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NXP Semiconductors MC33742SDWR2
- Part No.:
- MC33742SDWR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC33742SDWR2.pdf
- Description:
- IC INTERFACE SPECIALIZED 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,318
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Product details
Overview
MC33742SDWR2 from NXP Semiconductors (formerly Freescale) is an automotive-grade System Basis Chip (SBC) integrating a 1.0 Mbps high-speed CAN transceiver, dual 5.0 V regulators (one internal LDO, one external PNP-driven), programmable window watchdog, four wake-up inputs, high-side switch output, and SPI interface. It operates across -40 °C to 125 °C and supports Normal, Standby, Stop, and Sleep modes for ECU power management.
For engineers reviewing the MC33742SDWR2 datasheet, MC33742SDWR2 pinout, MC33742SDWR2 application, or MC33742SDWR2 equivalent, this device serves as a complete power, communication, and supervision solution for automotive body control modules, gateway ECUs, and battery management systems requiring ISO 11898-2 compliance, bus diagnostics, and low-quiescent-current sleep operation.
Technical Context
The MC33742SDWR2 implements a fully integrated SPI-controlled state machine managing mode transitions (Normal/Standby/Stop/Sleep), with independent control of VDD regulator, V2 external regulator, HS driver, CAN transceiver, and wake-up sources. Its CAN physical layer complies with ISO 11898-2, supports dominant/recessive detection, bus fault diagnostics (CANH/CANL voltage thresholds), and load-dump resilience up to 40 V.
Internal architecture includes a 100 kHz oscillator for timing-critical functions (watchdog, cyclic sense), hardware reset generation with 15 ms typical duration, and programmable interrupt logic tied to L0–L3 inputs, CAN activity, and thermal events. The V2CTRL pin delivers up to 10 mA drive current to control external PNP pass transistors for secondary 5.0 V regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CAN Data Rate | 1.0 Mbps - Full-speed operation compliant with ISO 11898-2 for real-time inter-ECU messaging in modern vehicle networks. |
| VDD Regulator Output | 5.0 V ±50 mV at 200 mA - Internally regulated supply for MCU core logic with dropout ≤0.5 V, enabling stable operation down to VSUP = 4.5 V. |
| SPI Clock Frequency | Up to 4.0 MHz - Enables fast configuration and status polling without CPU overhead in resource-constrained automotive microcontrollers. |
| Sleep Mode Current | 55–140 µA - Ultra-low quiescent draw in CAN-sleep mode with wake-up disabled, critical for always-on vehicle subsystems meeting OEM battery drain limits. |
| HS Switch Current Limit | 150 mA - Internally limited high-side driver for controlling auxiliary loads (e.g., sensors, LEDs, small solenoids) without external current-sense circuitry. |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood and chassis-mounted automotive applications per AEC-Q100 Grade 1 requirements. |
| Reset Pulse Duration | 15 ms (typical) - Guaranteed reset assertion time after power-up or VDD undervoltage, ensuring reliable MCU initialization across battery voltage transients. |
Pinout & Package
MC33742SDWR2 is housed in a 48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin definitions are validated per Freescale Document Number MC33742 Rev. 15.0, Tables 3 and 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP | Main Power Input | Accepts 4.5–27 V DC supply; withstands 40 V load dump transients per ISO 7637-2; powers all internal blocks. |
| VDD | Digital Regulator Output | 5.0 V LDO output delivering up to 200 mA to MCU; includes overtemperature prewarning and reset monitoring. |
| V2 / V2CTRL | External Regulator Interface | V2 senses emitter voltage of external PNP transistor; V2CTRL drives base-enabling configurable second 5.0 V rail for CAN transceiver or peripherals. |
| CANH / CANL | CAN Bus Differential Pair | ISO 11898-2-compliant outputs with ±40 V transient tolerance, common-mode range –27 V to +40 V, and built-in bus fault diagnostics. |
| L0–L3 | Wake-up Inputs | Four level-sensitive inputs with programmable hysteresis (0.6–1.3 V); detect switch closures or logic signals to exit Sleep/Stop modes. |
| HS | High-Side Driver Output | Internally current-limited (150 mA) switch with RDS(ON) ≤ 3.5 Ω @ 125 °C; drives external loads directly from VSUP. |
| RST / INT / WDOG | Supervisory Outputs | Active-low push-pull signals: RST resets MCU, INT flags enabled events, WDOG asserts on watchdog timeout. |
| SPI Pins (CS/MOSI/MISO/SCLK) | Configuration Interface | Full-duplex SPI up to 4 MHz; MISO tri-states when CS high; supports register read/write for mode control, status, and diagnostics. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN Transceiver | 1.0 Mbps ISO 11898-2 interface with bus short-to-battery/ground detection, recessive/dominant monitoring, and ±40 V transient immunity. |
| Dual 5.0 V Regulation | Internal 200 mA LDO (VDD) + external PNP-driven regulator (V2) - enables flexible power tree design for MCU, CAN, and peripheral rails. |
| Programmable Window Watchdog | Four selectable timeout periods (8.3–392 ms) in Normal/Standby/Stop modes with ±12% accuracy - prevents firmware lockup in safety-critical ECUs. |
| Low-Power Operating Modes | Sleep mode draws as low as 55 µA (125 °C) with CAN wake-up disabled; Stop mode consumes 80–210 µA depending on oscillator state and VSUP. |
| Automotive-Grade Protection | ESD robustness (±4 kV HBM), load-dump survival (40 V), overtemperature shutdown (155–200 °C), and BATFAIL early warning (5.3–6.3 V threshold). |
Applications
| Body Control Module (BCM) | Gateway ECU |
|---|---|
Use Scenario: Centralized control of door locks, lighting, wipers, and HVAC in modern vehicles. IC Role / Device Role / Timing Role: MC33742SDWR2 provides primary MCU power (VDD), secondary CAN-supply rail (V2), high-speed CAN connectivity, and wake-up capability via L0–L3 switch inputs. Use Value: Reduces BOM count by consolidating regulator, transceiver, watchdog, and wake-up logic into one AEC-Q100 qualified device. | Use Scenario: Aggregation and routing of messages between CAN FD, LIN, and Ethernet domains in vehicle network architecture. IC Role / Device Role / Timing Role: MC33742SDWR2 acts as the CAN 2.0B interface node with diagnostic reporting, bus monitoring, and controlled power sequencing during sleep/wake transitions. Use Value: Enables deterministic low-latency CAN frame handling while maintaining <100 µA sleep current for always-on gateway functionality. |
| Battery Management System (BMS) | Advanced Driver Assistance Systems (ADAS) Sensor Hub |
Use Scenario: Monitoring 12 V battery health, detecting undervoltage/overvoltage, and managing auxiliary loads in start-stop systems. IC Role / Device Role / Timing Role: MC33742SDWR2 supplies regulated power to BMS MCU, monitors VSUP via BATFAIL flag, triggers reset on brownout, and reports faults over CAN. Use Value: Integrates battery sensing (VBF threshold 1.5–4.0 V), early warning (5.3–6.3 V), and fail-safe reset-eliminating discrete comparators and reference ICs. | Use Scenario: Powering and interfacing radar, camera, and ultrasonic sensors in centralized ADAS domain controllers. IC Role / Device Role / Timing Role: MC33742SDWR2 delivers clean 5.0 V to sensor interfaces, enables CAN-based sensor data aggregation, and provides HS-switched power to enable/disable sensor sub-systems. Use Value: Supports rapid sensor activation/deactivation via HS pin and ensures CAN communication integrity during cold cranking (4.5 V VSUP minimum). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar system basis chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33883DVWR2 | Higher integration: adds LIN transceiver and enhanced watchdog; 40-pin QFN; no V2 external regulator support. | Targeted at LIN+CAN hybrid nodes; lacks dual-regulator flexibility for separate CAN/peripheral rails. | Select when LIN interface is required and external V2 regulation is unnecessary. |
| TCAN1042DRBR | Standalone CAN transceiver only; no regulators, watchdog, or wake-up inputs; 8-pin SOIC. | Requires external power management IC and supervision circuitry; suitable only for simple CAN node augmentation. | Select only if existing power architecture already provides 5 V rails, reset, and wake-up logic. |
Compared with MC33883DVWR2 and TCAN1042DRBR, the MC33742SDWR2 uniquely balances full SBC functionality-including dual 5 V regulation, programmable watchdog, and four wake-up inputs-with CAN 2.0B compliance in a single 48-pin QFN, making it optimal for cost- and space-constrained automotive ECUs needing both power and communication integration.
Availability
MC33742SDWR2 is available at Aetrix Electronics and suitable for automotive body control modules, gateway ECUs, battery management systems, and ADAS sensor hubs requiring stable component supply, AEC-Q100 qualification, and long-term automotive lifecycle support.
Supply support for MC33742SDWR2 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in automotive electronics and functional safety.
The MC33742SDWR2 belongs to NXP's System Basis Chip product line, designed specifically to reduce complexity in automotive electronic control units by integrating power regulation, high-speed CAN communication, supervision, and wake-up logic into a single AEC-Q100 qualified device.
FAQ
What is the maximum allowed VSUP voltage for continuous operation of the MC33742SDWR2?
The MC33742SDWR2 supports continuous VSUP operation from 4.5 V to 27 V. It also withstands transient load-dump conditions up to 40 V per ISO 7637-2, ensuring robustness during automotive battery jump-starts and alternator regulation faults. This rating applies across the full -40 °C to +125 °C ambient temperature range.
Does the MC33742SDWR2 support both CAN 2.0A and CAN 2.0B protocols?
Yes, the MC33742SDWR2's integrated transceiver is fully compliant with ISO 11898-2, supporting both CAN 2.0A (standard format) and CAN 2.0B (extended format) at data rates up to 1.0 Mbps. Protocol handling is managed by the connected MCU; the transceiver provides only the physical layer interface, differential signaling, and bus fault detection.
How does the V2 external regulator function in the MC33742SDWR2?
The MC33742SDWR2 uses V2 as a sense input and V2CTRL as a drive output to control an external PNP bipolar transistor, forming a second 5.0 V regulator. V2 monitors the emitter voltage of the external transistor, while V2CTRL sources up to 10 mA to bias its base-enabling precise regulation of a secondary rail for CAN transceiver supply or other peripherals independent of the internal VDD regulator.
What is the typical current consumption of the MC33742SDWR2 in Sleep mode with CAN wake-up disabled?
In Sleep mode with CAN wake-up disabled and oscillator not running, the MC33742SDWR2 draws 55 µA at 125 °C, 65 µA at 25 °C, and 80 µA at -40 °C (VSUP < 13.5 V). This ultra-low quiescent current meets stringent OEM requirements for battery-drain-limited always-on vehicle subsystems such as alarm systems and telematics modules.
Can the MC33742SDWR2 be used in non-automotive applications?
While the MC33742SDWR2 is AEC-Q100 qualified and optimized for automotive environments, its robust electrical specifications-including 40 V transient tolerance, -40 °C to +125 °C operation, and integrated protection features-make it suitable for demanding industrial applications such as heavy equipment control, railway signaling, and off-highway vehicle ECUs where reliability under harsh electrical conditions is critical.
MC33742SDWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- -
- Interface:
- SPI Serial
- Voltage - Supply:
- 5.5V ~ 18V
- Supplier Device Package:
- 28-SOIC
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
MC33742SDWR2 FAQ
1.How can I place an order for MC33742SDWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33742SDWR2 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 MC33742SDWR2 reliable?
The price and inventory of MC33742SDWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33742SDWR2 is usually 5 days.
3.What payment methods are accepted for MC33742SDWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33742SDWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33742SDWR2?
MC33742SDWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33742SDWR2 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 MC33742SDWR2?
For technical support, including MC33742SDWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33742SDWR2 requirements.
6.How does Aetrix verify that MC33742SDWR2 is sourced from the original manufacturer or authorized distributors?
All MC33742SDWR2 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 MC33742SDWR2 meets industry standards.
7.What is the process for return or replacement of MC33742SDWR2?
All MC33742SDWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33742SDWR2, 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 MC33742SDWR2 part is unused and in its original packaging.
Return procedure for MC33742SDWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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