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[FAQ] How can I mitigate TXB / TXS oscillation concerns?

FAQ: Logic and Voltage Translation >  Auto-Bidirectional Level-Shifters  >> Current FAQ

To mitigate oscillation concerns with devices with edge rate accelerators / one-shots such as TXB / TXS devices, consider below:

  • Short enough traces for round-trip delay reflections within the one-shot duration of 10-30 ns. See data sheets.
  • Tolerances of any additional RC components, similar to the data sheet recommendations
  • Utilizing fast enough input edges per the input transition rate 
  • < 70 pF lumped capacitive loading. This includes additional parasitic capacitance from long trace lengths and connectors. 
  • Minimizing reflections with series dampening resistors on the outputs. See [FAQ] Can I estimate appropriate dampening resistor value for level-shifter outputs?

For more information see Do’s and Don’ts for TXB and TXS Voltage Level-Shifters with Edge Rate Accelerators.