MC33298DW

Overview

The MC33298DW is an N-channel power switch and driver IC manufactured by NXP USA Inc., housed in a 24-SOIC package. It features eight independent low-side outputs with a 1:8 input-to-output ratio, controlled via an SPI interface. The device supports load voltages from 9V to 26.5V and operates on a supply voltage of 2.5V to 4.5V. Each channel delivers up to 1A output current with a typical on-resistance of 350 mΩ. Integrated fault protection includes fixed current limiting, open-load detection, over-temperature shutdown, and over-voltage protection. It functions within a junction temperature range of -40°C to 150°C.

Feature Summary

• Eight-channel low-side power switching capability with individual control via serial peripheral interface
• Comprehensive integrated protection mechanisms including current limiting, thermal shutdown, and open-load detection
• Robust automotive-grade design supporting high junction temperatures and wide operating voltage ranges

Applications

• Automotive body electronics distribution
• Lighting control systems
• General-purpose load driving in industrial applications

Procurement Notes

Verify component authenticity through authorized distributors as the MC33298DW is officially listed as obsolete by NXP USA Inc. Confirm that the specific order suffix corresponds to the standard tube packaging variant. Ensure compliance with RoHS non-compliance status if required for specific environmental regulations. Validate lead times and availability constraints due to end-of-life status before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring multiple low-side switches controlled by a single microcontroller signal. The SPI interface allows for flexible configuration and diagnostic feedback. Consider the 350 mΩ on-resistance for power dissipation calculations at 1A loads. Ensure the system voltage remains within the 9V to 26.5V range. Evaluate the need for open-load detection and over-temperature protection features inherent to this device.

Part Context

The MC33298 belongs to NXP's family of smart power switches designed for automotive and industrial applications. It integrates power MOSFETs with control logic and protection circuits. The DW suffix indicates a 24-pin Small Outline Integrated Circuit (SOIC) package with a width of 7.50mm. This part serves as a bridge between low-voltage digital controllers and higher-voltage analog loads.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. As the product is marked as obsolete, alternative sourcing should focus on authorized stock or verified compatible replacements from NXP's current portfolio.