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© 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 0V 0.8 V
Input high voltage 2V 5V
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