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NXP Semiconductors UJA1076ATW/5V0/WDJ
- Part No.:
- UJA1076ATW/5V0/WDJ
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 32-TSSOP (0.240", 6.10mm Width) Exposed Pad
- Datasheet:
-
UJA1076ATW/5V0/WDJ.pdf
- Description:
- IC INTFACE SPECIALIZED 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
UJA1076ATW/5V0/WDJ from NXP Semiconductors is a high-speed CAN core System Basis Chip (SBC) integrating a ISO 11898-2/5-compliant CAN transceiver, 5 V/250 mA main voltage regulator (V1), dedicated 5 V CAN transceiver regulator (V2), SPI interface, dual local wake-up inputs, limp home output, and advanced watchdog with window/timeout/off modes. It replaces discrete ECU power, interface, and safety functions in automotive body control modules.
For engineers reviewing the UJA1076ATW/5V0/WDJ datasheet, UJA1076ATW/5V0/WDJ pinout, UJA1076ATW/5V0/WDJ application, or UJA1076ATW/5V0/WDJ equivalent, this page delivers verified technical context, exact pin functionality, automotive-grade EMC/ESD specs, thermal-safe regulator behavior under cranking, and real-world limp-home and wake-up implementation details.
Technical Context
The UJA1076ATW/5V0/WDJ implements a state-machine-based system controller managing Off/Standby/Normal/Sleep/Overtemp transitions triggered by VBAT thresholds, wake events, or temperature faults. Its CAN transceiver features SPLIT output for recessive bus stabilization and floating bus pins in Off mode.
V1 regulator delivers 5 V ±2 % at up to 250 mA with undervoltage warning at 90 % and reset at 90 % or 70 % of nominal; it operates down to 4.5 V during cranking per ISO 7637/16750-2. V2 supplies the CAN transceiver independently and shuts off in Standby/Sleep, supporting external supply via V1 or external regulator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CAN Standard | ISO 11898-2:2003 and ISO 11898-5:2006 compliant high-speed CAN transceiver; interoperable with TJA1042 |
| Main Regulator (V1) | 5 V ±2 % output; 250 mA max; supports external PNP transistor for thermal distribution; operates down to 4.5 V VBAT |
| CAN Regulator (V2) | 5 V dedicated output for internal transceiver; switchable off; stable down to 5.5 V VBAT during cranking |
| Watchdog | On-chip oscillator-clocked; Window/Timeout/Off modes; programmable period (8–4096 ms); WDOFF pin disables it |
| SPI Interface | Full-duplex 16-bit SPI; register read/write access; chip select (SCSN), clock (SCK), data in (SDI), data out (SDO) |
| Wake-up Capability | Dual local wake-up inputs (WAKE1/WAKE2); CAN bus wake-up detection; configurable sampling (16/64 ms) via WBIAS |
| Protection Ratings | ±8 kV HBM ESD on CAN/wake pins; ±6 kV IEC 61000-4-2; ±58 V short-circuit proof CAN pins; ISO 7637-3 transient protection |
Pinout & Package
UJA1076ATW/5V0/WDJ uses a 32-pin HTSSOP package (6.1 mm × 11 mm, 0.65 mm pitch) with exposed thermal pad soldered to PCB ground for enhanced thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT (32) | Battery supply input | Primary power source for SBC; enables operation down to 4.5 V during engine cranking |
| V1 (4) | Main regulator output | 5 V ±2 % supply for microcontroller and peripherals; supports external PNP extension |
| V2 (20) | CAN transceiver regulator output | Dedicated 5 V supply for internal CAN transceiver; independent of V1 for improved EMC |
| RSTN (6) | Bidirectional reset I/O | Drives LOW during power-on, watchdog overflow, or overtemperature; supports variable reset length |
| INTN (7) | Interrupt output | Signals V1/V2 undervoltage, CAN/local wake-up, cyclic, or power-on events; individually configurable |
| EN (8) | Enable output | Controls external safety-critical hardware; driven HIGH only in Normal mode when ENC = 1 |
| SDI/SDO/SCK/SCSN (9–12) | SPI interface signals | Full-duplex communication with microcontroller; supports register read-back without modification |
| TXDC/RXDC (13–14) | CAN controller interface | Digital connection to MCU's CAN controller; isolates logic-level signaling from bus-side transceiver |
| CANH/CANL (21–22) | CAN bus differential pair | High-speed CAN physical layer interface; ±58 V short-circuit protected; ISO 7637-3 transient hardened |
| SPLIT (24) | CAN common-mode stabilization | Outputs bias voltage to stabilize recessive bus level; reduces ringing in unterminated or branched topologies |
| WAKE1/WAKE2 (18–19) | Local wake-up inputs | Analog inputs detecting external switch closure; configurable sampling (16/64 ms) and edge-triggered interrupts |
| LIMP (17) | Limp home activation output | Drives LOW during Overtemp mode or software-activated limp-home condition to trigger fail-safe hardware |
| WDOFF (16) | Watchdog disable input | Hardware override: HIGH disables watchdog regardless of WMC setting; triggers immediate reset if changed in Normal/Standby |
| WBIAS (28) | Wake-up bias control | Provides bias current for external wake-up switches; sampling time selectable via WBC bit (16 ms or 64 ms) |
| VEXCTRL/VEXCC (31–29) | External PNP transistor interface | VEXCTRL drives base; VEXCC measures collector current; enables scalable current delivery beyond 250 mA |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN ECU function set | Combines transceiver, dual regulators, watchdog, SPI, wake-up inputs, and limp home in single HTSSOP32 package-reducing BOM count and PCB area vs discrete solutions |
| Automotive-grade robustness | Meets ISO 7637-3 transient immunity, ±8 kV HBM/±6 kV IEC ESD, and ±58 V CAN bus short-circuit tolerance-validated for 12 V vehicle systems |
| Thermally optimized power delivery | V1 regulator supports external PNP transistor via VEXCTRL/VEXCC pins; enables heat distribution across PCB while maintaining 5 V ±2 % regulation |
| Intelligent low-power management | Four operational modes (Off/Standby/Normal/Sleep) with automatic transitions; Standby draws ultra-low current while retaining full wake-up capability via CAN or local inputs |
| Fail-safe system supervision | Overtemperature shutdown forces LIMP output LOW and RSTN LOW; watchdog with independent oscillator ensures deterministic reset even if MCU fails |
Applications
| Body Control Module (BCM) | Door Control Unit (DCU) |
|---|---|
|
Use Scenario: Centralized control of door locks, windows, mirrors, and interior lighting in modern vehicles. IC Role / Device Role / Timing Role: UJA1076ATW/5V0/WDJ serves as the primary power manager and CAN interface, supplying 5 V to MCU and peripherals while enabling reliable wake-up from sleep via door handle switches or CAN messages. Use Value: Eliminates need for discrete LDO, CAN transceiver, and watchdog; its ±58 V CAN bus protection prevents field failures from load dump events. |
Use Scenario: Distributed control unit mounted inside vehicle door, managing window lift motors, anti-pinch sensors, and keyless entry receivers. IC Role / Device Role / Timing Role: UJA1076ATW/5V0/WDJ provides regulated 5 V power to MCU and motor drivers, monitors local wake-up inputs from window switches, and reports faults via CAN using SPI-configurable diagnostics. Use Value: SPLIT pin stabilizes CAN recessive level across long door harnesses; V2 regulator isolation improves EMC margin during motor commutation noise. |
| Seat Control Module (SCM) | Roof Module (Sunroof/Convertibles) |
|
Use Scenario: Actuation and position feedback for power-adjustable driver/passenger seats with memory and heating functions. IC Role / Device Role / Timing Role: UJA1076ATW/5V0/WDJ powers seat MCU and LIN transceivers, detects wake-up from seat position sensors or CAN commands, and activates limp-home output if motor stall or overtemperature occurs. Use Value: LIMP output directly drives fail-safe relays to cut power to seat motors; watchdog window mode prevents unintended resets during extended calibration sequences. |
Use Scenario: Sunroof or convertible top control with pinch detection, rain sensing, and anti-trap logic. IC Role / Device Role / Timing Role: UJA1076ATW/5V0/WDJ supplies 5 V to sunroof MCU and motor drivers, uses WAKE1/WAKE2 for rain sensor and limit switch inputs, and reports status via CAN with interrupt-driven fault reporting. Use Value: Dual wake-up inputs with configurable sampling reduce current draw in Standby mode; V1 undervoltage reset at 70 % supports brown-out recovery during battery voltage sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CAN SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TJA1043TK/0Z | Single-chip high-speed CAN transceiver only; no integrated voltage regulators or watchdog; requires external 5 V supply and MCU supervision | Used where power management is handled separately (e.g., multi-rail PMIC); lacks limp home, wake-up inputs, and SPI configuration | Select when only CAN physical layer is needed and system already includes discrete regulators/watchdog; not a functional replacement for UJA1076ATW/5V0/WDJ's integrated ECU functions |
| UJA1169ATW/5V0/WDJ | Next-generation NXP SBC with identical pinout, 5 V V1 regulator, but adds LIN transceiver, higher V1 current (350 mA), and enhanced watchdog diagnostics | Targets newer platforms requiring LIN support or higher current; backward-compatible for drop-in upgrade where layout allows | Choose for new designs needing LIN integration or >250 mA MCU supply; retains same footprint and basic register map but extends feature set |
Compared with TJA1043TK/0Z, UJA1076ATW/5V0/WDJ consolidates power, interface, and safety functions into one IC-reducing component count and qualification effort. Against UJA1169ATW/5V0/WDJ, it offers proven reliability in cost-sensitive legacy platforms without LIN requirement, with identical 5 V regulation and watchdog architecture.
Availability
UJA1076ATW/5V0/WDJ is available at Aetrix Electronics and suitable for automotive body control modules, door control units, seat control modules, and roof modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for UJA1076ATW/5V0/WDJ 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 UJA1076ATW/5V0/WDJ belongs to NXP's System Basis Chip portfolio, designed specifically to replace discrete ECU power, communication, and supervision components in 12 V automotive networks-enabling compact, robust, and ASIL-ready electronic control units.
FAQ
What is the operating voltage range for UJA1076ATW/5V0/WDJ during engine cranking?
The UJA1076ATW/5V0/WDJ operates with VBAT down to 4.5 V for the main regulator (V1) and down to 5.5 V for the CAN transceiver regulator (V2), meeting ISO 7637-2 and ISO 16750-2 requirements for cranking conditions. This ensures continuous microcontroller power and CAN bus functionality even during severe battery voltage sags.
Does UJA1076ATW/5V0/WDJ support remote flash programming over CAN?
Yes, UJA1076ATW/5V0/WDJ supports remote flash programming via the CAN bus. Its integrated high-speed CAN transceiver and SPI interface enable secure bootloader communication with the host microcontroller, allowing firmware updates without physical access to the ECU.
How does the SPLIT pin improve CAN bus stability in UJA1076ATW/5V0/WDJ?
The SPLIT pin on UJA1076ATW/5V0/WDJ outputs a bias voltage that stabilizes the recessive common-mode level on the CAN bus, reducing ringing caused by reflections in unterminated or branched topologies-especially critical in long harness runs like those found in door or seat modules.
Can UJA1076ATW/5V0/WDJ drive external PNP transistors for higher current delivery?
Yes, UJA1076ATW/5V0/WDJ supports external PNP transistor extension of its V1 regulator via dedicated VEXCTRL (base drive) and VEXCC (collector current sense) pins. This allows scalable current delivery beyond 250 mA while distributing thermal load across the PCB.
What happens to the CAN bus pins when UJA1076ATW/5V0/WDJ enters Off mode?
In Off mode, the CAN bus pins (CANH and CANL) of UJA1076ATW/5V0/WDJ become truly floating-disconnected from internal circuitry-to prevent leakage current and ensure zero bus loading. This behavior complies with ISO 11898-2 requirements for powered-down nodes.
UJA1076ATW/5V0/WDJ 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:
- SPI Serial
- Voltage - Supply:
- 4.5V ~ 28V
- Supplier Device Package:
- 32-HTSSOP
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
UJA1076ATW/5V0/WDJ FAQ
1.How can I place an order for UJA1076ATW/5V0/WDJ through Aetrix?
Please submit a Request for Quotation (RFQ) for UJA1076ATW/5V0/WDJ 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 UJA1076ATW/5V0/WDJ reliable?
The price and inventory of UJA1076ATW/5V0/WDJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UJA1076ATW/5V0/WDJ is usually 5 days.
3.What payment methods are accepted for UJA1076ATW/5V0/WDJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UJA1076ATW/5V0/WDJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UJA1076ATW/5V0/WDJ?
UJA1076ATW/5V0/WDJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UJA1076ATW/5V0/WDJ 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 UJA1076ATW/5V0/WDJ?
For technical support, including UJA1076ATW/5V0/WDJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UJA1076ATW/5V0/WDJ requirements.
6.How does Aetrix verify that UJA1076ATW/5V0/WDJ is sourced from the original manufacturer or authorized distributors?
All UJA1076ATW/5V0/WDJ 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 UJA1076ATW/5V0/WDJ meets industry standards.
7.What is the process for return or replacement of UJA1076ATW/5V0/WDJ?
All UJA1076ATW/5V0/WDJ units undergo pre-shipment inspection (PSI). If there is an issue with UJA1076ATW/5V0/WDJ, 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 UJA1076ATW/5V0/WDJ part is unused and in its original packaging.
Return procedure for UJA1076ATW/5V0/WDJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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