The star coupler is part of the electrical, physical layer in a FlexRay™ communication network. The E981.56 provides interfaces to connect up to four branches of twisted pair physical bus lines to other bus drivers or star... read more


  • Active star for coupling 4 branches (pin compatible)
  • Compliant with FlexRay™ EPL v3.0.1
  • Available Interfaces
    - Host interface (configuration, diagnosis, mode control)
    - Intra-star interface (banking of several devices)
    - Bus guardian interface (transmitter control)
    - Communication controller interface
  • Support of arbitrary network architectures by banking


Document Description Type
Info Sheet PDF 219 kB

Application Diagram


  • Star coupler and additionally usable as transceiver in FlexRay™ nodes (ECUs)
  • Body Computer

Ordering Information

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Part No. Temp. Range Package Order No.
E981.56 -40°C to +125°C QFN44L5 E98156A63B


Part No. Description Board type Order No.
E981.56 FlexRay™ Active Star Device (4-Branch) Evaluation Board K98156-0001
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