Half-Duplex, Non-Isolated RS-485 BoosterPack Reference Design
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Key Document


The Half-Duplex, Non-Isolated RS-485 BoosterPack allows for easy evaluation of TI’s RS-485 transceivers for applications such as building management systems (BMS), factory automation, building automation, and HVAC. The BoosterPack is designed and tested to support data rates up to 1.25 Mbps for cable lengths up to 1000 feet and a total of 32 nodes. The populated extended common-mode RS-485 transceiver can be easily removed and replaced with any TI half-duplex, 8-pin SOIC RS-485 transceiver. This allows the system designer to evaluate many different transceivers with varying performance targets. The RS-485 BoosterPack is compatible with 20-pin and 40-pin TI LaunchPads.

  • Supports 1.25 Mbps data rates with cable lengths up to 1000 feet and a total of 32 nodes
  • Multiple configuration options: on-board or external power source, external data stimulus and monitoring, common-mode voltage injection, configurable failsafe and bus termination loading
  • Performance targets verified through a live test
  • Compatible with 20-pin or 40-pin TI LaunchPad
  • IEC 61000-4-2 (Electro Static Discharge) up to 15 KV
  • IEC 61000-4-4 (Electrical Fast Transients) up to 2 kV
  • IEC 61000-4-5 (Surge) from 500 to 1000 V

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Schematic/Block Diagram

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
SN65HVD24  Extended Common-mode RS-485 Transceiver  Interface  Sample & Buy View Design Kits & Evaluation Modules
TPS61220  0.7-VIN, adjustable output voltage boost converter with 5.5-μA quiescent current  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
SN65HVD24 Download Download
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TPS61220 Download Download

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Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guide (1)
Title Type Size (KB) Date
PDF 2841 10 Jun 2014
Design files (6)
Title Type Size (KB) Date
ZIP 335 02 Jul 2014
ZIP 736 02 Jul 2014
PDF 1198 02 Jul 2014
PDF 297 02 Jul 2014
PDF 84 02 Jul 2014
PDF 123 02 Jul 2014
More literature (1)
Title Type Size (KB) Date
ZIP 3887 30 Jun 2014

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