Digital I/O Signal Connections - National Instruments PC-DIO-96/PnP User Manual

Digital I/O Signal Connections

© National Instruments Corporation
Pins 1 through 48 and pins 51 through 98 of the I/O connector are digital
I/O signal pins. The following specifications and ratings apply to the
digital I/O lines.
Absolute maximum voltage rating -0.5 to +5.5 V with respect to GND
Digital input specifications (referenced to GND):
Input logic high voltage
Input logic low voltage
Maximum input current
(0 < V in < 5 V)
Digital output specifications (referenced to GND):
Output logic high voltage
at I out = -2.5 mA
Output logic low voltage
at I ou t = 2.5 mA
Output current
at V = 0.5 V
OL
Output current
at V = 2.7 V
OH
Figure 3-4 depicts signal connections for three typical digital I/O
applications.
2.2 V min
-0.3 V min
-1.0 µA min
3.7 V min
0.0 V min
2.5 mA min
2.5 mA min
3-7
Chapter 3 Signal Connections
5.3 V max
0.8 V max
1.0 µA max
5.0 V max
0.4 V max
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PC-DIO-96/PnP User Manual