Measurement Computing miniLAB-1008 - Manual (Page 29)

miniLAB 1008 User's Guide Specifications
Digital input / output (screw terminal DIO3:0)
Parameter Conditions Specification
Digital type Discrete, 5V/TTL compatible
Number of I/O 4
Configuration 4 bits, independently programmable for
input or output.
Input high voltage 3.0 V min, 15.0 V absolute max
Input low voltage 0.8 V max
No load Vs - 0.4 V min, Vs typ Output voltage (Note 4)
1 mA load Vs - 1.5 V
Input leakage current ±1.0 µA
Output short-circuit current (Note 4) Output high 3.3 mA
Power-up / reset state Input mode (high impedance)
Note 4: The DIO[3:0] lines available at the screw terminals are protected with 1.5 KOhm series resistors.
Digital input / output (DB37)
Digital type 82C55
Number of I/O 24 (Port A0 through Port C7)
Configuration 2 banks of 8 and 2 banks of 4, or 3 banks of 8
Pull up/pull-down configuration All pins pulled up to Vs via 47K resistors (default). Positions available
for pull down to ground. Hardware selectable via zero ohm resistor.
Input high voltage 2.0 V min, 5.5 V absolute max
Input low voltage 0.8 V max, –0.5 V absolute min
Output high voltage (IOH = -2.5 mA) 3.0 V min
Output low voltage (IOL = 2.5 mA) 0.4 V max
External trigger
Parameter Conditions Specification
Trigger source External digital DIO[3:0], only DIO may be selected as a trigger input
Trigger mode Software selectable Level sensitive: user configurable for TTL level high or low input.
Trigger latency Burst 25 µs min, 50 µs max
Trigger pulse width Burst 40 µs min
Input high voltage 3.0 V min, 15.0 V absolute max
Input low voltage 0.8 V max
Input leakage current ±1.0 µA
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