Original Message -----
From: <allisonp(a)world.std.com>
To: <classiccmp(a)classiccmp.org>
Sent: Wednesday, May 24, 2000 6:39 AM
Subject: Re: Re[2]: Altair parts substitutions
> (pre-Columbian) data book. IIRC Intel
really didn't make any of its TTL
> parts, as their fab was dedicated to PMOS, NMOS, and later, CMOS
devices.
> Therefore I'd suspect that the i8205
(and also the i3205) were strictly
TTL,
> or, more correctly, schottky TTL. The
i8205, by the way, sinks only 10
mA
> as opposed to the schottky equivalent, the
'S138, which sinks somewhere
> between 16 and 24 mA, depending on whose databook of that day you
consult.
This was
probably more specsmanship than technology, however.
My intel data book set for the 1974-1981 window is fairly complete and the
I8205 has the exact same specs ans the TI LS138. Intel did have bipolar
fab back then and parts they did there included things like 3212, 300x,
8216/8126, 8224, 8228/38, an assortment of Bipolar PROMs and later part
like 8282, 8283, 8219, 8284, 8284A and others. Their capability is limted
so they did farm out stuff (under license) to TI and AMD.
Allison