Altair parts substitutions

From: Dwight Elvey <elvey_at_hal.com>
Date: Wed May 24 22:05:14 2000

Eric Smith <eric_at_brouhaha.com> wrote:
> "Richard Erlacher" <richard_at_idcomm.com> wrote:
> > I didn't realize that Intel made any 2508's.
>
> I don't think they did. That was TI's part number for the 5V 1K*8 EPROM.
>
> Intel's 5V 1K*8 part was the 2758. Other posts have claimed that an Intel
> 2758 is a half-bad 2716, but my fuzzy recollection from that era was that
> the ones I looked at had substantially different die sizes.

Hi
 I don't think that die size meant much. I was working for
Intel at the time these came out ( not in memory department )
and they were making die size changes on regular basis.
It seemed like every 3 or 4 months, we'd look into the windows
and see a smaller die for the same labled part. They may
have made a 1Kx8 part but I never saw one. The ones I saw
were always 2716 chips. I think later on, they were not
even separating out the half bad parts, they were just
using good die from the 2716 line because of the extra
cost of handling and the higher yield. I think you'll still
find that the extra address line was to be tied to one level
even though they didn't have the Hi/Lo select that the
earlier ones did.
Dwight
Received on Wed May 24 2000 - 22:05:14 BST