MC33908NAE

Overview

The MC33908NAE is a System Basis Chip (SBC) from NXP Semiconductors designed for automotive applications. It integrates multiple power supplies, including a DC/DC switching regulator delivering up to 1.5 A for MCU core supply, and linear regulators for I/O and auxiliary loads. The device features high-speed CAN and LIN physical interfaces compliant with ISO 11898-2/-5 and LIN 2.2 standards. It operates within an input voltage range of 2.7 V to 40 V and supports junction temperatures from -40 °C to +125 °C. Packaged in LQFP-48, it includes advanced functional safety measures targeting ASIL D compliance.

Feature Summary

• Integrates flexible SMPS pre-regulator supporting Buck or Buck-Boost topologies for efficient energy management.
• Includes secured SPI interface and configurable I/Os for wake-up and safety purposes.
• Features robust physical layers with high EMC immunity and ESD robustness for CAN and LIN communication.

Applications

• Electrical Power Steering
• Automotive Engine Control Modules
• Body Control Modules

Procurement Notes

Verify the specific suffix 'NAE' against the official datasheet to confirm pinout and package details. Check current lifecycle status as some variants may be approaching end-of-life. Ensure compatibility with required functional safety documentation such as FMEDA reports before integration into safety-critical designs.

Selection Notes

Select this component when a single-chip solution is needed for MCU power and communication in automotive systems. It is suitable for designs requiring integrated CAN/LIN transceivers and high-efficiency DC/DC conversion. Consider the 1.5 A output capability for core power needs and the ASIL D design target for safety requirements.

Part Context

This part belongs to the MC3390x family of System Basis Chips, which combine power management and communication interfaces. These devices are engineered to reduce board space and simplify system architecture by integrating regulators, transceivers, and safety logic into a single package for automotive microcontroller support.

Replacement Considerations

Public confirmed substitute part numbers: MC33908AE, MC33908NAER2.