Digital I/O; External Voltage - National Instruments USB-6008 User Manual And Specifications

Digital I/O

Input low voltage
Input high voltage
Input leakage current
Output low voltage (I = 8.5 mA)
Output high voltage
Push-pull, I = –8.5mA
Open-drain, I = –0.6mA, nominal
Open-drain, I = –8.5mA, with external pull-up resistor

External Voltage

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Slew rate................................................. 1 V/µs
Short circuit current ............................... 50 mA
Absolute accuracy (no load) .................. 7 mV typical, 36.4 mV maximum
Digital I/O
P0.<0..7>......................................... 8 lines
PI.<0..3> ......................................... 4 lines
Direction control .................................... Each channel individually
Output driver type
USB-6008 ....................................... Open-drain
USB-6009 ....................................... Each channel individually
Compatibility ......................................... TTL, LVTTL, CMOS
Absolute maximum voltage range ......... –0.5 to 5.8 V with respect to GND
Pull-up resistor ....................................... 4.7 kΩ to 5 V
Power-on state........................................ Input (high impedance)
Digital logic levels
Level
+5 V output (200 mA maximum) .......... +5 V typical, +4.85 V minimum
+2.5 V output (1 mA maximum) ........... +2.5 V typical
at full scale
programmable as input or output
programmable as push-pull or
open-drain
21 USB-6008/6009 User Guide and Specifications
Min Max
–0.3 0.8
2.0 5.8
— 50
— 0.8
2.0 3.5
2.0 5.0
2.0 —
Units
V
V
µA
V
V
V
V