Logic families are groups of logic circuits with standardized voltage levels that constitute a valid logic state. All circuits within a logic family are compatible with other circuits within that family, because they share the same characteristics.

Logic families are defined by the following characteristics:

  • Single-ended voltage levels, such as the following logic families:
    • 1.2 V
    • 1.5 V
    • 1.8 V
    • 2.5 V
    • 3.3 V
    • 5.0 V
  • Differential voltage levels, such as the following:
    • Low-voltage emitter-coupled logic (LVPECL)
    • Low-voltage differential signaling (LVDS)

Refer to Configuring Voltage Levels for more information about using NI-HSDIO to select logic families and configure your voltage levels.

Note If you use the PXI 655x devices, you can configure custom voltage levels for your operation.