NXP Semiconductors MCZ33905S5EK

Overview

MCZ33905S5EK from NXP (formerly Freescale) is a second-generation System Basis Chip (SBC) integrating high-speed CAN, single LIN 2.1/J2602-2 transceiver, 5.0 V MCU regulator (150 mA standard, up to 300 mA with external PNP), internal 5.0 V CAN regulator, and fail-safe state machine - designed as a power management and communication hub for automotive body and safety ECUs. It operates from 5.5–28 V input, supports -40 °C to +125 °C ambient, and delivers 15 µA quiescent current in VDD-OFF low-power mode.

For engineers reviewing the MCZ33905S5EK datasheet, MCZ33905S5EK pinout, MCZ33905S5EK application, or MCZ33905S5EK equivalent, key selection criteria include its SOIC-32 exposed-pad package, single-LIN + CAN dual-bus capability, configurable wake-up I/O (up to 4 pins), integrated VSUP/VS2 sensing, and SAFE-pin-linked fail-safe behavior - all critical for gateways, seat modules, and lighting control units requiring ASIL-B-aware system-level monitoring.

Technical Context

The MCZ33905S5EK implements a hardware-managed fail-safe state machine triggered by SAFE pin assertion, with cranking pulse handling that maintains partial functionality during battery dips. Its SPI interface includes secured register access with parity checking and watchdog windowing, while analog monitoring routes VSUP, VS2-INT, and MUX-OUT through a shared analog multiplexer.

Power architecture integrates three independent regulators: VDD (5.0 V, 150 mA base), VAUX (5.0 V configurable), and dedicated 5.0 V VCAN supply - each with under-voltage detection and thermal shutdown. Wake-up inputs support cyclic sense and LIN/CAN bus activity detection without MCU intervention.

Key Specifications

Pinout & Package

MCZ33905S5EK uses a 32-pin SOIC wide-body package with exposed thermal pad (suffix EK), footprint compatible with MC33903/4/5-S variants. Pin functions are validated per MC33905S Simplified Application Drawing and Freescale document MC33903_4_5FS Rev. 6.0.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCZ33905S5EK, the B-version alternative improves startup predictability and sleep efficiency, while the MCZ33904B5EK/R2 removes LIN capability entirely - making it viable only in CAN-centric architectures where LIN is implemented separately or not required.

Availability

MCZ33905S5EK is available at Aetrix Electronics and suitable for automotive body controllers, seat modules, and lighting control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MCZ33905S5EK 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 applications, with deep heritage in automotive analog and power management ICs.

The MC33903/4/5 family was engineered to replace discrete power management + bus interface combinations in automotive ECUs - delivering integrated CAN/LIN SBC functionality with functional safety awareness and ultra-low-power operation.

FAQ

What is the maximum output current capability of the VDD regulator in MCZ33905S5EK?

The MCZ33905S5EK provides a 5.0 V VDD output rated for 150 mA continuous current. With an optional external PNP ballast transistor, total deliverable current increases to 300 mA - enabling support for higher-power MCUs like MPC560x without external DC-DC stages. This scalability is confirmed in the MC33905S Simplified Application Drawing and MC33903_4_5FS Rev. 6.0 datasheet.

Does MCZ33905S5EK support both LIN 2.1 and SAE J2602-2 standards?

Yes, MCZ33905S5EK's integrated LIN transceiver complies with both LIN 2.1 and SAE J2602-2 specifications, supporting data rates from 10.4 kB/s to 20 kB/s (100 kB/s in fast mode). This dual-standard compliance is explicitly stated in the Key Characteristics table and Features section of the MC33903_4_5FS Rev. 6.0 documentation.

How many wake-up sources does MCZ33905S5EK support, and are they configurable?

MCZ33905S5EK supports up to four wake-up capable I/O pins (I/O-0 to I/O-3), configurable either as wake-up inputs or LIN master termination outputs. The configuration is hardware-selectable via pin strapping or SPI programming - allowing flexible reuse across module variants without PCB redesign. This is documented in the MC33905S Simplified Application Drawing and Freescale part numbering matrix.

What is the purpose of the SAFE pin on MCZ33905S5EK, and how is it used?

The SAFE pin on MCZ33905S5EK is an open-drain output driven by the hardware fail-safe state machine. It asserts low during fault conditions (e.g., overtemperature, undervoltage, or watchdog timeout) to trigger external reset circuits or safety relays. Its behavior is independent of MCU firmware, ensuring deterministic response - a key requirement for ASIL-B systems as described in the Fail-Safe State Machine section of MC33903_4_5FS Rev. 6.0.

Is MCZ33905S5EK qualified for automotive use, and what standards does it meet?

Yes, MCZ33905S5EK is AEC-Q100 Grade 1 qualified (-40 °C to +125 °C), certified to ISO 11898-2/-5 for CAN, LIN 2.1/J2602-2 for LIN, and withstands ±8 kV HBM ESD on bus pins. It also meets ISO 7637-2 for load dump (40 V) and passes OEM-level EMC/ESD conformance testing - details verified in Freescale's published conformance reports and MC33903_4_5FS Rev. 6.0.