What is the Voltage Threshold for my High Speed Digital I/O?

Updated Mar 10, 2018

Reported In

Hardware

  • PXIe-6535
  • PCIe-6535
  • PCIe-6535B
  • PXIe-6535B
  • PXIe-6536
  • PCIe-6536
  • PXIe-6536B
  • PCIe-6536B
  • PCIe-6537
  • PXIe-6537
  • PCIe-6537B
  • PXIe-6537B

Issue Details

When I set a specific logic level in my device, what is the voltage level 'break point' for high or low?

Solution

The voltage threshold is specified in each device manual or specifications sheet.

For example for the NI PXIe/PCIe-6535/6536/6537 and NI PCIe-6535B/6536B/6537B the Voltage Thresholds for a Voltage Level of 2.5 V are:

0.75 V - Low Voltage Thresholds (Maximum)
1.75 V - High Voltage Threshold (Minimum)

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