NXP Semiconductors MCZ33904C5EK

Overview

MCZ33904C5EK from NXP Semiconductors (formerly Freescale) is a second-generation System Basis Chip (SBC) integrating a 5.0 V MCU power regulator, high-speed CAN transceiver compliant with ISO 11898-2 and -5, four programmable wake-up inputs, and analog monitoring via MUX-OUT. It operates across −40 °C to +125 °C and targets automotive ECU power management with fail-safe operation and low-power modes.

For engineers reviewing the MCZ33904C5EK datasheet, MCZ33904C5EK pinout, MCZ33904C5EK application, or MCZ33904C5EK equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in diagnostics-enabled motor control and lamp drivers, and validated alternative parts for design continuity.

Technical Context

The MCZ33904C5EK implements a SMARTMOS-based power management architecture with integrated 5.0 V VDD regulator, embedded 5.0 V CAN driver supply, and configurable I/O pins supporting wake-up and cyclic sense functions. Its fail-safe state machine monitors VDD, RST, watchdog timeout, and overcurrent events to assert the open-drain SAFE pin.

It supports ISO 11898-5 high-speed CAN at baud rates from 40 kb/s to 1.0 Mb/s and includes SPI-controlled diagnostics for voltage, current, temperature, and bus faults. Unlike variants with LIN interfaces, MCZ33904C5EK has zero LIN channels and four dedicated wake-up inputs - all confirmed in Table 2 of Document MC33903_4_5 Rev. 10.0.

Key Specifications

Pinout & Package

MCZ33904C5EK uses a 32-pin SOIC package with exposed thermal pad (Pb-free EK suffix), pin-compatible with other 32-pin MC33903/33904/33905 variants per Figure 11 and Table 4.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SBC applications.

Compared with MCZ33903C5EK/R2, MCZ33904C5EK/R2 adds three extra wake-up inputs and full cyclic sense capability; versus MCZ33904B5EK/R2, it delivers verified SPI timing compliance and lower LP-mode current - critical for battery-backed automotive modules.

Availability

MCZ33904C5EK is available at Aetrix Electronics and suitable for automotive body control modules, lamp drivers, DC motor control systems, and industrial actuator controls requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MCZ33904C5EK 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The MC33903/4/5 family was designed as second-generation System Basis Chips to consolidate power regulation, CAN/LIN communication, and fail-safe supervision in automotive ECUs - reducing system complexity and improving functional safety compliance.

FAQ

What is the primary function of the MCZ33904C5EK in an automotive ECU?

The MCZ33904C5EK serves as a System Basis Chip that integrates MCU power regulation (5.0 V), high-speed CAN transceiver (ISO 11898-2/5), four wake-up inputs, and fail-safe monitoring. It replaces discrete regulators, CAN PHYs, and supervisory circuits - reducing board space and improving reliability in body control and motor drive ECUs. Its SAFE pin provides hardware-level fault signaling independent of MCU software execution, making MCZ33904C5EK essential for ASIL-B–capable systems.

Does the MCZ33904C5EK support LIN communication?

No, the MCZ33904C5EK does not include any LIN interface. Per Table 2 in Document MC33903_4_5 Rev. 10.0, the "MC33904" variant is explicitly defined as having zero LIN channels. This distinguishes it from MC33903D/S (1–2 LIN) and MC33905D/S (1–2 LIN). All LIN-related pins (LIN-T1, LIN-T2, RXD-L1, TXD-L1, etc.) are marked N/A for MCZ33904C5EK in Table 4's pin definitions - confirming LIN functionality is absent in this specific part number.

What are the key differences between the "B" and "C" versions of the MCZ33904 series?

The "C" version (e.g., MCZ33904C5EK/R2) resolves documented SPI timing deviations present in all "B" versions (e.g., MCZ33904B5EK/R2), improves oscillator stability, and eliminates RxD short-to-ground detection - a feature retained only in "B". Table 2 note 4 explicitly states "C" versions are recommended for new designs. MCZ33904C5EK/R2 also achieves lower quiescent current in LP modes compared to "B", enhancing battery life in always-on vehicle subsystems.

Can the MCZ33904C5EK drive external PNP transistors for higher VDD current?

No, the MCZ33904C5EK does not support external PNP extension of its VDD regulator. While the datasheet mentions PNP support for "33903/4/5" generically, Table 3 note 5 clarifies that VDD on the 33903 does *not* allow external PNP usage - and MCZ33904C5EK shares the same VDD architecture and 250 mA current limit. Pins VB, VE, and VBAUX are present but reserved for the internal regulator path; using them externally violates the specified operating conditions and voids guaranteed performance.

How does the MUX-OUT pin function on the MCZ33904C5EK?

The MUX-OUT pin on MCZ33904C5EK provides SPI-selectable analog monitoring of internal signals including VSENSE (battery voltage), VDD (MCU supply), VAUX (auxiliary regulator), and die temperature. A switchable internal pull-down resistor enables accurate VDD current measurement. The selected parameter appears at MUX-OUT for sampling by an external MCU ADC - eliminating need for additional sense resistors or op-amps. This capability is confirmed in Figure 9's block diagram and Table 4's pin definition.