National Instruments NI 9401 - Page 16

NI 9401 Operating Instructions and Specifications | © National Instruments | 15
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
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