Digital I/O Specifications - Measurement Computing Data Translation DT3034 User Manual

Digital I/O Specifications

Table 25 lists the specifications for the DIN/DOUT subsystems on the DT3034 boards.
Number of lines
Number of ports
Termination
Inputs
Input type:
Input load:
High-level input voltage:
Low-level input voltage:
High-level input current:
Low-level input current:
Outputs
Output driver:
Output driver high voltage:
Output driver low voltage:
Table 25: DIN/DOUT Subsystem Specifications
Feature Specifications
16 (bidirectional)
2 (8 bits each)
47 k resistor pullup to +3.3 V;
33 series resistor
Level sensitive
1 TTL, 1 TTL
2.0 V minimum
0.8 V maximum
20 A
0.2 mA
TTL
–
2.0 V minimum (IOH = 15 mA);
–
2.4 V minimum (IOH = 3 mA)
0.5 V maximum (IOL = 24 mA);
0.4 V maximum (IOL = 12 mA)
Specifications
147