Appendix A
Specifications
DAQCard-1200 User Manual
A-6
ni.com
Digital logic levels
Protection................................................–0.5 to 5.5 V powered on,
±0.5 V powered off
Handshaking ...........................................3 wire, 2 port
Data transfers ..........................................Interrupts, programmed I/O
Timing I/O
Number of channels................................3 counters/timers
Digital logic levels
Level
Min
Max
Input low voltage
–0.3 V
0.8 V
Input high voltage
2.2 V
5.3 V
Output low voltage
(I
out
= 2.5 mA)
—
0.4 V
Output high voltage
(I
out
= –40
µ
A)
(I
out
= –2.5 mA)
4.2 V
3.7 V
—
—
Output leakage current
0
≤
V
out
≤
V
cc
–10
µ
A
10
µ
A
Level
Min
Max
Input low voltage
–0.3 V
0.8 V
Input high voltage
2.2 V
5.3 V
Output low voltage
(I
out
= 4 mA)
—
0.45 V
Output high voltage
(I
out
= –1 mA)
3.7 V
—
