Data Translation DT9812 Series, User Manual

Page: 107 / 124

Specifications
107
Counter/Timer Specifications
Table 26 lists the counter/timer specifications for the DT9812, DT9813, and DT9814 Series
modules.
Table 26: Counter/Timer Specifications
Feature
DT9812 Series, DT9813 Series, DT9814 Series
Specifications
Number of counter/timers 1
Counter/timer modes Event counting,
frequency measurement, edge-to-edge
measurement,
rate generation
Resolution 32-bit
a
a. The resolution is 16-bits for rate generation operations.
Minimum pulse width:
(minimum amount of time it takes a
C/T to recognize an input pulse) 200 ns
Logic family TTL
Inputs
Input logic load:
High input voltage:
Low input voltage:
Low input current:
Level sensitive
1 TTL Load
2.4 V min
0.8 V max
–0.4 mA max
Outputs
High output:
Low output:
High output current (source):
Low output current (sink): 2.8 V min
0.6 V max
2 mA
12 mA
ESD protection (per spec)
Arc:
Contact: 8 kV
4 kV
Internal clock frequency 15 Hz to 12 MHz
External clock divider 2 to 65536