Interface_KNX/EIB Transceiver

E981.33 | KNX/EIB Bit Transceiver


The E981.33 combines the TP1-256 physical layer and two DC supply outputs for bus powered applications. The internal power management assures KNX conformance under all load conditions.

KNX® Interface
- Analog Mode (direct RX / TX interface)

Included power supplies
- 20V supply, up to 20mA
- 3.3V / 5V (100mA) DC/DC converter


  • KNX/EIB transceiver, certified according to KNX TP1-256
  • Analog mode supported
  • Configuration pins for bus current & slope
  • Configuration pins for external clock frequency 8 or 7.3728 MHz
  • Further configuration and diagnosis via bit transceiver
  • Voltage regulators
    - 20V: current capability up to 25mA
    - 3.3V or 5V DC/DC converter: current capability up to 100mA


  • Sensors, actuators, routers, gateways, Bus-powered or externally supplied
  • Security applications

Ordering Information

  • Samples
    Part No.Temp. RangePackageOrder No.
    E981.33-25°C to +85°CQFN32L7E98133A38B


  • Boards
    Part No.DescriptionBoard typeOrder No.
    E981.33KNX/EIB TransceiverKNX TP 815 Evaluation Board V2K98133-0001


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Application Diagram

KNX/EIB Bit Transceiver