National Instruments PC-DIO-24/PnP - page 28

Chapter 3 Signal Connections
© National Instruments Corporation 3-5 PC-DIO-24/PnP U ser Manual
Digital output specifications (referenced to GND):
Output logic high voltage 3.7 V min 5.0 V max
(Iol = –2.5 mA)
Output logic high voltage 2.7 V min 5.0 V max
(Ioh = –4 mA)
Output logic low voltage 0 V min 0.4 V
(Iol = 2.5 mA)
Output logic low voltage 0 V min 0.5 V
(Iol = 4 mA)
Figure 3-2 depicts signal connections for three typical digital I/O
applications.