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NXP Semiconductors UJA1075ATW/3V3WD,1
- Part No.:
- UJA1075ATW/3V3WD,1
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 32-TSSOP (0.240", 6.10mm Width) Exposed Pad
- Datasheet:
-
UJA1075ATW/3V3WD,1.pdf
- Description:
- IC INTFACE SPECIALIZED 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,484
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Product details
Overview
UJA1075ATW/3V3WD,1 from NXP Semiconductors is a high-speed CAN/LIN core System Basis Chip (SBC) integrating a 3.3 V/250 mA microcontroller voltage regulator (V1), a dedicated 5 V CAN transceiver regulator (V2), ISO 11898-2/5-compliant high-speed CAN transceiver, LIN 2.2A/SAE J2602-compliant LIN transceiver, SPI interface, dual local wake-up inputs, and an advanced window/timeout watchdog. It serves as the central power, communication, and safety controller in automotive ECUs.
For engineers reviewing the UJA1075ATW/3V3WD,1 datasheet, UJA1075ATW/3V3WD,1 pinout, UJA1075ATW/3V3WD,1 application, or UJA1075ATW/3V3WD,1 equivalent, key selection criteria include its 3.3 V V1 regulator accuracy (±2 %), ±58 V short-circuit proof CAN/LIN bus pins, 16-bit SPI for diagnostics, dual wake-up input sampling control (16 ms or 64 ms), and limp home output activation during overtemperature fault.
Technical Context
The UJA1075ATW/3V3WD,1 implements a state-machine-based system controller managing Off, Standby, Normal, Sleep, and Overtemp modes with deterministic transitions triggered by VBAT thresholds, wake events, or thermal conditions. Its CAN transceiver features SPLIT output for recessive bus stabilization and independent low-dropout V2 regulation to enhance EMC performance.
The integrated watchdog uses an on-chip oscillator independent of V1/V2, supports programmable periods (8–4096 ms), and provides Window mode with closed timing windows for fail-safe microcontroller supervision. The LIN transceiver includes integrated termination diode at DLIN and low-slope mode (10.4 kbit/s) for optimized EMC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V1 Output Voltage | 3.3 V ±2 % - powers microcontroller and peripherals with tight regulation across load and temperature. |
| V1 Max Current | 250 mA - sufficient for typical automotive MCUs; extendable via external PNP transistor for thermal distribution. |
| CAN Compliance | ISO 11898-2:2003 & ISO 11898-5:2006 - ensures interoperability with TJA1042 and robust high-speed bus operation. |
| LIN Compliance | LIN 2.2A & SAE J2602 - guarantees full protocol compatibility including backward support to LIN 1.0. |
| Bus Pin Protection | ±58 V short-circuit proof - enables direct connection to automotive battery without external protection circuitry. |
| ESD Protection | ±8 kV HBM / ±6 kV IEC 61000-4-2 on CAN/LIN/wake pins - meets stringent automotive EMC requirements. |
| Watchdog Modes | Window, Timeout, Off - configurable via SPI register (NWP bits) with default 128 ms period and independent clock source. |
| Operating Ambient Temp | −40 °C to +150 °C - qualified for under-hood automotive environments per AEC-Q100 Grade 0. |
Pinout & Package
Package: HTSSOP32 (SOT549-1), 6.1 mm × 11 mm, 0.65 mm pitch, exposed die pad for thermal and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT (32) | Battery supply input | Primary power source; supports cranking down to 4.5 V (V1) and 5.5 V (V2) per ISO 7637. |
| V1 (4) | Main regulator output | 3.3 V ±2 % supply for MCU and peripherals; undervoltage warning at 90 %, reset at 90 % or 70 % threshold. |
| V2 (20) | CAN transceiver regulator | Dedicated 5 V supply for internal CAN PHY; improves EMC and isolates CAN noise from MCU domain. |
| RSTN (6) | Bidirectional reset I/O | Drives LOW during power-on, watchdog timeout, or overtemperature; supports variable POR length for diverse MCUs. |
| INTN (7) | Interrupt output | Open-drain signal indicating V1/V2 undervoltage, CAN/LIN/local wake-up, cyclic, or power-on events. |
| WAKE1/WAKE2 (18,19) | Analog wake-up inputs | Configurable sampling (16 ms or 64 ms) with bias control via WBIAS; detect external switch closures in Standby. |
| LIMP (17) | Limp home output | Active-low signal activated during overtemperature fault to trigger fail-safe hardware behavior. |
| SPI (9–12) | Serial Peripheral Interface | Full-duplex 16-bit interface (SDI/SDO/SCK/SCSN) for configuration, status readback, and diagnostic reporting. |
| CANH/CANL (21,22) | CAN bus differential pair | High-speed physical layer interface; pins are floating when powered off and protected to ±58 V. |
| LIN/DLIN (25,26) | LIN bus line & termination | Single-wire LIN interface with integrated termination diode at DLIN for simplified board layout. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-regulator architecture | V1 (3.3 V/250 mA) + V2 (5 V) enable clean separation of MCU and CAN power domains, reducing noise coupling. |
| Advanced low-power concept | Standby current < 100 µA and Sleep current < 20 µA with full wake-up capability via CAN, LIN, or local inputs. |
| Safe system start-up behavior | Deterministic state-machine boot sequence with power-on reset, undervoltage monitoring, and mode transition validation. |
| Detailed multi-level status reporting | SPI-accessible registers report V1/V2 status, wake-source identification, interrupt flags, and watchdog health in real time. |
| Robust automotive-grade protection | ±58 V short-circuit, ±8 kV HBM, ±6 kV IEC 61000-4-2, and ISO 7637-3 transient immunity ensure field reliability. |
| Remote flash programming support | Enables firmware updates over CAN bus without requiring physical access or additional programming hardware. |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) |
|---|---|
|
Use Scenario: Centralized power management and communication interface for door locks, lighting, and climate actuators. IC Role / Device Role / Timing Role: Core SBC providing regulated 3.3 V supply to MCU, high-speed CAN for gateway communication, and LIN for sensor/actuator sub-networks. Use Value: Reduces BOM count by replacing discrete regulators, CAN/LIN transceivers, and watchdog ICs while enabling coordinated wake-up and limp-home fail-safe. |
Use Scenario: Power and communication hub in engine management systems requiring cranking resilience and thermal robustness. IC Role / Device Role / Timing Role: Supplies MCU during cold-crank (VBAT ≥ 4.5 V), monitors CAN bus activity for wake-up, and triggers LIMP output on overtemperature shutdown. Use Value: Maintains functional safety compliance with overtemperature shutdown, bidirectional RSTN, and independent V2 regulation for CAN integrity under load dump. |
| Transmission Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) Sensor Hub |
|
Use Scenario: Real-time coordination between gear actuation, clutch control, and vehicle dynamics modules via CAN. IC Role / Device Role / Timing Role: Enables remote flash programming over CAN, supports cyclic wake-up for periodic diagnostics, and delivers stable 3.3 V to transmission MCU. Use Value: Eliminates need for external programming interfaces and reduces ECU restart latency during OTA updates via embedded CAN bootloader support. |
Use Scenario: Aggregation and preprocessing node for radar, camera, and ultrasonic sensors using LIN for low-cost peripheral connectivity. IC Role / Device Role / Timing Role: Powers vision processor via V1, routes LIN commands to sensors, and detects local wake events (e.g., parking assist activation). Use Value: Integrates LIN termination (DLIN), low-slope mode for EMC-sensitive ADAS environments, and dual wake-up inputs for context-aware sensor activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar core SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TJA1043TK/3 | Single-function high-speed CAN transceiver only; no LIN, no regulators, no watchdog, no SPI. | Requires external LIN transceiver, voltage regulators, and watchdog - increases BOM and PCB area. | Select when only CAN interface is needed and system already integrates separate power/monitoring functions. |
| UJA1076ATW/3V3WD,1 | Same footprint and pinout; adds integrated 5 V/150 mA secondary regulator (V3) for external transceivers or sensors. | Supports more complex ECU architectures with multiple voltage domains; higher quiescent current in Standby mode. | Choose when powering external high-side switches or additional LIN/CAN transceivers beyond MCU requirements. |
Compared with UJA1075ATW/3V3WD,1, TJA1043TK/3 requires full external power and supervision circuitry, while UJA1076ATW/3V3WD,1 extends functionality with a third regulator but trades off slightly higher standby current for greater integration flexibility.
Availability
UJA1075ATW/3V3WD,1 is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, transmission control units, and ADAS sensor hubs requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for UJA1075ATW/3V3WD,1 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 UJA1075ATW/3V3WD,1 belongs to NXP's System Basis Chip product line, designed specifically to consolidate power, communication, and safety functions into a single AEC-Q100-qualified device for next-generation automotive ECUs.
FAQ
What is the nominal output voltage and accuracy of the main regulator (V1) in UJA1075ATW/3V3WD,1?
The UJA1075ATW/3V3WD,1 features a 3.3 V main voltage regulator (V1) with ±2 % output accuracy across temperature and load conditions. This precision ensures reliable operation of automotive microcontrollers and peripherals without requiring external trimming or feedback compensation. The regulator supports undervoltage warning at 90 % of nominal output and configurable reset thresholds at either 90 % or 70 % of nominal output voltage.
Does UJA1075ATW/3V3WD,1 support remote firmware updates over the CAN bus?
Yes, UJA1075ATW/3V3WD,1 supports remote flash programming via the high-speed CAN bus. Its integrated SPI interface allows the host microcontroller to configure watchdog settings, monitor status registers, and manage power modes during update sequences. This capability eliminates the need for physical programming interfaces and enables over-the-air (OTA) updates in deployed vehicles.
How does the watchdog in UJA1075ATW/3V3WD,1 differ from basic timeout watchdogs?
The UJA1075ATW/3V3WD,1 implements an advanced watchdog with Window mode, Timeout mode, and Off mode - all selectable via SPI register (WMC bit). Unlike basic timeout watchdogs, its Window mode enforces strict timing windows: triggering too early (first half) or too late (overflow) causes immediate reset. It uses an on-chip oscillator independent of V1/V2, ensuring supervision remains active even during power rail faults.
What protection features are implemented on the CAN and LIN bus pins of UJA1075ATW/3V3WD,1?
The CANH, CANL, LIN, and wake-up pins of UJA1075ATW/3V3WD,1 feature ±58 V short-circuit protection, ±8 kV HBM ESD, and ±6 kV IEC 61000-4-2 ESD immunity. They also comply with ISO 7637-3 for transient surge protection. These protections allow direct connection to automotive battery and bus lines without external TVS diodes or filtering components in most implementations.
Can UJA1075ATW/3V3WD,1 operate during engine cranking conditions?
Yes, UJA1075ATW/3V3WD,1 is designed for automotive cranking resilience: V1 regulator operates down to 4.5 V VBAT, and V2 regulator operates down to 5.5 V VBAT - both compliant with ISO 7637 and ISO 16750-2. Its advanced low-power concept maintains wake-up detection and status reporting even during deep brown-out conditions, ensuring ECU readiness immediately after crank.
UJA1075ATW/3V3WD,1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-TSSOP (0.240", 6.10mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Applications:
- -
- Interface:
- CAN, LIN
- Voltage - Supply:
- 4.5V ~ 28V
- Supplier Device Package:
- 32-HTSSOP
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
UJA1075ATW/3V3WD,1 FAQ
1.How can I place an order for UJA1075ATW/3V3WD,1 through Aetrix?
Please submit a Request for Quotation (RFQ) for UJA1075ATW/3V3WD,1 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 UJA1075ATW/3V3WD,1 reliable?
The price and inventory of UJA1075ATW/3V3WD,1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UJA1075ATW/3V3WD,1 is usually 5 days.
3.What payment methods are accepted for UJA1075ATW/3V3WD,1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UJA1075ATW/3V3WD,1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UJA1075ATW/3V3WD,1?
UJA1075ATW/3V3WD,1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UJA1075ATW/3V3WD,1 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 UJA1075ATW/3V3WD,1?
For technical support, including UJA1075ATW/3V3WD,1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UJA1075ATW/3V3WD,1 requirements.
6.How does Aetrix verify that UJA1075ATW/3V3WD,1 is sourced from the original manufacturer or authorized distributors?
All UJA1075ATW/3V3WD,1 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 UJA1075ATW/3V3WD,1 meets industry standards.
7.What is the process for return or replacement of UJA1075ATW/3V3WD,1?
All UJA1075ATW/3V3WD,1 units undergo pre-shipment inspection (PSI). If there is an issue with UJA1075ATW/3V3WD,1, 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 UJA1075ATW/3V3WD,1 part is unused and in its original packaging.
Return procedure for UJA1075ATW/3V3WD,1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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