System Basis Chip with LIN

MC33689

The NXP® MC33689 is a serial peripheral interface (SPI) controlled system basis chip that combines frequently used functions in an MCU-based system with a LIN transceiver. Applications include power window, mirror, and seat controls.

  • 5.0 V, 50 mA low dropout regulator with full protection and reporting features
  • Full SPI readable diagnostics and a selectable timing watchdog for detecting errant operation
  • Three operational modes: Normal (all functions available), Sleep (VDD OFF, wake-up via LIN bus or wake-up inputs), and Stop (VDD ON, wake-up via MCU, LIN bus, or wake-up inputs)

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Block Diagram

MC33689 Simplified Application Block Diagram

MC33689 Simplified Application Block Diagram
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Features

General

  • Full-duplex SPI Interface at frequencies up to 4.0 MHz
  • LIN transceiver capable to 100 kbps with waveshaping capability
  • 5.0 V low dropout regulator with full fault detection and protection
  • One 50 mA and two 150 mA protected high side switches
  • Current sense operational amplifier
  • Compatible with LIN 2.0 specification package

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