National Instruments PC-DIO-24, User Manual

Page: 47 / 75

© National Instruments Corporation A-1 PC-DIO-24 User Manual
Appendix A
Specifications
This appendix lists the specifications for the PC-DIO-24 board. 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 .................................................... 24 I/O
Compatibility .............................................................. TTL
Absolute max voltage input rating .............................. -0.5 to +5.5 V with respect to GND
Handshaking ................................................................ Requires 1 port
Power-on state ............................................................. Configured as inputs
Data transfers .............................................................. Interrupts, programmed I/O
Digital Logic Levels
Input Signals
Odd-numbered pins 1–47......................................... Level
Min Max
Input logic high voltage 2.2 V 5.3 V
Input logic low voltage -0.3 V 0.8 V
Input current
(0 < Vin < 5 V)
-1.0
µ
A 1.0
µ
A
Output Signals
Pin 49 (at +5 V) ........................................................... 0.25 A max
Odd-numbered pins 1–47......................................... Level Min Max
Output high voltage
(Iout = -2.5 mA) 3.7 V 5.0 V
Output low voltage
(Iout = 2.5 mA) 0.0 V 0.4 V
Output current
(V
OL
= 0.5 V) 4 mA —
Output current
(V
OH
= 2.7 V) 4 mA —
Environment
Operating Temperature ............................................... 0
°
to 70
°
C
Storage Temperature ................................................... -55
°
to 150
°
C
Relative humidity ........................................................ 5% to 90% noncondensing