MC33908AER2

Overview

The MC33908AER2 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 the MCU core, 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 supports ASIL D functional safety requirements through enhanced safety blocks and secured SPI interfaces. The component operates within a temperature range of -40°C to +125°C and is available in an LQFP-48EP package.

Feature Summary

• Integrates flexible DC/DC pre-regulator supporting Buck or Buck-Boost topologies for efficient energy management
• Includes advanced functional safety measures designed for ASIL D applications with fail-safe outputs
• Features integrated high-speed CAN and LIN physical interfaces with robust EMC and ESD protection
• Provides multiple wake-up sources combined with ultra-low-power modes for optimized system availability

Applications

• Electrical Power Steering systems
• Automotive Engine Control Units
• General purpose automotive microcontroller power supply

Procurement Notes

Verify the specific suffix 'AER2' against the official datasheet to confirm package type and tape/reel specifications. Confirm current production status as product longevity programs may affect long-term availability. Ensure compatibility with existing PCB footprints for the LQFP-48EP package. Check for any recent Product Change Notifications regarding manufacturing site transfers or material updates.

Selection Notes

Select this component when designing systems requiring integrated power management and communication interfaces in a single chip. It is suitable for applications needing high efficiency via DC/DC regulation and strict functional safety compliance. Consider the 1.5 A core current capability and the flexibility of the pre-regulator topology. Evaluate the need for integrated CAN/LIN transceivers to reduce bill of materials count.

Part Context

The MC33908 belongs to NXP's System Basis Chip family, which combines power management and communication interfaces. It is part of a broader portfolio of automotive PMICs designed to simplify ECU design. The device complements NXP's automotive microcontrollers by providing dedicated power rails and safe communication links. It represents a second-generation approach to integrating safety-critical functions into a compact form factor.

Replacement Considerations

Check for form-fit-function compatible alternatives within the MC3390x series if the exact suffix is unavailable. Verify that any substitute maintains ASIL D certification and identical interface standards.