4 Sep
2011
4 Sep
'11
4:41 p.m.
On 09/04/2011 05:32 PM, Eric Smith wrote:
allison wrote about the DEC8837:
While thats true if DEC was not consuming them NS would have gotten out
of that part and its friends.
Allison
That is a DEC unique Open collector bus driver
with high current
outputs
and the input side has a Schmidt trigger input.
The usual source is
junk
boards. Its one of about 10 chips DEC develped
and used for bus
interfacing
for Omnibus, Unibus and Qbus and was ideally
suited for cable drivers
and peripheral IO.
DEC didn't develop it, National Semiconductor developed it, and sold
it as the DS8837.
DEC had them binned for slightly tighter receiver threshold and
leakage current specifications, so in principle a DS8837 might not
meet the DEC specifications for a DEC8837. In practice they almost
always did, as National Semiconductor was fairly conservative about
the specifications for the standard part.