MC33879APEKR2518

MC33879APEKR2518 Configurable Octal Serial Switch

The MC33879APEKR2518 is a high-performance, 8-output configurable high-side/low-side switch manufactured by NXP Semiconductors, designed for automotive and industrial power distribution applications. Housed in a compact 32-pin SOIC-32EP (300mil) surface-mount package with an exposed pad for enhanced thermal dissipation, this device operates over a wide supply voltage range of 5.5V to 27.5V and supports an extended industrial/automotive temperature range of -40°C to +125°C. Built on NXP's SMARTMOS technology, it integrates CMOS logic, bipolar/MOS analog circuitry, and DMOS power MOSFETs, enabling robust, reliable load driving with comprehensive protection features.

Key Features & Application Scenarios

This octal switch delivers 0.6A to 1.2A per output with a typical RDS(ON) of 0.75Ω at 25°C, supporting flexible high-side/low-side configuration for diverse load types. It features a 16-bit SPI interface (3.3V/5.0V compatible) for MCU control and real-time fault reporting, plus two dedicated PWM inputs for direct pulse-width modulation control. 

Integrated protection includes +45V low-side / -20V high-side inductive voltage clamping, open-load detection (configurable for LED applications), internal reverse battery protection, short-circuit detection with automatic retry, and independent overtemperature protection. With a 5µA maximum standby current at 13V, it ensures low power consumption in idle states. Ideal for automotive body electronics, industrial control systems, and embedded designs, it drives solenoids, relays, DC motors, incandescent lamps, and LED arrays, providing centralized load management and fault diagnostics.

Alternative Equivalent Models

● MC33879APEK: NXP pin-compatible 8-output switch with WSOIC-32 package, identical electrical specs and SPI interface for tube-packaged designs.

● MC33879APEKR2: NXP SOIC-32EP packaged variant with 0.6A current limit, 27.5V rating, and identical protection features for tape-and-reel production.

● STMicroelectronics L9822: 8-output low-side driver with 1A per channel, SPI interface, and overcurrent protection, compatible with 12V automotive systems.

● onsemi NCV7718: 8-channel high-side switch with 1.2A current limit, 40V rating, and fault diagnostics, AEC-Q100 qualified for harsh automotive environments.

● Texas Instruments TPS22916: 8-channel load switch with 1A per channel, I2C control, and ultra-low on-resistance, suitable for industrial and consumer electronics.