4 Sep
2011
4 Sep
'11
2:32 p.m.
allison wrote about the DEC8837:
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.