NXP Semiconductors MCZ33903CD3EKR2

Overview

MCZ33903CD3EKR2 from NXP (formerly Freescale) is a second-generation System Basis Chip (SBC) integrating high-speed CAN and dual LIN physical layers, MCU power regulation (5.0 V/150 mA), internal 5.0 V CAN regulator, fail-safe state machine, and configurable wake-up I/Os. It serves as the central power and communication interface for automotive ECUs in body control, seat modules, and lighting systems.

For engineers reviewing the MCZ33903CD3EKR2 datasheet, MCZ33903CD3EKR2 pinout, MCZ33903CD3EKR2 application, or MCZ33903CD3EKR2 equivalent, key selection criteria include dual-LIN support with 10.4–20 kB/s data rate, ISO 11898-2/5-compliant CAN transceiver, 15 µA sleep current with active wake-up capability, and SOIC-32 exposed-pad package compatibility with automotive-grade thermal performance.

Technical Context

The MCZ33903CD3EKR2 implements an enhanced high-speed CAN physical layer compliant with ISO 11898-2 and -5, supporting 40 kB/s to 1.0 MB/s data rates with bus failure diagnostics and fail-safe operation. Its dual LIN 2.1/J2602-2 interfaces operate at 10.4–20 kB/s (100 kB/s fast mode) and support configurable LIN termination outputs.

It integrates a secured SPI interface with watchdog capability, high-precision VSUP sensing, analog MUX with multiple inputs, and a configurable fail-safe state machine linked to the SAFE pin. Power management includes cranking pulse handling, under-voltage detection, and selectable VDD output voltage (5.0 V).

Key Specifications

Pinout & Package

MCZ33903CD3EKR2 is housed in a Pb-free 32-pin SOIC wide-body package with exposed thermal pad (98ASA10556D), optimized for automotive thermal dissipation and board-level reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCZ33903CD3EKR2, MCZ33903BD3EKR2 offers identical dual-LIN/CAN capability at 3.3 V for low-voltage MCUs, while MCZ33905CD3EKR2 extends functionality with auxiliary regulation and analog sensing-but requires PCB redesign due to 54-pin packaging and larger footprint.

Availability

MCZ33903CD3EKR2 is available at Aetrix Electronics and suitable for automotive body electronics, seat control modules, and lighting control systems requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.

Supply support for MCZ33903CD3EKR2 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, industrial, and IoT semiconductor solutions, with deep expertise in SMARTMOS analog-power integration and functional safety design.

The MC33903 family was designed as a second-generation System Basis Chip targeting cost-sensitive, space-constrained automotive ECUs needing integrated high-speed CAN, dual LIN, and robust power management without external ballast transistors.

FAQ

What is the maximum output current of the VDD regulator in MCZ33903CD3EKR2?

The VDD regulator in MCZ33903CD3EKR2 delivers a fixed 5.0 V output with a maximum continuous current of 150 mA. Unlike MC33904/MC33905 variants, the MC33903 family does not support external PNP transistor boosting-this limitation is explicitly defined in the MC33903 datasheet block diagram and feature summary. The 150 mA rating is sufficient for most 32-bit automotive MCUs operating at moderate clock speeds and peripheral loads.

Does MCZ33903CD3EKR2 support LIN fast-mode operation?

Yes, MCZ33903CD3EKR2 supports LIN fast-mode operation at 100 kB/s on both LIN-1 and LIN-2 interfaces, as confirmed in the Key Characteristics table and LIN interface specifications. This capability enables faster configuration and diagnostic messaging in time-critical subnetworks such as seat position memory or adaptive lighting calibration, while maintaining full LIN 2.1 and SAE J2602-2 compliance.

What package type and thermal characteristics does MCZ33903CD3EKR2 use?

MCZ33903CD3EKR2 uses a Pb-free 32-pin SOIC wide-body package with exposed thermal pad (document number 98ASA10556D). The exposed pad enhances thermal dissipation, enabling operation up to +125 °C ambient in under-hood applications. Thermal resistance (θ_JA) is 52 °C/W per Freescale's MC33903_4_5FS Rev. 6.0 datasheet, supporting reliable performance in sealed ECU enclosures without forced airflow.

How does MCZ33903CD3EKR2 handle battery cranking events?

MCZ33903CD3EKR2 implements innovative cranking pulse management that maintains regulated VDD and active CAN/LIN wake-up capability during battery dips down to 5.5 V. It avoids brown-out resets and preserves communication readiness without requiring external hold-up capacitance-reducing system cost and PCB area. This behavior is verified in the "Energy Savings" and "Functional Safety" sections of the official datasheet.

Is MCZ33903CD3EKR2 qualified to AEC-Q100 standards?

Yes, MCZ33903CD3EKR2 is AEC-Q100 qualified for Grade 1 (−40 °C to +125 °C), as documented in Freescale's MC33903_4_5FS Rev. 6.0 datasheet and supported by conformance reports referenced in the Development Tools section. This qualification covers stress testing for temperature cycling, humidity, ESD, and mechanical shock-ensuring suitability for automotive body, safety, and powertrain applications.