©
National Instruments Corporation
A-1
Appendix
A
Specifications
This appendix lists the specifications of the DAQPad-6507/6508 devices.
These specifications are typical at 25° C, unless otherwise stated. The
operating temperature range is 0° to 70° C.
Digital I/O
Number of channels ............................... 96 I/O
Compatibility ......................................... TTL
Absolute max voltage rating .................. –0.5 to +5.5 V with respect
to GND
Handshaking........................................... Requires 1 port
Power-on state........................................ Configured as inputs, high
(selectable on the front panel
switch)
Data transfers ......................................... Interrupts, programmed I/O
Digital logic levels
Level
Min
Max
Input low voltage
Input high voltage
Input low current (V
in
= 0.8 V)
Input high current (V
in
= 2.4 V)
–0.3 V
2.2 V
—
—
0.8 V
5.3 V
–1.0 µA
1.0 µA
Output low voltage (I
out
= 2.5 mA)
Output high voltage (I
out
= -2.5 mA)
0 V
3.7 V
0.4 V
5.0 V
Input current (0 < V
in
< 5 V)
–1.0 µA
1.0 µA
