![background image](http://html1.mh-extra.com/html/national-instruments/pci-6509/pci-6509_user-manual_3598847022.webp)
22
|
ni.com
|
PCI/PXI/PCIe-6509 User Guide and Specifications
Digital Logic Levels (PCI/PXI-6509)
Input Signals
The maximum input logic high and output logic high voltages assume a Vcc supply voltage of
5.0 V. Given a Vcc supply voltage of 5.0 V, the absolute maximum voltage rating for each I/O
line is –0.5 V to 5.5 V with respect to GND.
Output Signals (Vcc = 5 V)
The total current sinking/sourcing from one port cannot exceed 100 mA.
With a load, use the following equation to determine the power consumption on a 5 V rail. In the
equation,
j
is the number of channels you are using to source current.
Digital Logic Levels (PCIe-6509)
Input Signals
Level
Minimum
Maximum
Input voltage (V
in
)
0 V
Vcc
Input logic high voltage (V
IH
)
2 V
—
Input logic low voltage (V
IL
)
—
0.8 V
Level
Minimum
Maximum
High-level output current (I
OH
)
—
–24 mA
Low-level output current (I
OL
)
—
24 mA
Output voltage (V
out
)
0 V
Vcc
Output high voltage (V
OH
), at –24 mA
3.7 V
—
Output low voltage (V
OL
), at 24 mA
—
0.55 V
Level
Minimum
Maximum
Input voltage (V
in
)
0 V
5 V
Positive-going threshold (VT+)
—
2.2 V
250 mA
i
1
=
j
current sourced on channel
i
+