NXP Semiconductors MCZ33903CD3EK

Overview

MCZ33903CD3EK from NXP (formerly Freescale) is a second-generation System Basis Chip (SBC) integrating high-speed CAN transceiver (ISO 11898-2/5), dual LIN 2.1/J2602-2 interfaces, 5.0 V MCU regulator (150 mA), internal 5.0 V CAN regulator, and fail-safe state machine - designed as power management and communication hub for automotive body control modules requiring robust wake-up, diagnostics, and low-power operation.

For engineers reviewing the MCZ33903CD3EK datasheet, MCZ33903CD3EK pinout, MCZ33903CD3EK application, or MCZ33903CD3EK equivalent, key selection considerations include its dual-LIN capability with configurable I/O wake-up pins, 5.0 V VDD output without external ballast support, VSUP sense monitoring, MUX-based analog sensing, and SOIC-32 exposed-pad package for thermal performance in under-hood environments.

Technical Context

The MCZ33903CD3EK implements an ISO 11898-2/5-compliant CAN physical layer with SPLIT pin and bus failure diagnostics, plus two independent LIN 2.1 transceivers each supporting 10.4–20 kB/s (100 kB/s fast mode). Its fail-safe state machine is hardware-configurable via SAFE pin and linked to cranking pulse management during low-VDD conditions.

Power architecture includes a fixed 5.0 V LDO for MCU supply (150 mA, no external PNP option), dedicated 5.0 V CAN regulator, and high-precision VSUP monitoring with analog MUX output. It supports ultra-low-power sleep mode (15 µA VDD-OFF) and cyclic wake-up sensing without MCU intervention.

Key Specifications

Pinout & Package

MCZ33903CD3EK is housed in a Pb-free 32-pin SOIC Wide-body package with exposed thermal pad (98ASA10556D), optimized for thermal dissipation in automotive modules. Pin functions are validated per MC33903D Simplified Application Drawing and datasheet Rev. 6.0.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCZ33903BD3EK, MCZ33903CD3EK provides native 5.0 V MCU supply and matches "C" revision timing specs; versus MCZ33905CD3EK, it omits VAUX and uses smaller 32-pin footprint - making it optimal for space-constrained, single-rail body electronics.

Availability

MCZ33903CD3EK is available at Aetrix Electronics and suitable for body control modules, door modules, seat modules, and lighting control modules requiring stable component supply, automotive qualification, and long-term lifecycle support.

Supply support for MCZ33903CD3EK 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 expertise in SMARTMOS analog-power integration.

The MC33903 family is part of NXP's System Basis Chip portfolio, engineered specifically for automotive electronic control units needing integrated power regulation, high-speed CAN, and LIN communication - targeting body, safety, and powertrain domains.

FAQ

What is the maximum output current of the VDD regulator in MCZ33903CD3EK?

The MCZ33903CD3EK provides a fixed 5.0 V VDD output rated for up to 150 mA. Unlike "D" variants with optional external ballast support, this variant does not support external PNP transistor augmentation - the 150 mA limit is absolute and internally enforced. This rating is sufficient for S12x, S08x, and comparable automotive MCUs in body electronics applications.

Does MCZ33903CD3EK support both LIN and CAN simultaneously?

Yes, MCZ33903CD3EK integrates one high-speed CAN interface (ISO 11898-2/5) and two independent LIN 2.1/J2602-2 transceivers, all operational concurrently. The device manages arbitration, wake-up, and fail-safe transitions across both buses without MCU intervention - enabling true multi-bus ECU architectures such as door modules communicating with interior LIN slaves while reporting status over CAN to the gateway.

What package type and thermal characteristics does MCZ33903CD3EK use?

MCZ33903CD3EK uses a Pb-free 32-pin SOIC Wide-body package with exposed thermal pad (98ASA10556D). The exposed pad enhances thermal conduction to the PCB, supporting continuous operation at 125 °C ambient when properly mounted on ≥2 oz copper with thermal vias. This package is footprint-compatible with other MC33903 variants but distinct from the 54-pin SOIC used in MC33905 devices.

How does the fail-safe state machine function in MCZ33903CD3EK?

The MCZ33903CD3EK implements a hardware-based fail-safe state machine activated via the SAFE pin. When triggered by undervoltage, overtemperature, or watchdog timeout, it forces defined outputs (e.g., disables VDD, asserts INT, configures LIN/CAN to safe state) without MCU involvement. This behavior is configurable via SPI registers but executes deterministically in hardware - ensuring compliance with ASIL-B functional safety requirements in body control applications.

Can MCZ33903CD3EK monitor battery voltage and report it to the MCU?

Yes, MCZ33903CD3EK includes a high-precision VSUP analog input that continuously monitors battery voltage. This signal is routed through an internal analog multiplexer and made available on the MUX-OUT pin, allowing the host MCU to read VSUP alongside other monitored parameters (e.g., internal temperature, VSENSE) using a single ADC channel - reducing MCU resource usage and simplifying firmware design for battery health diagnostics.