SLLA635 May   2024 THVD4411 , THVD4421 , THVD4431

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 Application Use-Case of Multiprotocol Transceivers
  6. 3 Key Design Goals of a Versatile Multiprotocol Transceiver
  7. 4 Discrete Multiprotocol Transceiver Implementation
  8. 5 TI's THVD44xx Multiprotocol Transceiver Family
  9. 6 MODE Configurations for THVD4431
  10. 7 Application Diagrams for THVD4431
  11. 8 Waveforms for THVD4431
  12. 9 Benefits of THVD4431 Over Competition Devices
  13. 10Conclusion

Abstract

RS-232 and RS-422/RS-485 wired interfaces have been popular in industrial applications because of the simplicity, low cost and robustness offered by them. Applications such as industrial and factory automation, industrial PCs (also known as single board computers), barcode scanners, point-of-sale terminals, building security systems and industrial transport use one or both of these interfaces.

Multiprotocol (MP) transceivers integrate RS-232, RS-422 and RS-485 into one chip and offer flexible configuration options for the user. Multiprotocol transceivers can be used as standalone RS-232 or RS-422 or RS-485 transceiver by allowing seamless switching between either interface based on control pins. MP transceivers usually combine charge pump for RS-232 signaling and termination resistor for RS-232 receiver (5kΩ) and for RS-422/RS-485 (120Ω), making the overall system compact and eliminating costly and space-consuming external circuitry.

Texas Instruments THVD44xx family of multiprotocol transceivers offer an unprecedented level of integration and flexibility. This paper describes multiprotocol transceivers and compares them to the discrete implementation. Article then describes in detail the THVD44xx devices by diving into the operational modes and waveforms. The paper concludes by showcasing benefits THVD44xx devices offer compared to available devices in the market.