NXP Semiconductors MCZ33904B3EK

Overview

MCZ33904B3EK 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. It integrates a 3.3 V / 150 mA LDO regulator (VDD), internal 5.0 V CAN transceiver supply (VCAN), high-speed CAN physical layer (ISO 11898-2/5 compliant), secured SPI with watchdog, fail-safe state machine, and four configurable wake-up I/O pins - deployed in body control modules, seat modules, and lighting control units.

For engineers reviewing the MCZ33904B3EK datasheet, MCZ33904B3EK pinout, MCZ33904B3EK application, or MCZ33904B3EK equivalent, key selection considerations include its 3.3 V VDD output, absence of LIN interface, quad wake-up I/O capability, SOIC-32 exposed-pad package, and ultra-low 15 µA sleep current with active CAN/LIN wake detection.

Technical Context

The MCZ33904B3EK implements a fail-safe state machine linked to the SAFE pin and supports cranking pulse management during low-VDD conditions without external capacitors. Its CAN physical layer meets ISO 11898-2 and -5 standards with bus failure diagnostics and protection, while the secured SPI interface includes parity checking and windowed timeout functionality.

Power architecture features a fixed 3.3 V VDD LDO (150 mA internal, no external PNP support), dedicated 5.0 V VCAN regulator, and analog monitoring via VSUP sense with high-precision voltage threshold detection. All four I/O pins are configurable as wake-up inputs only - no LIN termination capability - distinguishing it from MC33905 or MC33903D variants.

Key Specifications

Pinout & Package

MCZ33904B3EK is housed in a 32-pin SOIC wide-body package with exposed thermal pad (suffix EK), optimized for automotive PCB thermal management and reflow compatibility. Pin functions are validated per MC33904 datasheet Rev. 6.0 and Freescale application drawings.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCZ33903B3EK, MCZ33904B3EK offers triple the wake-up inputs and full analog monitoring; versus MCZ33905BD3EK, it trades LIN capability and package size for lower cost and simpler integration in CAN-only body modules.

Availability

MCZ33904B3EK is available at Aetrix Electronics and suitable for body control modules, seat modules, and lighting control modules requiring stable component supply, automotive qualification, and long-term lifecycle support.

Supply support for MCZ33904B3EK 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, delivering high-reliability analog, power, and mixed-signal ICs built on SMARTMOS technology.

The MC33904 product line is part of NXP's System Basis Chip Gen2 family - engineered specifically for automotive ECU power management and high-speed CAN communication in body, safety, and chassis domains.

FAQ

What is the maximum output current capability of the VDD regulator in MCZ33904B3EK?

The MCZ33904B3EK provides a fixed 3.3 V VDD output rated for up to 150 mA. Unlike MC33905 variants, it does not support external PNP ballast transistors - so the 150 mA limit is absolute and cannot be extended. This value is specified across −40 °C to +125 °C and is validated per MC33904 datasheet Rev. 6.0.

Does MCZ33904B3EK support LIN communication?

No, MCZ33904B3EK does not integrate any LIN transceiver or LIN master terminal outputs. It is a CAN-only SBC variant. The "4" in MC33904 explicitly denotes zero LIN interfaces - confirmed by Freescale's part numbering matrix and simplified application drawings. LIN capability requires MC33903D, MC33903S, MC33905D, or MC33905S variants.

What wake-up sources does MCZ33904B3EK support, and how are they configured?

MCZ33904B3EK supports exactly four dedicated wake-up inputs (I/O-0 through I/O-3), all configurable only as edge-sensitive wake-up pins - no LIN termination or general-purpose output capability. Configuration is hardware-selectable via SPI registers; no external resistors or jumpers are required. This matches the "4 Wake-up" entry in the official Freescale part matrix for MCZ33904B3EK/R2.

Is MCZ33904B3EK pin-compatible with other MC3390x family members?

MCZ33904B3EK shares the SOIC-32 exposed-pad package with MCZ33903B3EK and MCZ33903S3EK, but pin functions differ significantly - especially regarding VAUX, VSENSE, MUX, and SAFE pin presence. It is not pin-compatible with MC33905 variants (SOIC-54). Direct replacement requires schematic and layout revision due to differing I/O allocation and missing analog monitoring pins.

What automotive qualification standards does MCZ33904B3EK meet?

MCZ33904B3EK is qualified to AEC-Q100 Grade 1 (−40 °C to +125 °C) and complies with ISO 11898-2 and ISO 11898-5 for high-speed CAN physical layer operation. It also meets module-level ESD immunity of ±8 kV per ISO 10605 and has passed OEM-level EMC conformance testing as documented in Freescale's MC33903_4_5FS Rev. 6.0 report package.