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Appendix A Specifications for AT-MIO-16XE-50
AT-MIO/AI E Series User Manual A-30
National Instruments Corporation
Digital I/O
Number of channels ...........................8 input/output
Compatibility.....................................TTL/CMOS
Power-on state ...................................Input (High-Z)
Data transfers.....................................Programmed I/O
Timing I/O
Number of channels ...........................2 up/down counter/timers,
1 frequency scaler
Resolution
Counter/timers............................ 24 bits
Frequency scaler......................... 4 bits
Compatibility.....................................TTL/CMOS
Base clocks available
Counter/timers............................ 20 MHz, 100 kHz
Frequency scaler......................... 10 MHz, 100 kHz
Base clock accuracy...........................±0.01%
Max source frequency........................20 MHz
Min source pulse duration .................10 ns, edge-detect mode
Digital logic levels............
Level Min Max
Input low voltage
0 V 0.8 V
Input high voltage
2 V 5 V
Input low current
— -320 µA
Input high current
— 10 µA
Output low
voltage
(I
OL
= 24 mA)
— 0.4 V
Output high
voltage
(I
OH
= 13 mA)
4.35 V —