SLLA639 May   2024 THVD1419 , THVD1429 , THVD1439 , THVD1449 , THVD2419 , THVD2429

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Discrete Approach to RS-485 Surge Protection
  6. 3Integrated Surge Protection and the THVD14x9 Family of Devices
  7. 4THVD24x9x – The Next Generation of Integrated Surge Protected RS-485 Devices from TI
  8. 5Summary
  9. 6References

Abstract

When dealing with surge transients within RS-485 systems most designers have to work with some type of protection circuitry, whether it be discrete (most common) or integrated within the transceiver itself. This protection circuitry is paramount to adding a layer of robustness to the system design to survive harsh operating conditions and/or high voltage transients. Not only does the protection need to be able shunt a large amount of current towards the system ground, but also maintain a voltage level within the absolute maximum and minimum ratings of the transceiver. RS-485 devices integrated with surge protection like the new THVD2419 and THVD2429 from TI's new high stand off voltage surge protected THVD24x9x family or the classic surge protected THVD14x9 family offers multiple simpler solutions for implementing surge protected RS-485.