NXP Semiconductors MCZ33903B5EKR2

Overview

MCZ33903B5EKR2 from NXP (formerly Freescale) is a second-generation System Basis Chip (SBC) designed as an automotive power management and communication interface unit for MCU-based ECUs in body, safety, and powertrain systems. It integrates a 5.0 V/150 mA MCU voltage regulator (VDD), high-speed CAN transceiver compliant with ISO 11898-2 and -5, no LIN interface, single wake-up input, and fail-safe state machine - deployed in door modules, lighting control, and seat belt pre-tensioner systems.

For engineers reviewing the MCZ33903B5EKR2 datasheet, MCZ33903B5EKR2 pinout, MCZ33903B5EKR2 application, or MCZ33903B5EKR2 equivalent, key selection criteria include its 5.0 V VDD output without external ballast support, absence of VAUX/VSENSE/MUX features, SOIC-32 exposed pad package, 15 µA low-power mode current, and ISO 11898-2/-5 CAN compliance - critical for ECU designs requiring minimal quiescent current and cranking pulse resilience.

Technical Context

The MCZ33903B5EKR2 implements a dedicated 5.0 V linear regulator for MCU supply (150 mA max, no external PNP support), an internal 5.0 V CAN driver supply (VCAN), and a fail-safe state machine linked to the SAFE pin. Its CAN physical layer supports data rates from 40 kB/s to 1.0 MB/s with bus failure diagnostics and protection modes.

It provides one configurable I/O pin with wake-up capability, lacks VAUX, VSENSE, and analog MUX functions, and operates across 5.5–28 V input with ±8 kV module-level ESD protection on CAN. Cranking pulse management is implemented via under-voltage detection and controlled state transitions during battery dip events.

Key Specifications

Pinout & Package

MCZ33903B5EKR2 is housed in a Pb-free 32-pin SOIC Wide-body package with exposed thermal pad (98ASA10556D), optimized for automotive thermal and mechanical reliability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar system basis chip applications.

Compared with MCZ33903B5EKR2, MCZ33904B5EK/R2 offers greater wake-up flexibility for sensor-rich nodes, while MCZ33903BD5EK/R2 adds LIN connectivity at identical footprint - both retain the same 5.0 V/150 mA VDD, ISO 11898-2/-5 CAN, and 15 µA sleep current.

Availability

MCZ33903B5EKR2 is available at Aetrix Electronics and suitable for door modules, lighting control modules, seat belt pre-tensioners, and engine management low-end applications requiring stable component supply, automotive qualification, and long-term lifecycle support.

Supply support for MCZ33903B5EKR2 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 certification.

The MC33903 family is part of NXP's System Basis Chip Gen2 platform, engineered specifically for cost-sensitive, safety-aware automotive ECUs needing integrated power, CAN, and fail-safe control - without LIN overhead.

FAQ

What is the maximum output current of the VDD regulator in MCZ33903B5EKR2?

The MCZ33903B5EKR2 provides a fixed 5.0 V VDD output rated for up to 150 mA. Unlike variants with external ballast support (e.g., MCZ33903BD5EK/R2), this version does not support external PNP transistor augmentation, so the 150 mA limit is absolute and non-scalable. This makes MCZ33903B5EKR2 suitable for MCUs with moderate current demands, such as S12x or S08x derivatives used in lighting or door modules.

Does MCZ33903B5EKR2 support LIN communication?

No, MCZ33903B5EKR2 does not integrate any LIN transceiver or LIN master terminal outputs. It belongs to the base variant of the MC33903 family with CAN-only interface and a single wake-up I/O. LIN capability is present only in MCZ33903S (single LIN) and MCZ33903D (dual LIN) variants - confirmed by Freescale documentation identifying MCZ33903B5EKR2 as a "no LIN" device with I/O Wake-up Capability = 1.

What package type and pin count does MCZ33903B5EKR2 use?

MCZ33903B5EKR2 uses a Pb-free 32-pin SOIC Wide-body package with exposed thermal pad (document number 98ASA10556D). This package is mechanically and thermally optimized for automotive under-hood environments and shares footprint compatibility with other SOIC-32 SBCs in the MC33903/4/5 family, enabling layout reuse across variants where pin count and thermal requirements align.

How does MCZ33903B5EKR2 handle battery cranking conditions?

MCZ33903B5EKR2 implements innovative cranking pulse management that maintains regulated VDD and CAN operation during battery dips down to 6 V, without requiring external hold-up capacitors. Its under-voltage detection circuitry triggers controlled state transitions rather than hard reset, preserving CAN bus context and enabling rapid recovery post-cranking - validated per ISO 16750-2 Pulse 4a test profiles.

Is MCZ33903B5EKR2 qualified for automotive applications?

Yes, MCZ33903B5EKR2 is AEC-Q100 qualified for automotive use and certified to ISO 11898-2 and -5 for CAN, ±8 kV HBM ESD on CAN pins, and full EMC/ESD conformance per OEM requirements. It is deployed in production body, safety, and powertrain ECUs - including door modules and seat belt pre-tensioners - and supports functional safety goals up to ASIL-B via its fail-safe state machine and SAFE pin signaling.