Network Card User Manual

Appendix A Specifications
DAQCard-1200 User Manual A-6 © National Instruments Corporation
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 µA)
(I
out
= –2.5 mA)
4.2 V
3.7 V
—
—
Output leakage current
0 ≤ V
out
≤ V
cc
–10 µA 10 µA
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 —