NXP Semiconductors MCZ33903CP5EK

Overview

MCZ33903CP5EK from NXP (formerly Freescale) is an automotive System Basis Chip (SBC) integrating a 5.0 V/150 mA MCU voltage regulator, high-speed CAN transceiver (ISO 11898-2/5 compliant), and three configurable wake-up inputs - with no LIN interface. It delivers fail-safe state machine control, secured SPI with watchdog, and ultra-low 15 µA sleep current for body electronics modules requiring robust power management and network diagnostics.

For engineers reviewing the MCZ33903CP5EK datasheet, MCZ33903CP5EK pinout, MCZ33903CP5EK application, or MCZ33903CP5EK equivalent, key selection criteria include its 5.0 V VDD output without external ballast support, absence of LIN, SOIC-32EP package, VSUP sense monitoring, and wake-up I/O flexibility in automotive ECU designs.

Technical Context

The MCZ33903CP5EK implements a dedicated 5.0 V internal CAN regulator (5 V-CAN), a fail-safe state machine linked to the SAFE pin, and secured SPI with parity checking and windowed timeout capability. Its cranking pulse management maintains partial functionality during battery dips down to 5.5 V, while analog multiplexing supports VSUP sensing and optional external signal monitoring.

Unlike MC33903D/S variants, MCZ33903CP5EK omits VAUX, VSENSE, and MUX features but retains full VSUP1/VSUP2 monitoring and LIN-free wake-up I/O configuration (3 wake-up inputs). It operates across −40 °C to +125 °C and withstands 40 V load dump per ISO 7637-2.

Key Specifications

Pinout & Package

MCZ33903CP5EK is housed in a Pb-free 32-pin SOIC wide-body package with exposed thermal pad (suffix EK), optimized for automotive thermal and mechanical reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCZ33903CP5EK, MCZ33903B5EK improves oscillator accuracy and startup behavior while retaining identical pinout and core functionality; MCZ33904C5EK expands I/O and analog monitoring at the cost of increased complexity and BOM count - both serve distinct platform scalability needs.

Availability

MCZ33903CP5EK is available at Aetrix Electronics and suitable for body controllers, door modules, seat modules, and lighting control modules requiring stable component supply, automotive qualification, and long-term lifecycle support.

Supply support for MCZ33903CP5EK 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 family is part of NXP's System Basis Chip Gen2 portfolio, designed specifically for automotive electronic control units needing integrated power regulation, CAN communication, and fail-safe supervision - targeting body, safety, and powertrain domains.

FAQ

What is the maximum output current of the VDD regulator in MCZ33903CP5EK?

The MCZ33903CP5EK provides a fixed 5.0 V VDD output rated for up to 150 mA continuous current. Unlike variants with external ballast support (e.g., MC33903D), this part does not support external PNP transistor augmentation - the 150 mA limit is internal and non-expandable. This rating is sufficient for most S12x and entry-level MPC560x microcontrollers in body electronics applications.

Does MCZ33903CP5EK include a LIN transceiver?

No, MCZ33903CP5EK does not include any LIN transceiver functionality. It belongs to the LIN-free variant of the MC33903 family. The "P" suffix explicitly denotes zero LIN interfaces - confirmed by Freescale documentation showing "0" under LIN interface(s) for MC33903P. All LIN-related pins (LIN-1, LIN-2, TXD-L1, etc.) are unconnected and unused in this device.

What wake-up capabilities does MCZ33903CP5EK support?

MCZ33903CP5EK supports exactly three configurable wake-up inputs (I/O-0, I/O-1, I/O-2), each capable of edge-triggered wake-up from sleep mode. These pins may also be configured as general-purpose outputs during active operation. No LIN or CAN bus activity triggers wake-up in this variant - only direct pin assertion or VSUP threshold crossing initiates wake-up.

Is MCZ33903CP5EK compatible with the MCZ33903B5EK pinout?

Yes, MCZ33903CP5EK is pin-compatible with MCZ33903B5EK - both use the same SOIC-32EP package with identical pin numbering and function mapping. The "B" and "C" suffixes denote different silicon revisions (B = improved oscillator, cranking response, and current consumption), not pinout changes. PCBs designed for MCZ33903B5EK can accept MCZ33903CP5EK without modification.

What is the purpose of the SAFE pin on MCZ33903CP5EK?

The SAFE pin on MCZ33903CP5EK is an open-drain output driven low by the internal fail-safe state machine during detected fault conditions - such as overtemperature, undervoltage, or watchdog timeout. It connects directly to the MCU's reset or NMI input to enforce controlled shutdown or recovery. Its behavior is hardware-defined and requires no firmware configuration, simplifying functional safety implementation in ASIL-B systems.