Input capcitance of a PXI- 6551

[Oli_Wachno]

Hi,
 
does anybody know the value of the capacitance of an 6551 input pin (SHC68-C68-D2 Cable included?)? Seems, I'm (once again) to blind to find that value in the specs. :smileywink:
 
Thanks in advance!
 
Oliver

[Ryan M]

Oliver,

The raw cable dominates the system capacitance relative to the 6551 and
is ~30pF/foot so the 1m cable is ~120pf.  The channel electronics
will have a typical capacitive loading ~15pF.

On page 7 of the specifications, the rise and fall times of the 6551
are specified at 2.75ns with a total system loading of 475pF. 
This 475pF loading is 3x the capacitance of just the channel
electronics and cable.

[Oli_Wachno]

Hi Ryan,
 
thnak you very much for the informations!
 
Cheers
Oliver