MC33879APEK

Overview

The MC33879APEK is an eight-output hardware-configurable high-side/low-side switch featuring a 16-bit Serial Peripheral Interface (SPI) control interface. It utilizes SmartMOS technology, integrating CMOS logic, bipolar/MOS analog circuitry, and DMOS power MOSFETs. The device operates with a supply voltage range of 5.5V to 27.5V and supports a logic supply of 3.1V to 5.5V. It provides a maximum output current of 600mA per channel with a typical on-resistance of 750 milliohms at 25°C. Two outputs allow direct microprocessor control for PWM applications. Fault protection includes fixed current limiting, open load detection, and overvoltage protection.

Feature Summary

• Hardware-configurable high-side or low-side switching architecture
• Direct microprocessor interface via 16-bit SPI protocol
• Integrated SmartMOS technology combining digital and power stages
• Comprehensive fault diagnostics including open load and overvoltage detection

Applications

• Programmable Logic Controller (PLC) systems
• Remote I/O modules in distributed control systems
• Inductive load control interfaces
• Incandescent lamp driving circuits
• LED load management applications

Procurement Notes

Verify the specific suffix 'E' against the manufacturer's official documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Check for end-of-life notifications as availability may be limited. Ensure the selected variant matches the required thermal performance and pinout configuration for the target PCB layout.

Selection Notes

Select this component when an eight-channel switching solution with independent high-side or low-side configuration is required. The integrated SPI interface reduces microcontroller pin count compared to parallel alternatives. Consider the 600mA output capability and 750mΩ on-resistance for thermal management in dense layouts. The device is suitable for environments requiring robust fault protection and diagnostic feedback through the serial interface.

Part Context

This part belongs to the MC33879 family of configurable serial switches designed by NXP Semiconductors. These devices are engineered for industrial and automotive applications requiring reliable load switching. The family leverages SmartMOS technology to provide high integration and efficiency. The MC33879APEK specifically denotes the SOIC-EP package variant within this series.

Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify pin compatibility and electrical parameters before replacing.