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© National Instruments Corp. 13 NI 9401 Operating Instructions and Specifications
Digital logic levels
Input
Voltage .................................5.25 V max
High, V
IH
..............................2 V min
Low, V
IL
...............................0.8 V max
Output
High, V
OH
.............................5.25 V max
Sourcing 100 μA ...........4.7 V min
Sourcing 2 mA...............4.3 V min
Low, V
OL
Sinking 100 μA .............0.1 V max
Sinking 2 mA.................0.4 V max