RE: mos 6529B datasheet ?

From: Bil Herd <>
Date: Sat, 24 Mar 2012 22:18:51 -0400
Message-ID: <>
No I did not know of it being used anywhere else.  It was that simplicity
that made me extremely happy since it fit in a .3" dip pack instead of
something relatively huge (.6") and also not needing separate I/O
direction registers, etc.  Imagine how happy I was when I went  to the
cabinet and pulled a part that did exactly what was needed (and pretty
much nothing more).

The fact it was our own chip also meant we didn't have to worry about
availability  as there was a huge LS shortage at the time and parts prices
were consequently high.

-----Original Message-----
[] On Behalf Of Gerrit Heitsch
Sent: Friday, March 23, 2012 1:14 PM
Subject: Re: mos 6529B datasheet ?

On 03/22/2012 03:31 PM, Bil Herd wrote:
> It's bi -directional - read and write, and it's "soft" nmos outputs
> are better for RFI emissions and withstanding it's outputs indirectly
> shorted together which is why I picked it for the TED/+4

Do you know if it was ever used anywhere else but in the 264 series?

It's also me most minimal I/O-chip I know of, doesn't even have a reset


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Received on 2012-03-25 03:00:13

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