Appendix A
Specifications
©
National Instruments Corporation
A-5
Digital I/O
Number of channels
NI PXI-7831R................................. 96 input/output
Compatibility ......................................... TTL
Digital logic levels
Maximum output current
Power-on state........................................ Programmable, by line
Data transfers ......................................... Interrupts, programmed I/O
Protection
Input ................................................ –0.5 to 7.0 V
Output ............................................. Short-circuit (up to eight lines
may be shorted at a time)
Reconfigurable FPGA
Number of logic slices ........................... 5, 120
Equivalent number of logic cells .... 11, 520
Available embedded RAM..................... 16, 384 KB
Timebase ................................................ 40 MHz
Level
Min
Max
Input low voltage (V
IL
)
Input high voltage (V
IH
)
0.0 V
2.0 V
0.8 V
5.5 V
Output low voltage (V
OL
),
where I
OUT
= –I
max
(sink)
Output high voltage (V
OH
),
where I
OUT
= I
max
(source)
—
2.4 V
0.4 V
—
Driver Type (Software Selectable)
I
max
(Source)
I
max
(Sink)
Default
5.4 mA
5.0 mA
Slow
1.9 mA
1.9 mA
Fast
16 mA
14 mA
