NXP Semiconductors MCZ33903DP3EKR2

Overview

MCZ33903DP3EKR2 from NXP Semiconductors is a System Basis Chip (SBC) Gen2 integrating high-speed CAN (ISO 11898-2/5), 3.3 V MCU power regulator, three wake-up inputs, and fail-safe state machine - designed for automotive ECU power management in battery-supplied systems with diagnostics and low-power operation.

For engineers reviewing the MCZ33903DP3EKR2 datasheet, MCZ33903DP3EKR2 pinout, MCZ33903DP3EKR2 application, or MCZ33903DP3EKR2 equivalent, this device serves as a compact, diagnostic-rich SBC for CAN-based ECUs requiring robust supply regulation, bus wake-up, and safe-state control under cranking and transient conditions.

Technical Context

The MCZ33903DP3EKR2 implements a SMARTMOS-based power management architecture with dual-supply inputs (VSUP1/VSUP2 internally connected), a 3.3 V VDD regulator (non-PNP extendable), and an embedded 5 V-CAN transceiver compliant with ISO 11898-5 up to 1 Mb/s. It supports LP modes with ultra-low quiescent current and multiple wake-up sources including CAN bus activity, I/O transitions, and SPI messages.

Its fail-safe state machine monitors VDD, RST, watchdog timeout, and critical pin states, asserting the open-drain SAFE pin low on fault. The device lacks LIN interfaces and VAUX/VSENSE/MUX-OUT functionality - confirmed by Table 3 and Figure 12 for the DP variant - distinguishing it from DS/DD/P5 variants.

Key Specifications

Pinout & Package

MCZ33903DP3EKR2 uses a 32-pin SOIC exposed pad package (SOT1762-2), footprint-compatible with other MC33903 variants. Pin assignments are validated per Figure 12 and Table 4 of Rev. 15.0 datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCZ33903DP5EKR2 and MCZ33903DS3EKR2, the MCZ33903DP3EKR2 offers minimal BOM cost and layout simplicity for pure CAN-based 3.3 V ECUs - trading LIN capability and 5 V flexibility for lower component count and guaranteed 3.3 V compatibility.

Availability

MCZ33903DP3EKR2 is available at Aetrix Electronics and suitable for automotive body control modules, door modules, seat control units, and roof modules requiring stable component supply across extended temperature and harsh electrical environments.

Supply support for MCZ33903DP3EKR2 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.

The MC33903 family is part of NXP's System Basis Chip portfolio, engineered specifically for automotive electronic control units needing integrated power management, CAN/LIN interfaces, and functional safety-aware diagnostics.

FAQ

What is the primary function of the MCZ33903DP3EKR2 in an automotive ECU?

The MCZ33903DP3EKR2 serves as a System Basis Chip (SBC) that integrates a 3.3 V MCU power regulator, ISO 11898-5 high-speed CAN transceiver, three wake-up inputs, and a fail-safe state machine. In an automotive ECU, the MCZ33903DP3EKR2 manages power sequencing, enables CAN communication, detects wake events, and asserts the SAFE pin during faults - all within a single 32-pin SOIC package.

Does the MCZ33903DP3EKR2 support LIN communication?

No, the MCZ33903DP3EKR2 does not include any LIN interface. Per Table 3 and Figure 12 of the Rev. 15.0 datasheet, the "DP" variant is defined as having zero LIN channels. Its pinout omits LIN-T1, LIN-T2, RXD-L1, TXD-L1, and related signals - confirming it is a CAN-only SBC optimized for cost-sensitive, LIN-free ECUs.

Can an external PNP transistor be used to increase the current capability of the VDD regulator in the MCZ33903DP3EKR2?

No. The datasheet explicitly states in Table 3 footnote 2: "VDD does not allow usage of an external PNP on the 33903." This applies to all MC33903 variants, including the MCZ33903DP3EKR2. The 3.3 V VDD regulator is self-contained with internal current limiting and thermal protection, and no VE or VB pins are routed for external pass transistor support in this variant.

What wake-up sources are available in low-power mode for the MCZ33903DP3EKR2?

The MCZ33903DP3EKR2 supports three dedicated wake-up inputs (I/O-0, I/O-2, I/O-3), all configurable as digital inputs in LP mode. It also supports wake-up via CAN bus activity (RXD/CANH/CANL transitions), SPI chip select (CS) edge, and internal timer - but not LIN or VDD overcurrent, as those require LIN-capable or VAUX-equipped variants.

Is the MCZ33903DP3EKR2 pin-compatible with other MC33903 variants in the same package?

Yes - the MCZ33903DP3EKR2 uses the SOT1762-2 32-pin SOIC exposed pad package and shares identical pinout with MCZ33903DS3EKR2, MCZ33903DS5EKR2, and MCZ33903DP5EKR2. All share VSUP, VDD, CANH/CANL, SAFE, RST, INT, SPI, and I/O-0/I/O-2/I/O-3 assignments; differences lie only in internal feature enablement (e.g., LIN, VSENSE, MUX-OUT), not pin function or placement.