MCZ33879AEK

Overview

The MCZ33879AEK is an NXP USA Inc. power switch featuring eight N-channel outputs in a 32-SOIC-EP package. It operates with a load voltage range of 5.5V to 27.5V and a supply voltage of 3.1V to 5.5V. The device delivers a maximum output current of 600mA with a typical on-resistance of 750 milliohms. Control is managed via a 16-bit SPI interface, supporting high-side or low-side configurations. Integrated fault protections include fixed current limiting, open load detection, and overvoltage protection, ensuring reliable operation across temperatures from -40°C to 150°C.

Feature Summary

• Configurable octal serial switch architecture supporting both high-side and low-side load driving capabilities
• Integrated SMARTMOS technology combining CMOS logic, bipolar/MOS analog circuits, and DMOS power MOSFETs
• Comprehensive fault management including short-circuit detection with auto-retry, independent thermal protection, and open load detection

Applications

• Industrial motor control systems requiring multi-channel switching
• Automotive engine control units (ECU) for solenoid and actuator driving
• Small engine control applications managing various inductive loads
• General-purpose load switching in industrial automation equipment

Procurement Notes

Verify component status as the MCZ33879 series may be discontinued. Confirm exact suffix requirements for packaging and temperature grade. Ensure compatibility with existing PCB footprints for the 32-SOIC-EP package. Review latest datasheet revisions for any parameter updates before finalizing procurement specifications.

Selection Notes

Select this component for applications requiring eight independently controllable channels with hardware-configurable high-side or low-side topology. Consider the 600mA output capability and integrated fault protection features for robust load management. Verify SPI interface compatibility with the host microcontroller and ensure adequate thermal dissipation for the SOIC-EP package in the target environment.

Part Context

The MCZ33879 belongs to NXP's SMARTMOS family, integrating digital control with power switching. It serves as a versatile solution for replacing multiple discrete switches, reducing board space and complexity. The device is designed for demanding environments, offering high reliability through integrated protection mechanisms against electrical overstress and thermal anomalies.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and functional compatibility if considering alternative octal switches from other manufacturers.