System Basis Chip with High Speed CAN

MC33989

The NXP® MC33989 is a monolithic integrated circuit that combines many functions frequently used in MCU-based systems, making it an economical solution for providing power, high speed communication, and control.

  • Fully protected fixed 5.0 V low drop regulator output with current limit, over temperature pre-warning, and reset provides power for CAN and the MCU
  • Provides drive and sense inputs to implement a second 5.0 V regulator using an external series pass PNP that is resistor ratio adjustable to meet peripheral needs
  • An internally power supply voltage output with four wake-up inputs, programmable window watch-dog, interrupt, reset, high speed CAN transceiver and SPI input control

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Block Diagram

MC33989 BD

MC33989 BD
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Features

  • Low-drop voltage regulator with current limiting,over temperature pre-warning, and output monitoring with reset
  • Adjustable external series pass PNP regulator
  • Normal, standby, stop and sleep modes separate from CAN interface modes
  • 150 mA switched V BAT output for control of external circuitry
  • Four external wake-up inputs, associated with switched V BAT
  • Low standby and sleep current
  • V BAT monitoring and V BAT failure detection
  • 40 V maximum transient voltage
  • Software programmable watch-dog window, interrupt, and reset
  • Multiple wake-up modes
  • SPI interface to MCU
  • Utility for HS1 Vbat switch allowing drive of external switches pull up resistors or relays
  • This product is included in NXP®.s product longevity program, with assured supply for a minimum of 15 years after launch

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