10-30-2008 04:11 AM
The PCI-6602 digital I/O lines have the following specifications:
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Hysteresis ............................................... 300 mV Schmitt triggers
Digital logic levels:
Level Min Max
Input low voltage –0.3 V 0.8 V
Input high voltage 2.0 V Supply +0.3 V
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How the 300mV hysteresis affects the maximum LOW voltage of 0.8V and the minimum HIGH voltage of 2.0V?
Alternatively, where the hysteresis threshold voltages are located?
Thanks.
Solved! Go to Solution.
10-30-2008 06:01 PM
Eyal,
My understanding is that from a logic high the Schmitt trigger will keep the signal high until the signal dips below at least 1.7 and above 1.1 for the corresponding .8V low logic level. So by that the thresholds would be located at both .8 and 2.0.