Isolated Profibus Interface Reference Design
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This reference design provides an isolated, 40-Mbps, 3.3-V to 5-V Profibus interface using the ISO1176T, isolated Profibus transceiver and the TPS76350 high-accuracy linear regulator. This circuit achieves signal and power isolation and at the same time decreases board space and power consumption.

  • 4000V peak isolation, 560V peak VIORM
  • Signaling rates up to 40Mbps
  • Differential output exceeds 2.1V (54 Ohm load)
  • Low bus capacitance of 10pF (Max)
  • Fail-safe receiver for bus open, short, or idle
  • This reference design is orderable

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Schematic/Block Diagram

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Test Data

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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
ISO1176T  40-Mbps, half-duplex, isolated RS-485 & RS-422 transceiver with integrated transformer driver  Isolated interface ICs  Sample & Buy View Design Kits & Evaluation Modules
TPS763  150-mA, 10-V, low-dropout voltage regulator with enable  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ISO1176T Download Download
TPS763 Download

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Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 563 26 Sep 2013
Design files (3)
Title Type Size (KB) Date
ZIP 331 26 Sep 2013
PDF 98 26 Sep 2013
PDF 48 26 Sep 2013

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