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NI 9401 Operating Instructions and Specifications 14 ni.com
Maximum input signal switching frequency by number of input
channels, per channel
8 input channels..........................9 MHz
4 input channels..........................16 MHz
2 input channels..........................30 MHz
Maximum output signal switching frequency by number of output
channels with an output load of 1 mA, 50 pF, per channel
8 output channels........................5 MHz
4 output channels........................10 MHz
2 output channels........................20 MHz
I/O propagation delay.......................100 ns max
I/O pulse width distortion.................10 ns typ
Input current (0 V ≤ V
in
≤ 4.5 V)......±250 μA typ
Input capacitance ..............................30 pF typ
Input rise/fall time.............................500 ns max
Overvoltage protection,
channel-to-COM...............................±30 V max on one channel at
a time; however, continued
use at this level will degrade
the life of the module.