MC33879EKR2

Overview

The MC33879EKR2 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 status reporting, supporting supply voltages from 5.5V to 26.5V with a logic supply of 3.1V to 5.5V. The device utilizes SmartMOS technology to drive inductive, incandescent, or LED loads directly from a microcontroller. Each output provides a maximum current of 600mA with a typical on-resistance of 750 milliohms. Integrated fault protections include fixed current limiting, open load detection, overvoltage protection, and independent thermal shutdown.

Feature Summary

• Hardware-configurable high-side and low-side switching architecture
• Direct microprocessor interface via 16-bit SPI protocol
• Integrated SmartMOS technology combining CMOS logic and DMOS power MOSFETs
• Comprehensive fault management including current limiting and thermal protection

Applications

• Automotive engine control units (ECU)
• Small engine control systems
• Inductive load driving applications
• Incandescent lamp control
• LED lighting systems

Procurement Notes

Verify component authenticity through authorized NXP distributors. Confirm the specific suffix EKR2 matches the required 32-SOIC-EP package and tape-and-reel quantity. Check for RoHS compliance documentation and ensure the part status aligns with project lifecycle requirements, as availability may vary.

Selection Notes

Select this component when an eight-channel switch with individual configuration is required. Ensure the load voltage does not exceed 26.5V and the peak current remains within the 600mA limit per channel. Verify that the host microcontroller supports the necessary SPI interface and voltage levels for reliable communication and control.

Part Context

This device belongs to the MC33879 family of configurable serial switches designed for automotive and industrial environments. It integrates power MOSFETs with control logic to simplify system design by reducing external component count. The family supports various packaging options to accommodate different board space and thermal management needs.

Replacement Considerations

Check for functional equivalents with identical pinouts and SPI compatibility. Verify that any substitute maintains the same voltage ratings and current capabilities. Ensure the replacement supports the required fault detection features and operates within the specified temperature range.