MC33879APEKR2

Overview

The MC33879APEKR2 is an eight-output hardware-configurable high-side/low-side switch manufactured by NXP USA Inc. It features a 16-bit Serial Peripheral Interface (SPI) for control and supports supply voltages from 5.5V to 27.5V with a logic supply of 3.1V to 5.5V. The device utilizes SmartMOS technology, integrating CMOS logic, bipolar/MOS analog circuitry, and DMOS power MOSFETs. Each output provides a maximum current of 600mA with a typical on-resistance of 750 milliohms. It includes fault protection mechanisms such as fixed current limiting, open load detection, and overvoltage protection, operating within a temperature range of -40°C to 125°C.

Feature Summary

• Hardware-configurable eight-output architecture supporting both high-side and low-side switching configurations.
• Integrated SmartMOS technology combining CMOS logic, bipolar/MOS analog circuits, and DMOS power MOSFETs.
• Direct microcontroller interface via 16-bit SPI with support for PWM applications on two outputs.
• Comprehensive diagnostic capabilities including open load detection, short-circuit protection, and independent thermal shutdown.

Applications

• Control of inductive loads in industrial automation systems
• Driving incandescent lamps in automotive lighting applications
• LED load management in general-purpose switching environments

Procurement Notes

Verify component status carefully as the MC33879APEKR2 is listed as obsolete or discontinued by the manufacturer. Confirm availability through authorized distributors or secondary market suppliers if immediate procurement is required. Ensure that any replacement components maintain compatibility with the 32-SOIC-EP package and electrical specifications to avoid redesign efforts.

Selection Notes

Select this component when a multi-channel switching solution with integrated diagnostics is required. The 1:4 input-to-output ratio allows efficient control of multiple loads using minimal microcontroller pins. Consider the 750 milliohm on-resistance for power dissipation calculations and ensure the load current does not exceed the 600mA limit per channel. Verify SPI compatibility with the host controller's voltage levels.

Part Context

This part belongs to the MC33879 family of configurable serial switches designed for robust load control. It is often evaluated using the KIT33879AEKEVB evaluation board, which supports development with Freedom KL25Z microcontrollers. The device is part of NXP's portfolio for power management and load driver applications, emphasizing reliability and diagnostic feedback in harsh environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, engineers should consult NXP sales offices or authorized distributors for potential last-time buy options or equivalent alternatives with matching pinouts and electrical characteristics.

FAQ

Can the MC33879APEKR2 directly interface with 3.3V and 5.0V microcontrollers?

Yes, the device supports direct connection to microcontrollers and is compatible with both 3.3V and 5.0V logic levels via its SPI interface.

What specific fault protections are included in the MC33879?

The device includes fixed current limiting, open load detection, overvoltage protection, and independent thermal shutdown for each output channel.