MCZ33996EK

Overview

The MCZ33996EK is a 16-channel low-side load controller manufactured by NXP Semiconductors. It features a 24-bit SPI interface for control and diagnostic functions, supporting PWM modulation for inductive, incandescent, and LED loads. The device operates within a supply voltage range of 5.0V to 27V and provides an output current limit between 0.9A and 2.5A per channel. It includes protection against over-temperature, short circuits, and over-voltage conditions. The component utilizes a 32-pin WSOIC package with an exposed pad (EP) and supports logic levels compatible with both 3.3V and 5.0V microcontrollers.

Feature Summary

• Integrates 16 independent low-side switches controlled via a 24-bit serial peripheral interface.
• Provides comprehensive fault management including over-current, over-temperature, and short-circuit protection.
• Supports pulse-width modulation (PWM) for precise control of resistive and inductive loads.

Applications

• Automotive engine management systems
• Diesel engine valve drivers
• General automotive load switching

Procurement Notes

Verify the specific suffix configuration when ordering, as variants such as MCZ33996EKR2 exist with different packaging formats like tape and reel. Confirm that the selected part number matches the required lead time and availability status, noting that some sources indicate end-of-life or obsolete status for certain revisions. Ensure the procurement documentation aligns with the active manufacturing status to avoid supply chain disruptions during design-in.

Selection Notes

Select this component for applications requiring high channel density and integrated diagnostics to reduce microcontroller software burden. The device is suitable for environments demanding robust protection mechanisms against electrical faults. Consider the thermal performance provided by the exposed pad package for efficient heat dissipation. Verify compatibility with the system's SPI clock speeds and logic voltage levels before integration into the final design.

Part Context

The MCZ33996EK belongs to the MC33996 family of SMARTMOS low-side switches designed for automotive and industrial applications. This series integrates multiple open-drain MOSFET outputs to drive heavy loads while minimizing conduction losses. The family is engineered to handle harsh operating conditions, offering reliability for critical vehicle subsystems where precise load control and fault detection are essential for system safety and functionality.

Replacement Considerations

Publicly confirmed substitute part numbers include MC33996EK/R2 and MCZ33996EKR2. These variants share the same core functional specifications but may differ in shipping packaging, such as reel versus tube configurations. Verify pinout compatibility and thermal characteristics when transitioning between these specific suffixes to ensure seamless hardware integration without circuit redesign.