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NXP Semiconductors MCZ33903DS5EKR2
- Part No.:
- MCZ33903DS5EKR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MCZ33903DS5EKR2.pdf
- Description:
- IC INTERFACE SPECIALIZED 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
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Product details
Overview
MCZ33903DS5EKR2 from NXP Semiconductors is a System Basis Chip (SBC) Gen2 integrating high-speed CAN (ISO 11898-2/5), single LIN 2.1 interface, 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.
For engineers reviewing the MCZ33903DS5EKR2 datasheet, MCZ33903DS5EKR2 pinout, MCZ33903DS5EKR2 application, or MCZ33903DS5EKR2 equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-chain support for production-grade automotive embedded systems.
Technical Context
The MCZ33903DS5EKR2 implements a SMARTMOS-based power management architecture with dual-supply inputs (VSUP1/VSUP2), integrated 5.0 V CAN transceiver regulator, and SPI-configurable auxiliary functions. Its fail-safe state machine monitors VDD, RST, watchdog timeout, and bus faults to assert SAFE (active-low) during critical failures.
It supports ISO 11898-5 CAN at baud rates from 40 kb/s to 1.0 Mb/s and LIN 2.1 with master termination on LIN-T1/I/O-2. Wake-up sources include CAN/LIN activity, I/O transitions, SPI messages, and VDD overcurrent detection - all functional in low-power (LP) modes with sub-100 µA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CAN Interface | ISO 11898-2 and -5 compliant; supports 40 kb/s–1.0 Mb/s; includes bus fault diagnostics and fail-safe operation |
| LIN Interface | Single LIN 2.1 channel with programmable master termination on LIN-T1/I/O-2 pin |
| VDD Regulator Output | Fixed 5.0 V ±2%; 250 mA typical output; no external PNP support per datasheet note |
| Operating Temperature | −40 °C to +125 °C ambient; qualified for automotive under AEC-Q100 Grade 1 |
| Low-Power Quiescent Current | <100 µA in LP VDD-ON mode; enables always-on ECU monitoring without battery drain |
| Wake-up Inputs | Three configurable wake-up pins (I/O-0, I/O-1, LIN-T1/I/O-2); each supports edge-triggered or level-sensitive detection |
| SPI Interface | Full-duplex 4-wire SPI (CS/SCLK/MOSI/MISO); supports register read/write, status flag polling, and cyclic INT during LP modes |
Pinout & Package
MCZ33903DS5EKR2 uses a 32-pin SOIC exposed pad package (SOT1762-2), footprint-compatible with other MC33903 variants including MC33903D, MC33903S, and MC33903P. Thermal pad must be soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP | Battery Supply Input | Main input for internal regulators and power-on reset; rated −0.3 V to 28 V DC, 40 V transient |
| VDD | MCU Power Output | 5.0 V ±2% regulated output; supplies microcontroller core logic; no external PNP support |
| CANH / CANL | CAN Bus Physical Interface | Differential high-speed CAN outputs; compliant with ISO 11898-2/5; integrated bus fault protection |
| LIN-T1 / I/O-2 | Configurable I/O or LIN Termination | Programmable as LIN master termination resistor driver or HS output/wake-up input; supports cyclic sense in LP mode |
| I/O-0 / I/O-1 | General-Purpose I/O | Bi-directional pins with wake-up capability; readable via SPI and MUX-OUT; support HS/LS drive in LP mode |
| SAFE | Failsafe Alert Output | Open-drain active-low output asserted on VDD undervoltage, watchdog timeout, RST fault, or CAN/LIN bus failure |
| MUX-OUT | Analog Monitoring Output | Multiplexed analog output for VDD, VSUP, temperature, or current sense; selectable via SPI register |
| CS / SCLK / MOSI / MISO | SPI Interface | 4-wire serial interface for configuration, diagnostics, and status reporting; CS transition wakes device from LP VDD-ON |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN Transceiver Regulator | Embedded 5.0 V regulator dedicated to CAN driver; fully protected against overvoltage, overtemperature, and short-circuit |
| Multi-Source Wake-up Capability | Supports wake-up from CAN/LIN bus activity, I/O transitions, SPI message, timer expiry, and VDD overcurrent - all in LP modes |
| Fail-Safe State Machine | Hardware-enforced safety logic that asserts SAFE pin on detected faults (e.g., missing watchdog refresh, VDD collapse, RST pin anomaly) |
| Configurable Analog Monitoring | MUX-OUT pin provides selectable access to internal VDD, VSUP, die temperature, and current-sense signals via SPI control |
| Flexible LIN Master Termination | LIN-T1/I/O-2 pin supports integrated 1 kΩ pull-up for LIN bus termination or reconfigures as high-side switch/wake-up input |
Applications
| Automotive Body Control Module (BCM) | Engine Control Unit (ECU) Subsystem |
|---|---|
|
Use Scenario: Centralized power and communication management for door modules, lighting, and HVAC actuators in 12 V vehicle architectures. IC Role / Device Role / Timing Role: SBC providing regulated 5.0 V MCU supply, CAN physical layer interface, LIN slave coordination, and wake-up supervision. Use Value: Reduces BOM count by integrating CAN transceiver regulator, wake-up logic, and diagnostics - eliminating discrete LDOs and discrete wake-up comparators. |
Use Scenario: Secondary power management node in engine bay ECUs requiring robust CAN connectivity and fault-resilient operation during cranking. IC Role / Device Role / Timing Role: Power supervisor and communication interface co-located with main MCU; monitors VSUP during cold-crank (down to 4.5 V) and asserts SAFE on brownout. Use Value: Enables safe shutdown and recovery via hardware-level fail-safe signaling - independent of firmware execution state. |
| Industrial Motor Drive Controller | Off-Highway Vehicle Telematics Node |
|
Use Scenario: Power and bus interface for brushless DC motor controllers in agricultural or construction equipment with CAN-based command and LIN-sensed feedback. IC Role / Device Role / Timing Role: System basis chip delivering stable 5.0 V MCU rail, isolated CAN communication, and LIN-connected sensor interface with wake-up on motor start request. Use Value: Supports diagnostic logging and fault injection testing via SPI-accessible registers - enabling ISO 26262 ASIL-B ready system design. |
Use Scenario: Telematics gateway module in tractors or harvesters requiring always-on GPS/cellular connectivity with low-quiescent-current wake-up from CAN/LIN events. IC Role / Device Role / Timing Role: Low-power SBC managing MCU sleep/wake cycles, monitoring battery voltage (via VSENSE), and asserting SAFE on battery disconnect or overvoltage. Use Value: Achieves <100 µA standby current in LP VDD-ON mode - extending battery life during multi-week field deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar System Basis Chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCZ33903DD5EK/R2 | Dual-LIN variant (2x LIN 2.1 interfaces); same 5.0 V VDD, identical SOIC-32 SOT1762-2 package | Required where two independent LIN buses (e.g., body + chassis networks) must be managed from one SBC | Select MCZ33903DD5EK/R2 only if dual-LIN topology is needed; otherwise MCZ33903DS5EKR2 reduces routing complexity and cost |
| MCZ33903DP5EK/R2 | No LIN interface; adds third wake-up input (I/O-2); retains same 5.0 V VDD and SOIC-32 SOT1762-2 package | Suitable for CAN-only nodes requiring maximum wake-up flexibility (e.g., remote sensor hubs with multiple digital inputs) | Choose MCZ33903DP5EK/R2 when LIN is unnecessary and additional wake-up I/O outweighs loss of LIN bus control |
Compared with MCZ33903DD5EK/R2 and MCZ33903DP5EK/R2, MCZ33903DS5EKR2 uniquely balances single-LIN functionality with three wake-up-capable I/Os - optimizing pin utilization for mid-tier automotive ECUs where LIN expansion is optional but wake-up versatility is critical.
Availability
MCZ33903DS5EKR2 is available at Aetrix Electronics and suitable for automotive body control modules, engine control subsystems, industrial motor drives, and off-highway telematics nodes requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MCZ33903DS5EKR2 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.
The MC33903 family is part of NXP's System Basis Chip portfolio, designed specifically for automotive electronic control units requiring integrated power management, CAN/LIN communication, and hardware-level functional safety features.
FAQ
What is the primary function of MCZ33903DS5EKR2 in an automotive ECU?
The MCZ33903DS5EKR2 serves as a System Basis Chip that integrates power regulation (5.0 V MCU supply), high-speed CAN physical layer, single LIN 2.1 interface, wake-up logic, and fail-safe monitoring into one device. It replaces discrete regulators, CAN transceivers, and supervisory circuits - reducing board space and improving reliability in automotive ECUs such as body control modules and engine subsystems. The MCZ33903DS5EKR2 is engineered for direct integration with microcontrollers in harsh automotive environments.
Does MCZ33903DS5EKR2 support external PNP transistor augmentation for its VDD regulator?
No, MCZ33903DS5EKR2 does not support external PNP transistor augmentation for its VDD regulator. Unlike some earlier SBC variants, the datasheet explicitly states "VDD does not allow usage of an external PNP on the 33903" (Table 3, Note 2). Its 5.0 V output is fixed and self-contained, rated for up to 250 mA continuous load without external pass devices. This simplifies layout but limits peak current capability compared to PNP-augmented versions like MC33905.
How many wake-up sources does MCZ33903DS5EKR2 support, and which pins are configurable for wake-up?
The MCZ33903DS5EKR2 supports three dedicated wake-up sources: I/O-0, I/O-1, and LIN-T1/I/O-2. All three pins can be configured as wake-up inputs in low-power (LP) modes, responding to edge transitions or level changes. Additionally, wake-up can be triggered by CAN bus activity, LIN bus activity, SPI message reception, automatic timer expiry, or VDD overcurrent detection - giving designers flexible, multi-domain wake-up strategies without external circuitry.
What is the role of the SAFE pin on MCZ33903DS5EKR2, and under what conditions is it asserted?
The SAFE pin on MCZ33903DS5EKR2 is an open-drain, active-low output that signals critical system faults. It is asserted (driven LOW) during hardware-detected failures including VDD undervoltage, watchdog timeout, RST pin malfunction, CAN bus short-to-battery or short-to-ground, or LIN bus fault conditions. The assertion is handled entirely by the internal fail-safe state machine - independent of firmware - ensuring deterministic response even during MCU lockup. This makes the SAFE signal essential for ASIL-B–capable system designs.
Is MCZ33903DS5EKR2 pin-compatible with other members of the MC33903 family?
Yes, MCZ33903DS5EKR2 is pin-compatible with MCZ33903DD5EK/R2, MCZ33903DP5EK/R2, and MCZ33903DS3EK/R2 - all use the same 32-pin SOIC exposed pad package (SOT1762-2) and share identical pin assignments for VSUP, VDD, CANH/CANL, SPI, SAFE, INT, RST, and I/O-0/I/O-1. This allows seamless migration between single-LIN, dual-LIN, and LIN-free variants without PCB redesign - a key advantage for scalable ECU platform development.
MCZ33903DS5EKR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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
MCZ33903DS5EKR2 FAQ
1.How can I place an order for MCZ33903DS5EKR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MCZ33903DS5EKR2 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 MCZ33903DS5EKR2 reliable?
The price and inventory of MCZ33903DS5EKR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCZ33903DS5EKR2 is usually 5 days.
3.What payment methods are accepted for MCZ33903DS5EKR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCZ33903DS5EKR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCZ33903DS5EKR2?
MCZ33903DS5EKR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCZ33903DS5EKR2 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 MCZ33903DS5EKR2?
For technical support, including MCZ33903DS5EKR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCZ33903DS5EKR2 requirements.
6.How does Aetrix verify that MCZ33903DS5EKR2 is sourced from the original manufacturer or authorized distributors?
All MCZ33903DS5EKR2 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 MCZ33903DS5EKR2 meets industry standards.
7.What is the process for return or replacement of MCZ33903DS5EKR2?
All MCZ33903DS5EKR2 units undergo pre-shipment inspection (PSI). If there is an issue with MCZ33903DS5EKR2, 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 MCZ33903DS5EKR2 part is unused and in its original packaging.
Return procedure for MCZ33903DS5EKR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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