SLVAFN4 October   2023 TCA9509 , TCA9517A

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Contrasting Setups of SVO Buffers
  6. 3Important Considerations When Using TCA9509
  7. 4Summary
  8. 5References

1 Introduction

With the intention of being compliant with the I2C standard for maximum capacitance, I2C buffers or repeaters can be used to separate the parasitic capacitances associated at the inputs and outputs. Some I2C buffers such as the TCA9517, TCA9617A/B, and TCA9509 devices introduce a static voltage offset on one side of the device. A common design mistake is placing two I2C buffers with the SVO side facing each other. This application note takes a deeper look into this violation, the repercussions of not addressing this design mistake, and how to resolve this violation using the TCA9509.