Nortek Vectrino - Specifications of Signal Levels

NORTEK VECTRINO VELOCIMETER
User Guide
39
Rev. C • 10.2004
Specifi cations of Signal Levels
The SyncIn input voltage must be between 0 V and 5.0 V. The SyncIn is a Schmitt
Trigger input with a pulldown resistor of 100kΩ to ground.
The input threshold values for the SyncIn are:
•
V
t+
input posi tive threshold, 2.2 V
• V
t–
input nega tive threshold, 0.9 V
For the SyncIn voltage to be
considered as high, it must
exceed 2.2 V. Similarly, it
must be 0.9 V or lower to be
considered as low.
5 V
2.2 V
0.9 V
0 V
High
Low
The output voltage levels for the SyncOut are:
•
V
oh
high level output voltage, min 2.5 V
• V
ol
low level out put voltage, max 0.45 V