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NXP Semiconductors MC33742DW
- Part No.:
- MC33742DW
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC33742DW.pdf
- Description:
- IC INTERFACE SPECIALIZED 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,976
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Product details
Overview
MC33742DW from NXP Semiconductors (formerly Freescale) is an automotive-grade System Basis Chip integrating a 1.0 Mbps high-speed CAN transceiver, a 5.0 V/200 mA LDO regulator with overtemperature prewarning and reset, a programmable window watchdog, four wake-up inputs, SPI interface, and an internal high-side switch (150 mA current-limited). It serves as the central power management and communication interface in automotive ECUs.
For engineers reviewing the MC33742DW datasheet, MC33742DW pinout, MC33742DW application, or MC33742DW equivalent, this page delivers verified technical context, exact pin functions for 28-pin SOICW packaging, automotive-grade electrical specifications (e.g., -40 °C to 125 °C operation, ISO 7637-1 transient immunity), and validated alternative parts for ECU design continuity.
Technical Context
The MC33742DW implements a dual-regulator architecture: a fixed 5.0 V internal LDO (VDD) and a V2 sense/control loop supporting external PNP pass transistor for a second 5.0 V rail. Its state machine supports four operational modes-Normal, Standby, Stop, and Sleep-with sub-100 µA sleep current and configurable wake-up sources (L0–L3, CAN bus, cyclic sense).
Its CAN physical layer complies with ISO 11898-2, provides bus diagnostic capability (CANH/CANL voltage thresholds, short-to-battery/ground detection), and features integrated protection including ±4 kV HBM ESD on HS/Lx/CAN pins and load-dump tolerance up to 40 V on VSUP and CANH/CANL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CAN Data Rate | 1.0 Mbps - Enables full-speed communication in modern automotive networks (e.g., powertrain, chassis domains). |
| VDD Regulator Output | 5.0 V ±50 mV (200 mA max) - Powers MCU core logic with dropout ≤0.5 V at full load, ensuring stable supply under battery sag. |
| SPI Interface Speed | Up to 4.0 MHz - Supports fast configuration and status polling without CPU overhead in real-time ECU control loops. |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood automotive applications per AEC-Q100 Grade 1 requirements. |
| HS Switch Current Limit | 150 mA (typical) - Drives small solenoids, relays, or sensors directly without external driver stage. |
| Supply Current (Sleep Mode) | 55–140 µA - Meets stringent low-power requirements for always-on ECU functions like remote keyless entry wake-up. |
| ESD Robustness (HS/Lx/CAN) | ±4000 V HBM - Protects against handling and assembly ESD events without external TVS diodes. |
Pinout & Package
MC33742DW is packaged in a 28-pin SOICW (wide-body) surface-mount package (98ASB42345B), thermally enhanced with internal lead-frame grounding for PCB heat dissipation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| RXD / TXD | CAN Bus Interface | Direct connection to CAN controller's RX/TX lines; RXD is push-pull output, TXD is CMOS input with hysteresis. |
| VDD | Main Digital Supply | 5.0 V regulated output powering MCU core; includes reset assertion and overtemperature prewarning flags. |
| RST | Active-Low Reset Output | Drives MCU reset line with internal pull-up to VDD; asserted for 15 ms during power-up or VDD undervoltage. |
| INT / WDOG | Interrupt & Watchdog Outputs | Push-pull active-low signals: INT indicates enabled event (e.g., wake-up, fault); WDOG asserts if SPI watchdog not refreshed. |
| V2 / V2CTRL | External Regulator Control | V2 is sense input; V2CTRL drives base of external PNP transistor to generate second 5.0 V rail for CAN transceiver or peripherals. |
| HS | High-Side Driver Output | Internally current-limited (150 mA) switch referenced to VSUP; used for controlled power enable of auxiliary circuits. |
| L0–L3 | Wake-Up Inputs | Four independent level-sensitive inputs with programmable thresholds (2.0–4.7 V) for switch or sensor wake-up detection. |
| CANH / CANL | CAN Physical Layer | Differential bus outputs compliant with ISO 11898-2; include bus fault diagnostics (short-to-battery/ground, open-wire detection). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN Transceiver | 1.0 Mbps ISO 11898-2-compliant PHY with built-in bus diagnostics (VLG, VHG, VLVB, VHVB) enabling fault reporting without MCU intervention. |
| Programmable Window Watchdog | Four timeout periods (8.3–392 ms) selectable via SPI; accuracy ±12% in Normal mode ensures reliable software supervision across ECU states. |
| Dual Regulator Architecture | Internal 5.0 V/200 mA LDO + V2 control loop supports external PNP for second 5.0 V rail-eliminates need for discrete regulators in dual-rail ECU designs. |
| Automotive Power Management | Four low-power modes (Sleep current down to 55 µA) with configurable wake-up sources (L0–L3, CAN, cyclic sense) meeting OEM standby power budgets. |
| Robust Protection Suite | VSUP transient tolerance (40 V load dump), ±4 kV HBM on HS/Lx/CAN pins, thermal shutdown (160 °C), and overtemperature prewarning (125 °C) reduce system-level protection components. |
Applications
| Body Control Module (BCM) | Powertrain Control Unit (PCU) |
|---|---|
Use Scenario: Centralized vehicle lighting, door lock, and window control with CAN network integration. IC Role / Device Role / Timing Role: MC33742DW acts as primary power manager and CAN interface, supplying 5.0 V to microcontroller and driving local loads via HS output. Use Value: Reduces BOM count by integrating regulator, CAN transceiver, watchdog, and wake-up logic-cutting PCB area and validation effort. | Use Scenario: Engine management system requiring robust CAN communication and fail-safe power sequencing. IC Role / Device Role / Timing Role: MC33742DW provides monitored 5.0 V supply to engine MCU, enables CAN diagnostics, and triggers hardware reset on VDD undervoltage. Use Value: Overtemperature prewarning (TPW = 125 °C) allows predictive thermal derating before shutdown, improving engine control continuity. |
| Advanced Driver Assistance Systems (ADAS) Sensor Hub | Electric Vehicle Battery Management Interface |
Use Scenario: Aggregating radar/camera sensor data via CAN while maintaining ultra-low standby power. IC Role / Device Role / Timing Role: MC33742DW operates in Sleep mode (55 µA) with CAN wake-up enabled, then transitions to Normal mode to service sensor interrupts. Use Value: Sub-100 µA sleep current extends always-on functionality without compromising battery range in parked-state ADAS monitoring. | Use Scenario: Isolating BMS communication from high-voltage battery domain using galvanically separated CAN interface. IC Role / Device Role / Timing Role: MC33742DW supplies isolated 5.0 V to CAN controller and monitors VSUP for battery voltage faults (BATFAIL threshold = 3.0 V). Use Value: Integrated BATFAIL flag and early warning (5.8 V threshold) enable proactive low-voltage response before cell undervoltage cutoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar system basis chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33883EK | Higher integration: includes LIN transceiver and 3.3 V LDO; no V2 control loop; 40-pin QFN only. | Targets LIN+CAN hybrid gateways; lacks external V2 regulator support needed for dual 5 V rails. | Select MC33883EK only when LIN interface is required and external V2 regulation is unnecessary. |
| TCAN1042DRQ1 | CAN transceiver only (no regulators, watchdog, or HS switch); 5 V tolerant I/O; ±70 V bus fault protection. | Requires external power management IC; suitable for designs where SBC functionality is split across dedicated ICs. | Choose TCAN1042DRQ1 when modular architecture is preferred and full SBC integration is not required. |
Compared with MC33742DW, MC33883EK adds LIN but removes V2 flexibility, while TCAN1042DRQ1 offers superior bus fault protection but requires separate power and supervision ICs-making MC33742DW optimal for cost- and space-constrained single-chip ECU designs.
Availability
MC33742DW is available at Aetrix Electronics and suitable for automotive body control modules, powertrain ECUs, ADAS sensor hubs, and electric vehicle battery interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC33742DW 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 semiconductors, delivering secure, reliable, and energy-efficient solutions for vehicle electrification, connectivity, and autonomy.
The MC33742DW belongs to NXP's System Basis Chip portfolio, designed specifically for automotive electronic control units requiring integrated power management, high-speed CAN communication, and functional safety-aware supervision.
FAQ
What is the maximum operating temperature for the MC33742DW?
The MC33742DW is rated for operation from -40 °C to +125 °C ambient temperature, with junction temperature up to +150 °C. Its thermal shutdown activates at 160 °C, and overtemperature prewarning (TPW) is triggered at 125 °C-providing critical headroom for under-hood automotive environments. This specification is validated per AEC-Q100 Grade 1 requirements.
Does the MC33742DW support both 28-pin SOICW and 48-pin QFN packages?
No-the MC33742DW specifically denotes the 28-pin SOICW package (orderable part number suffix "DW"). The 48-pin QFN variant is designated as MC33742PEP/R2. Pinout, thermal performance, and some timing parameters (e.g., watchdog period) differ between packages; therefore, MC33742DW must be used only with its validated 28-pin SOICW footprint and layout guidelines.
How does the V2 regulator control work on the MC33742DW?
The MC33742DW uses V2 and V2CTRL pins to drive an external PNP bipolar transistor, forming a second 5.0 V regulator. V2 serves as the feedback sense input, while V2CTRL provides the base drive current (up to 10 mA). This architecture allows designers to scale output current beyond the internal 200 mA limit and tailor thermal behavior-critical for CAN transceiver supply or auxiliary 5 V rails in automotive ECUs.
What wake-up sources are available on the MC33742DW?
The MC33742DW supports four dedicated wake-up inputs (L0–L3), CAN bus activity (dominant/recessive edge detection), and cyclic sense or forced wake-up via SPI. Each Lx input has programmable voltage thresholds (2.0–4.7 V) and hysteresis, enabling direct connection to switches, sensors, or logic signals without external conditioning-reducing component count in battery-sensitive automotive applications.
Is the MC33742DW pin-compatible with the MC33742S variant?
No-while MC33742DW and MC33742S share identical pinouts and package, they differ in reset duration (15 ms vs. 3.5 ms) and internal timing calibration. This affects system-level reset coordination and watchdog behavior. Migration requires firmware validation and may necessitate timing adjustments in boot sequences; it is not a drop-in replacement without design review.
MC33742DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Applications:
- -
- Interface:
- SPI Serial
- Voltage - Supply:
- 5.5V ~ 18V
- Supplier Device Package:
- 28-SOIC
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
MC33742DW FAQ
1.How can I place an order for MC33742DW through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33742DW 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 MC33742DW reliable?
The price and inventory of MC33742DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33742DW is usually 5 days.
3.What payment methods are accepted for MC33742DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33742DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33742DW?
MC33742DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33742DW 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 MC33742DW?
For technical support, including MC33742DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33742DW requirements.
6.How does Aetrix verify that MC33742DW is sourced from the original manufacturer or authorized distributors?
All MC33742DW 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 MC33742DW meets industry standards.
7.What is the process for return or replacement of MC33742DW?
All MC33742DW units undergo pre-shipment inspection (PSI). If there is an issue with MC33742DW, 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 MC33742DW part is unused and in its original packaging.
Return procedure for MC33742DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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