Data Translation DT9834 Series, User Manual

Page: 132 / 186

Appendix A
132
Digital I/O Specifications
Table 28 lists the specifications for the DIN/DOUT subsystems on the DT9834 Series modules.
Table 28: DIN/DOUT Subsystem Specifications
Feature Specifications
Number of digital I/O lines 32 (16 digital input, 16 digital output)
Number of ports 2 (16 bits each)
Number of dynamic digital output lines 1
Input termination Inputs tied to +3.3 V through 15 k
Ω
pull-up
resistors
Logic family LVTTL (+5 V tolerance)
Logic sense Positive true
Inputs
Input type:
Input logic load:
High input voltage:
Low input voltage:
Low input current: Level-sensitive
1 LVTTL
2.0 V minimum
0.8 V maximum
–0.4 mA maximum
Outputs
Fan out:
High output:
Low output:
High output current:
Low output current: 12 mA
2.0 V minimum
0.8 V maximum
–12 mA maximum
12 mA maximum
Interrupt on change Yes
Clocked with sample clock Yes
Software I/O selectable No