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Specifications
Digital I/O
Digital Logic Levels
© National Instruments Corporation
This appendix lists the specifications for the PC-DIO-24/PnP board.
These specifications are typical at 25° C, unless otherwise stated. The
operating temperature range is 0° to 70° C.
Number of channels ............................24 I/O
Compatibility ......................................TTL
Absolute max voltage input rating
(Vcc = 5.0 V) ......................................–0.5 to +5.5 V with
Handshaking .......................................Requires one port
Power-on state ....................................Configured as inputs, pulled
Data transfers......................................Interrupts, programmed I/O
Input Signals
The maximum input logic high and output logic high voltages assume a
Vcc supply voltage of 5.0 V.
Level
Input logic high voltage
Input logic low voltage
Input high current
(V
= 5 V, W1 set to pullup)
in
respect to GND
high or low (jumper-selectable)
A-1
Appendix
A
Min
Max
2.2 V
5.3 V
–0.3 V
0.8 V
—
11.0 A
PC-DIO-24/PnP User Manual
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