NXP Semiconductors MCZ33904B5EKR2

Overview

MCZ33904B5EKR2 from NXP (formerly Freescale) is a second-generation System Basis Chip (SBC) serving as an automotive power management unit for MCUs and peripheral ICs in body, safety, and powertrain modules. It integrates a high-speed CAN transceiver (ISO 11898-2/5 compliant), 5.0 V MCU regulator (150 mA internal, scalable to 300 mA with external PNP), ultra-low-power sleep mode (15 µA with VDD off), and four configurable wake-up I/O pins. It operates across 5.5–28 V input and -40 °C to 125 °C ambient temperature.

For engineers reviewing the MCZ33904B5EKR2 datasheet, MCZ33904B5EKR2 pinout, MCZ33904B5EKR2 application, or MCZ33904B5EKR2 equivalent, key selection criteria include its single-CAN/no-LIN architecture, 5.0 V fixed VDD output, SOIC-32 exposed-pad package, fail-safe state machine linked to SAFE pin, and support for cranking pulse management during low-VDD conditions.

Technical Context

The MCZ33904B5EKR2 implements a dedicated 5.0 V linear regulator for MCU supply (VDD), an internal 5.0 V CAN driver supply (VCAN), and high-precision VSUP sensing with analog MUX capability. Its fail-safe state machine is hardware-configurable and tied to the SAFE pin for system-level fault response.

It supports ISO 11898-2 and -5 high-speed CAN physical layer operation (40 kB/s–1 MB/s), includes secured SPI with watchdog functionality, and enables cyclic wake-up sensing to reduce ECU energy consumption. No LIN interface is integrated - distinguishing it from MC33905 and MC33903D/S variants.

Key Specifications

Pinout & Package

MCZ33904B5EKR2 is housed in a Pb-free 32-pin SOIC Wide-body package with exposed thermal pad (98ASA10556D). The package supports high-power dissipation and mechanical robustness in automotive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCZ33904C5EKR2 and MC33903B5EKR2, MCZ33904B5EKR2 delivers balanced integration - retaining all four wake-up inputs, VSUP sensing, analog MUX, and SAFE-linked fail-safe logic while maintaining pin compatibility with the C-version for design flexibility.

Availability

MCZ33904B5EKR2 is available at Aetrix Electronics and suitable for body controller modules, seat belt pre-tensioner systems, fuel pump control units, electric parking brake actuators, and other automotive ECU applications requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.

Supply support for MCZ33904B5EKR2 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 semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in automotive-grade analog and power management ICs.

The MC33904 belongs to NXP's System Basis Chip Gen2 family - designed specifically to consolidate power regulation, high-speed CAN, and fail-safe supervision in automotive electronic control units for body, safety, and powertrain domains.

FAQ

What is the maximum output current of the VDD regulator in MCZ33904B5EKR2?

The MCZ33904B5EKR2 provides a fixed 5.0 V VDD output rated for 150 mA continuous current from the internal LDO. An optional external PNP transistor can extend this to 300 mA for higher MCU or peripheral loads - confirmed in the MC33903/4/5 datasheet Rev. 6.0, Section 7.2. This scalability supports both entry-level and mid-tier automotive microcontrollers without redesigning the power stage.

Does MCZ33904B5EKR2 support LIN communication?

No, MCZ33904B5EKR2 does not integrate any LIN transceiver or LIN master terminal outputs. It is explicitly a single-CAN, zero-LIN variant within the MC33903/4/5 family - as documented in the Freescale selector table and simplified application drawings. For LIN-capable alternatives, consider MCZ33905BD5EKR2 (dual LIN) or MCZ33903BS5EKR2 (single LIN).

What is the purpose of the SAFE pin on MCZ33904B5EKR2?

The SAFE pin on MCZ33904B5EKR2 is an open-drain output directly driven by the hardware fail-safe state machine. It asserts low during critical faults including VDD undervoltage, overtemperature, or oscillator failure - enabling immediate system-level response such as MCU reset or actuator deactivation. Its behavior is fully hardware-defined and requires no firmware polling, making it essential for ASIL-B–compliant designs.

Can MCZ33904B5EKR2 operate during automotive cranking events?

Yes, MCZ33904B5EKR2 implements innovative cranking pulse management that sustains core functionality - including CAN bus monitoring and wake-up detection - down to 6 V input. Unlike conventional regulators, it avoids external bulk capacitance by dynamically adjusting internal regulation during cranking, as verified in EMC/ESD conformance reports and application note AN3872. This ensures uninterrupted safety-critical operation during engine start.

Is MCZ33904B5EKR2 qualified to AEC-Q100 standards?

Yes, MCZ33904B5EKR2 is AEC-Q100 qualified for Grade 1 (-40 °C to +125 °C), with full test reports covering HTOL, TC, UHAST, and ESD (±8 kV module-level on CAN/LIN pins). This qualification is documented in NXP's MC33903_4_5FS datasheet Rev. 6.0 and supported by Freescale's automotive certification portfolio - confirming suitability for under-hood and chassis-mounted ECU applications.