National Instruments 653X - Manual (Page 92)

© National Instruments Corporation A-1 653X User Manual
A
Specifications
This appendix lists features and specifications for your 653X devices and
the PCI/PXI-7030/6533 device. Specifications are typical at 25
°C unless
otherwise noted.
Digital I/O
Number of channels ............................... 32 input/output;
4 dedicated output and control;
4 dedicated input and status
Compatibility ......................................... TTL/CMOS (standard or
wired-OR)
Hysteresis ............................................... 500 mV
Digital logic levels
Level Min Max
Input low voltage 0 V 0.8 V
Input high voltage 2 V 5 V
Input low current for data lines
(V
in
= 0.4 V)
DPULL high
DPULL low
—
— –70
µA
–10
µA
Input high current for data lines
(V
in
= 2.4 V)
DPULL high
DPULL low —
— 10
µA
40
µA
Input low current for control lines
(V
in
= 0.4 V)
CPULL high
CPULL low —
— –2.5 mA
–200
µA