NXP Semiconductors MCZ33903CS5EKR2

Overview

MCZ33903CS5EKR2 from NXP (formerly Freescale) is a second-generation System Basis Chip (SBC) designed as an automotive power management and communication interface unit for MCU-based ECUs in body, safety, and powertrain systems. It integrates a 5.0 V/150 mA MCU voltage regulator (VDD), high-speed CAN transceiver (ISO 11898-2/-5 compliant), single LIN 2.1/J2602-2 interface, fail-safe state machine, secured SPI with watchdog, and 3 configurable wake-up I/O pins. It operates across 5.5–28 V input and supports -40 °C to +125 °C ambient temperature.

For engineers reviewing the MCZ33903CS5EKR2 datasheet, MCZ33903CS5EKR2 pinout, MCZ33903CS5EKR2 application, or MCZ33903CS5EKR2 equivalent, key selection considerations include its 5.0 V VDD output without external ballast support, single-LIN capability, absence of VAUX/VSENSE/MUX features, SOIC-32 exposed-pad package, and suitability for cost-optimized gateways or lighting modules requiring robust CAN+LIN coexistence and ultra-low sleep current (15 µA).

Technical Context

The MCZ33903CS5EKR2 implements a dedicated 5.0 V linear regulator for MCU supply (150 mA max, no external PNP support), an internal 5.0 V CAN driver supply (VCAN), and a single LIN 2.1 physical layer with master terminal output. Its fail-safe state machine is hardware-configurable via SAFE pin assertion and linked to cranking pulse management during low-VDD conditions.

It supports cyclic wake-up sensing and ultra-low-power sleep mode (15 µA with VDD OFF), includes secured SPI with parity and window timeout watchdog, and provides high-precision VSUP monitoring - but excludes VAUX, VSENSE, and analog MUX functionality present in higher-tier variants like MC33904/33905.

Key Specifications

Pinout & Package

MCZ33903CS5EKR2 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. Pin count and layout match the MC33903 family baseline, enabling board-level compatibility within the Gen2 SBC portfolio.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar system basis chip applications.

Compared with MCZ33903CS5EKR2, MCZ33904B5EK/R2 adds analog monitoring and auxiliary regulation at identical pin count, while MCZ33905BS5EK/R2 enables higher MCU current and retains full feature set - both extend platform flexibility where MCZ33903CS5EKR2's minimal feature set suffices for cost-sensitive nodes.

Availability

MCZ33903CS5EKR2 is available at Aetrix Electronics and suitable for body controller modules, lighting control units, door modules, and seat modules requiring stable component supply across automotive production lifecycles.

Supply support for MCZ33903CS5EKR2 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 leader in automotive semiconductor solutions, with over 25 years of expertise in SMARTMOS analog-power-digital integration for harsh-environment applications.

The MC33903 family was engineered as a Gen2 System Basis Chip targeting cost-optimized, CAN+LIN-enabled ECUs in body electronics - prioritizing ultra-low quiescent current, fail-safe operation, and simplified design-in over feature expansion.

FAQ

What is the maximum output current of the VDD regulator in MCZ33903CS5EKR2?

The MCZ33903CS5EKR2 provides a fixed 5.0 V VDD output rated for 150 mA continuous current. Unlike MC33904 or MC33905 variants, it does not support external ballast transistor implementation - so current scalability beyond 150 mA is not possible with this specific part. This makes MCZ33903CS5EKR2 ideal for mid-tier MCUs such as S12x or S08x in non-power-intensive applications.

Does MCZ33903CS5EKR2 support LIN transceiver functionality?

Yes, MCZ33903CS5EKR2 integrates a single LIN 2.1/J2602-2 compliant transceiver with master terminal output (LIN-T). It supports standard data rates from 10.4 kB/s to 20 kB/s and fast-mode operation up to 100 kB/s. The LIN interface is fully hardware-managed and requires no external components for basic bus termination, simplifying node design in lighting or door modules.

Is MCZ33903CS5EKR2 qualified for automotive temperature ranges?

Yes, MCZ33903CS5EKR2 is specified for operation from -40 °C to +125 °C ambient temperature and qualified per AEC-Q100 Grade 1 requirements. Its thermal design leverages the SOIC-32 exposed pad package to sustain reliability in under-dash and door cavity environments - making it suitable for body electronics deployed outside the engine compartment.

What fail-safe mechanisms does MCZ33903CS5EKR2 implement?

MCZ33903CS5EKR2 incorporates a hardware-configurable fail-safe state machine tied to the SAFE pin output. During supply faults, overtemperature, or watchdog timeouts, it asserts SAFE to signal MCU reset or initiate safe-state transitions. It also features cranking pulse management that preserves CAN/LIN wake-up capability down to 5.5 V - eliminating need for external hold-up capacitance.

How does MCZ33903CS5EKR2 achieve ultra-low sleep current?

MCZ33903CS5EKR2 achieves 15 µA typical sleep current (VDD OFF) through integrated low-leakage circuitry, selective clock gating, and optimized state retention in its fail-safe controller. Both CAN and LIN wake-up channels remain active in this mode, enabling immediate network responsiveness without compromising battery drain - critical for always-on vehicle subsystems like intrusion detection or remote keyless entry receivers.