Counter/Timer Specifications - Measurement Computing Data Translation DT3034 User Manual

Appendix A

Counter/Timer Specifications

Table 26
Number of counter/timers
Clock Inputs
Gate Inputs
Counter Outputs
148
lists the specifications for the C/T subsystems on the DT3034 boards.
Table 26: C/T Subsystem Specifications
Feature
Input type:
Input load:
High-level input voltage:
Low-level input voltage:
Hysteresis:
High-level input current:
Low-level input current:
Minimum pulse width:
Maximum frequency:
Termination:
Input type:
Input load:
High-level input voltage:
Low-level input voltage:
Hysteresis:
High-level input current:
Low-level input current:
Minimum pulse width:
Maximum frequency:
Termination:
Output driver:
Output driver high voltage:
Output driver low voltage:
Termination:
Specifications
4
Schmitt trigger, rising-edge sensitive
1 HCT14 (TTL)
2.0 V minimum
0.8 V maximum
0.4 V (minimum); 1.5 V (maximum)
1.0 A
1.0 A
–
100 ns (high); 100 ns (low)
5.0 MHz
33 series resistor
Schmitt trigger, level sensitive
1 HCT14 (TTL)
2.0 V minimum
0.8 V maximum
0.4 V (minimum); 1.5 V (maximum)
1.0 A
1.0 A
–
100 ns (high); 100 ns (low)
5.0 MHz
33 series resistor
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)
33 series resistor