21 Oct
2016
21 Oct
'16
12:11 p.m.
On Oct 21, 2016, at 2:50 PM, Guy Sotomayor Jr <ggs
at shiresoft.com> wrote:
Found it. 1976 Peripherals Handbook, page 6-4. It specifies the driver output low
voltage at 70 mA sink, not 50...
paul
On Oct 21, 2016, at 11:41 AM, Paul Koning
<paulkoning at comcast.net> wrote:
They exist in various DEC handbooks. I don?t recall which one had them. On Oct 20, 2016, at 6:05 PM, Noel Chiappa <jnc
at mercury.lcs.mit.edu> wrote:
Where did you find those specs? I see a Unibus Spec on Bitsavers, but it doesn't
appear to mention the electrical specs.
From: David Bridgham
the right threshold voltage to meet the receiver
spec
The UNIBUS spec says the 4 crucial receiver parameters are input thresholds
(high and low), and the input currents (high and low); the crucial
transmitter parameters are the output low voltage (at 50 mA sink), and
the output high leakage current.