NXP Semiconductors MCZ33903C3EKR2

Overview

MCZ33903C3EKR2 from NXP (formerly Freescale) is an automotive System Basis Chip (SBC) integrating a high-speed CAN transceiver (ISO 11898-2/5), 5.0 V MCU power regulator (150 mA), internal 5.0 V CAN supply, secured SPI with watchdog, and fail-safe state machine. It serves as the central power management and communication interface for MCUs in body electronics modules requiring robust wake-up, cranking resilience, and functional safety support.

For engineers reviewing the MCZ33903C3EKR2 datasheet, MCZ33903C3EKR2 pinout, MCZ33903C3EKR2 application, or MCZ33903C3EKR2 equivalent, key selection criteria include its 5.0 V VDD output without external ballast support, single CAN interface, zero LIN transceivers, 1 configurable wake-up I/O, absence of VAUX/VSENSE/MUX features, SOIC-32 exposed pad package, and compliance with ISO 11898-2/5 for automotive network reliability.

Technical Context

The MCZ33903C3EKR2 implements a dedicated high-speed CAN physical layer compliant with ISO 11898-2 and -5, including bus failure diagnostics and fail-safe operation modes triggered via the SAFE pin. Its power architecture integrates a fixed 5.0 V linear regulator for the MCU (VDD) with 150 mA output capability and no external PNP support - distinguishing it from higher-current variants like MC33904/905.

It features a secured SPI interface with parity checking and windowed watchdog functionality, coupled with a configurable fail-safe state machine that responds to undervoltage, overtemperature, and CAN/LIN fault conditions. Cranking pulse management is implemented in hardware to maintain partial functionality during battery dips down to 5.5 V, without requiring external capacitors.

Key Specifications

Pinout & Package

MCZ33903C3EKR2 uses a 32-pin SOIC Wide-body package with exposed thermal pad (98ASA10556D), optimized for automotive PCB layouts requiring thermal dissipation and EMI robustness.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar System Basis Chip applications.

Compared with MCZ33903C3EKR2, MCZ33904C3EK/R2 offers expanded I/O and sensing capabilities for scalable body ECUs, while MCZ33903C5EK/R2 provides identical functionality with updated revision coding - neither is pin-compatible with LIN-enabled variants like MC33905.

Availability

MCZ33903C3EKR2 is available at Aetrix Electronics and suitable for body controller modules, door modules, lighting control units, and column modules requiring stable component supply across automotive production lifecycles.

Supply support for MCZ33903C3EKR2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global leader in automotive semiconductor solutions, specializing in SMARTMOS analog-power-logic integration for safety-critical and power-efficient vehicle systems.

The MC33903 family delivers Gen2 System Basis Chips targeting body, safety, and powertrain domains - designed to consolidate power regulation, CAN communication, and fail-safe monitoring into a single AEC-Q100 qualified device.

FAQ

What is the maximum output current of the VDD regulator in MCZ33903C3EKR2?

The MCZ33903C3EKR2 provides a fixed 5.0 V VDD output with a maximum continuous current of 150 mA. Unlike MC33904 or MC33905 variants, it does not support external ballast transistors for scaling to 300 mA. This rating is sufficient for S08x and S12x MCUs in low-power body electronics applications where external regulators are unnecessary.

Does MCZ33903C3EKR2 support LIN transceivers?

No, MCZ33903C3EKR2 does not integrate any LIN transceivers. It belongs to the base MC33903 variant family with only a high-speed CAN interface and no LIN capability. For LIN support, engineers must select MC33903D (dual LIN), MC33903S (single LIN), or MC33904/905 series - all of which are distinct part numbers with different pinouts and features.

What package type and thermal characteristics does MCZ33903C3EKR2 use?

MCZ33903C3EKR2 uses a 32-pin SOIC Wide-body package with exposed thermal pad (98ASA10556D). The exposed pad enhances thermal dissipation in automotive under-hood environments and supports solder reflow profiles compliant with JEDEC J-STD-020. Its RθJA is specified at 50 °C/W under standard PCB layout conditions.

How does MCZ33903C3EKR2 handle battery cranking events?

MCZ33903C3EKR2 implements hardware-based cranking pulse management that maintains regulated 5.0 V VDD output and CAN communication down to 5.5 V input. During cranking, it enters a degraded operational mode - sustaining critical functions without external hold-up capacitors - reducing BOM cost and PCB space versus discrete solutions.

Is MCZ33903C3EKR2 qualified for automotive applications?

Yes, MCZ33903C3EKR2 is AEC-Q100 qualified for Grade 1 (−40 °C to +125 °C) operation and certified to ISO 11898-2/5 for CAN, with ±8 kV module-level ESD protection. It meets OEM requirements for EMC, ESD, and functional safety in body electronics, having been validated in production gateways, door modules, and lighting ECUs since 2012.