System Basis Chip with CAN High-Speed and LIN Interface

MC34905
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The NXP® MC34905 system basis chip (SBC) with CAN high-speed and LIN interface. This chip is an analog companion chip for the MCU and combines voltage regulators, interface, monitoring and control, and other features to enhance module designs targeting the industrial market.

  • Built-in enhanced high-speed CAN interface (ISO11898-2 and -5) with local and bus failure diagnostics, protection, and fail-safe operation modes
  • The SBC may include two LIN 2.1 interfaces with LIN output pin switches
  • Includes up to four wake-up input pins that can also be configured as output drivers for flexibility
  • Powered by SMARTMOS® technology

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NXP<sup>&#174;</sup> MC34905 Internal Block Diagram - 30295
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Features

  • Voltage regulator for MCU, 5.0 or 3.3 V, part number selectable, with possibility of usage external PNP to extend current capability and share power dissipation
  • Very low quiescent current in LP modes
  • Fully protected embedded 5.0 V regulator for the CAN driver
  • Multiple undervoltage detections to address various MCU specifications and system operation modes
  • Auxiliary 5.0 or 3.3 V SPI configurable regulator, for additional ICs, with overcurrent detection and undervoltage protection
  • MUX output pin for device internal analog signal monitoring and power supply monitoring
  • Advanced SPI, MCU, ECU power supply, and critical pins diagnostics and monitoring.
  • Multiple wake-up sources in LP modes: CAN or LIN bus, I/O transition, automatic timer, SPI message, and VDD overcurrent detection.
  • ISO11898-5 high-speed CAN interface compatibility for baud rates of 40 kb/s to 1.0 Mb/s
  • Scalable product family of devices ranging from 0 to 1 LIN, compatible to J2602-2 and LIN 2.1

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