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NXP Semiconductors MCZ33903DD5EK
- Part No.:
- MCZ33903DD5EK
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MCZ33903DD5EK.pdf
- Description:
- IC INTERFACE SPECIALIZED 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,774
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Product details
Overview
MCZ33903DD5EK from NXP Semiconductors is a second-generation System Basis Chip (SBC) integrating high-speed CAN (ISO 11898-2/5), dual LIN 2.1 interfaces, 5.0 V MCU supply regulator, fail-safe state machine, and four configurable wake-up/I/O pins. It operates across –40 °C to +125 °C and targets automotive ECU power management with diagnostics and bus protection.
For engineers reviewing the MCZ33903DD5EK datasheet, MCZ33903DD5EK pinout, MCZ33903DD5EK application, or MCZ33903DD5EK equivalent, this device delivers integrated CAN/LIN communication, multi-rail power regulation, cyclic sense diagnostics, and robust fault detection for safety-critical vehicle control modules.
Technical Context
The MCZ33903DD5EK implements a SMARTMOS-based fail-safe state machine with dedicated SAFE output, supports ISO 11898-5 CAN at baud rates from 40 kb/s to 1.0 Mb/s, and includes two LIN transceivers with programmable termination pins (LIN-T1/I/O-2 and LIN-T2/I/O-3). Its SPI interface enables full register-level control of diagnostics, mode transitions, and analog monitoring via MUX-OUT.
It features three independent voltage regulators: 5.0 V VDD for MCU, embedded 5.0 V CAN driver supply, and configurable auxiliary 5.0/3.3 V VAUX - all with undervoltage detection, overcurrent protection, and thermal monitoring. LP modes achieve ultra-low quiescent current while retaining CAN/LIN bus wake-up, I/O transition, SPI message, and timer-based wake sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CAN Interface | ISO 11898-2 and -5 compliant; supports 40 kb/s–1.0 Mb/s baud rates with bus failure diagnostics and fail-safe operation. |
| LIN Interfaces | Dual LIN 2.1 channels with integrated transceivers and programmable master termination on LIN-T1/I/O-2 and LIN-T2/I/O-3 pins. |
| VDD Output | 5.0 V ±2% regulated output (fixed for MCZ33903DD5EK); supplies MCU core logic with UVLO, OCP, and thermal shutdown. |
| Operating Temperature | –40 °C to +125 °C ambient; qualified for automotive underhood and ECU applications per AEC-Q100. |
| Supply Voltage Range | VSUP1/VSUP2: –0.3 V to 28 V DC (40 V transient); supports 12 V and 24 V battery systems with load-dump resilience. |
| Low-Power Modes | Multiple LP states with <100 µA typical quiescent current; retains CAN/LIN bus wake-up, I/O edge detection, and SPI-triggered wake capability. |
| Diagnostic Coverage | Integrated VDD, VSUP, CANH/CANL, LIN bus, temperature, and watchdog diagnostics reported via SPI flags and SAFE pin assertion. |
Pinout & Package
MCZ33903DD5EK uses a 32-pin SOIC exposed pad package (SOT1762-2), footprint-compatible with other MC33903 variants including MC33903S and MC33903P. The lead frame is internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP/1 & VSUP2 | Battery Input Supply | Internally connected inputs for main power rail; accept –0.3 V to 28 V (40 V transient) for 12/24 V automotive systems. |
| LIN-T1 / I/O-2 & LIN-T2 / I/O-3 | Configurable I/O or LIN Termination | Programmable as high-side switch outputs or LIN master node termination resistors; support wake-up input in LP mode. |
| SAFE | Fault Indicator Output | Open-drain active-low output asserted during VDD undervoltage, watchdog timeout, RST fault, or critical internal error. |
| MUX-OUT | Analog Multiplexed Output | Connects to MCU ADC; selects internal signals (VDD, VSUP, temperature, current sense) via SPI for real-time system monitoring. |
| I/O-0 & I/O-1 | Configurable Wake-Up/Driver Pins | Support cyclic sense diagnostics in LP mode; readable via SPI/MUX-OUT; usable as HS/LS drivers for small loads or wake sources. |
| CANH / CANL / SPLIT | CAN Physical Layer Interface | Direct connection to differential CAN bus; SPLIT provides midpoint reference for split-termination topology per ISO 11898-2. |
| RXD / TXD | CAN Logic Interface | CMOS-level digital interface between MCU and embedded CAN transceiver; includes internal pull-up on TXD. |
| CS / SCLK / MOSI / MISO | SPI Control Interface | Full-duplex serial interface for configuration, status readback, register access, and diagnostic flag polling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual LIN 2.1 Transceivers | Integrated LIN physical layer with programmable termination and bus fault detection - eliminates external LIN transceivers and reduces BOM count. |
| Fail-Safe State Machine | Dedicated hardware state controller that asserts SAFE pin on critical faults (e.g., watchdog stall, VDD collapse, RST anomaly) without MCU intervention. |
| Cyclic Sense Diagnostics | Automated periodic measurement of VDD, VSUP, temperature, and current via MUX-OUT during low-power modes - enables predictive health monitoring. |
| Multi-Rail Power Regulation | Three independent regulators: 5.0 V VDD (MCU), 5.0 V 5V-CAN (CAN driver), and configurable VAUX - each with UVLO, OCP, and thermal protection. |
| Robust Wake-Up Architecture | Four configurable wake sources: CAN/LIN bus activity, I/O edge transitions, SPI message reception, and automatic timer - ensures reliable system responsiveness. |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) |
|---|---|
|
Use Scenario: Centralized power and communication management for door locks, lighting, HVAC actuators, and window motors in modern vehicles. IC Role / Device Role / Timing Role: SBC providing regulated 5.0 V MCU supply, dual LIN for sensor/actuator networks, and high-speed CAN for gateway communication. Use Value: Reduces component count by integrating CAN/LIN transceivers, regulators, and diagnostics - simplifying PCB layout and improving system reliability. |
Use Scenario: Power management and bus interfacing for engine timing, fuel injection, and emissions control subsystems operating under harsh thermal conditions. IC Role / Device Role / Timing Role: Fail-safe power supervisor with ISO 11898-5 CAN interface and cyclic diagnostics for real-time engine parameter monitoring. Use Value: Enables deterministic LP mode entry/exit with bus wake-up and SAFE pin-driven fault containment - meeting ASIL-B functional safety requirements. |
| Advanced Driver Assistance Systems (ADAS) Sensor Hub | Electric Power Steering (EPS) Module |
|
Use Scenario: Consolidating power and communication for radar, camera, and ultrasonic sensors in ADAS domain controllers. IC Role / Device Role / Timing Role: Dual-LIN master for sensor clusters and high-speed CAN for fusion processor interface; MUX-OUT enables voltage/current telemetry. Use Value: Supports ASIL-B diagnostics coverage via integrated VDD/VSUP/temperature monitoring and fail-safe SAFE output assertion on fault detection. |
Use Scenario: Power and bus management for torque-sensing, motor control, and feedback loops in steer-by-wire EPS systems. IC Role / Device Role / Timing Role: Regulated 5.0 V supply for MCU and position sensors; dual LIN for motor driver and torque sensor communication; CAN for vehicle network integration. Use Value: Delivers ultra-low quiescent current in standby while maintaining fast wake-up latency (<100 µs) - critical for energy-efficient EPS operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar System Basis Chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCZ33903DS5EK/R2 | Single LIN 2.1 interface; identical 5.0 V VDD, package, and LP mode performance. | Reduced LIN channel count limits use to simpler ECUs with only one LIN subnetwork. | Select when dual-LIN functionality is unnecessary - lowers cost and simplifies routing without sacrificing power or CAN capability. |
| MCZ33904D5EK/R2 | No LIN interface; adds VSENSE and MUX-OUT functionality; same 5.0 V VDD, SOIC-32 package, and CAN compliance. | Targeted at CAN-only applications requiring battery voltage sensing and analog monitoring but no LIN bus support. | Choose for gateways or body modules needing enhanced analog diagnostics but no LIN connectivity - retains full CAN and power features. |
Compared with MCZ33903DS5EK/R2 and MCZ33904D5EK/R2, the MCZ33903DD5EK uniquely delivers dual-LIN transceivers alongside full CAN, diagnostics, and fail-safe operation in the same 32-pin SOIC footprint - making it optimal for complex automotive ECUs requiring multiple distributed LIN subnetworks.
Availability
MCZ33903DD5EK is available at Aetrix Electronics and suitable for automotive electronic control units, advanced driver assistance systems (ADAS), and electric power steering modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MCZ33903DD5EK 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 automotive-grade mixed-signal ICs and functional safety design.
The MCZ33903DD5EK belongs to NXP's System Basis Chip Gen2 family, engineered specifically for automotive ECU power management, communication integration, and ASIL-B–capable diagnostics in demanding under-hood environments.
FAQ
What is the primary function of the MCZ33903DD5EK in an automotive ECU?
The MCZ33903DD5EK serves as a System Basis Chip that integrates power regulation (5.0 V VDD for MCU), high-speed CAN (ISO 11898-2/5), dual LIN 2.1 interfaces, fail-safe monitoring, and diagnostics into a single 32-pin SOIC package. It replaces discrete regulators, transceivers, and supervisory circuits - reducing board space and improving system-level reliability in automotive ECUs.
Does the MCZ33903DD5EK support both 3.3 V and 5.0 V VDD output configurations?
No - the MCZ33903DD5EK is factory-configured for fixed 5.0 V VDD output. While the broader MC33903 family includes 3.3 V variants (e.g., MCZ33903DD3EK/R2), the "D5" suffix in MCZ33903DD5EK explicitly denotes the 5.0 V version. External PNP extension is not supported for VDD on this part.
How does the SAFE pin operate on the MCZ33903DD5EK?
The SAFE pin on the MCZ33903DD5EK is an open-drain, active-low output that asserts LOW during critical fault conditions - including VDD undervoltage, watchdog timeout, RST pin malfunction, or internal state machine errors. It provides hardware-level fault signaling independent of MCU software execution, enabling immediate system-level fail-safe response.
Can the LIN-T1 and LIN-T2 pins on the MCZ33903DD5EK be used as general-purpose I/Os?
Yes - LIN-T1 (Pin 7) and LIN-T2 (Pin 6) on the MCZ33903DD5EK are configurable as either LIN master termination outputs or high-side switch I/Os. In I/O mode, they support programmable wake-up input in low-power modes and can drive small external loads, though overtemperature protection is not implemented in HS output mode.
What diagnostic capabilities does the MCZ33903DD5EK provide through its MUX-OUT pin?
The MUX-OUT pin on the MCZ33903DD5EK allows multiplexed readback of internal analog signals - including VDD, VSUP, die temperature, and VDD current sense - selected via SPI register writes. This enables real-time health monitoring without additional external sensors, supporting predictive maintenance and ASIL-B diagnostic coverage requirements.
MCZ33903DD5EK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- System Basis Chip
- Interface:
- CAN, LIN
- Voltage - Supply:
- 5.5V ~ 28V
- Supplier Device Package:
- 32-SSOP-EP
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
MCZ33903DD5EK FAQ
1.How can I place an order for MCZ33903DD5EK through Aetrix?
Please submit a Request for Quotation (RFQ) for MCZ33903DD5EK on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MCZ33903DD5EK reliable?
The price and inventory of MCZ33903DD5EK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCZ33903DD5EK is usually 5 days.
3.What payment methods are accepted for MCZ33903DD5EK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCZ33903DD5EK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCZ33903DD5EK?
MCZ33903DD5EK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCZ33903DD5EK order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MCZ33903DD5EK?
For technical support, including MCZ33903DD5EK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCZ33903DD5EK requirements.
6.How does Aetrix verify that MCZ33903DD5EK is sourced from the original manufacturer or authorized distributors?
All MCZ33903DD5EK products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCZ33903DD5EK meets industry standards.
7.What is the process for return or replacement of MCZ33903DD5EK?
All MCZ33903DD5EK units undergo pre-shipment inspection (PSI). If there is an issue with MCZ33903DD5EK, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MCZ33903DD5EK part is unused and in its original packaging.
Return procedure for MCZ33903DD5EK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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