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NXP Semiconductors UJA1078TW/5V0,118
- Part No.:
- UJA1078TW/5V0,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 32-TSSOP (0.240", 6.10mm Width) Exposed Pad
- Datasheet:
-
UJA1078TW/5V0,118.pdf
- Description:
- IC INTFACE SPECIALIZED 32HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
UJA1078TW/5V0,118 from NXP Semiconductors is a core System Basis Chip (SBC) integrating a high-speed CAN transceiver (ISO 11898-2/5 compliant), two LIN 2.1 transceivers (SAE J2602 compatible), a 5 V/250 mA microcontroller voltage regulator (V1), a dedicated 5 V CAN transceiver regulator (V2), SPI interface, dual local wake-up inputs, and limp home output - deployed in automotive ECU power and communication subsystems for engine control modules and body electronics.
For engineers reviewing the UJA1078TW/5V0,118 datasheet, UJA1078TW/5V0,118 pinout, UJA1078TW/5V0,118 application, or UJA1078TW/5V0,118 equivalent, this page delivers verified technical context, exact pin functions, automotive-grade EMC/ESD specs (±8 kV HBM), thermal-aware package details (HTSSOP32), and validated alternative part guidance for ECU design continuity and supply assurance.
Technical Context
The UJA1078TW/5V0,118 implements a multi-domain system controller managing four operational modes (Off, Standby, Normal, Sleep) with mode transitions triggered by VBAT thresholds, wake events (CAN/LIN/WAKE1/WAKE2), or software register writes. Its dual-regulator architecture isolates V1 (5 V/250 mA for MCU) from V2 (5 V for CAN transceiver), enabling independent undervoltage monitoring (90 % V1 reset threshold) and cranking resilience down to 4.5 V.
SPI communication uses full-duplex protocol with register-mapped control (WD_and_Status, Mode_Control, Int_Control), supporting watchdog configuration (Window/Timeout/Off), LIN slope selection (10.4/20 kbit/s), and wake-source detection. The integrated oscillator clocks the watchdog independently of V1/V2, and bus pins feature ±58 V short-circuit protection with floating behavior when powered off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CAN Interface | High-speed CAN transceiver compliant with ISO 11898-2 and ISO 11898-5; supports active bus communication and low-power wake-up detection in Standby/Normal modes. |
| LIN Interfaces | Dual LIN 2.1 transceivers compliant with SAE J2602 and backward-compatible with LIN 2.0/1.3; include low-slope mode (10.4 kbit/s) for optimized EMC. |
| V1 Regulator | 5 V ±2 % (LIN master) / ±3 % (LIN slave) output delivering up to 250 mA; supports external PNP transistor for thermal load sharing and operates down to 4.5 V VBAT during cranking. |
| V2 Regulator | Dedicated 5 V regulator for internal CAN transceiver; stable output with undervoltage warning at 90 % nominal; switchable OFF to reduce quiescent current. |
| Watchdog | Programmable watchdog with Window/Timeout/Off modes; clocked by on-chip oscillator; default period 128 ms; configurable via WD_and_Status register bits NWP. |
| Wake-up Sources | Three independent wake-up paths: CAN bus activity, LIN bus activity (LIN1/LIN2), and two local digital inputs (WAKE1/WAKE2) with selectable sampling (16 ms/64 ms). |
| Package | HTSSOP32 (SOT549-1): 6.1 mm × 11 mm thermally enhanced thin shrink small outline package with 0.65 mm pitch and exposed die pad for PCB heat dissipation. |
Pinout & Package
Package: HTSSOP32 (SOT549-1), 32-pin thermally enhanced thin shrink small outline package with 6.1 mm body width, 0.65 mm lead pitch, and exposed die pad (electrically isolated, may be connected to GND or left floating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT (32) | Battery supply input | Primary power source for SBC; supports operation down to 4.5 V (cranking); powers internal oscillator and logic independently of V1/V2. |
| V1 (4) | Main regulator output | 5 V regulated supply for microcontroller and peripherals; ±2 % accuracy for LIN master applications; enables external PNP transistor via VEXCTRL/VEXCC. |
| V2 (20) | CAN transceiver regulator output | Dedicated 5 V supply for internal CAN transceiver; electrically isolated from V1 to prevent noise coupling and improve EMC performance. |
| RSTN (6) | Bidirectional reset I/O | Active-low reset signal shared with MCU; supports variable power-on reset length and software-initiated system reset. |
| INTN (7) | Interrupt output | Open-drain interrupt signal indicating V1/V2 undervoltage, CAN/LIN/local wake-up, cyclic, or power-on events; individually maskable via Int_Control register. |
| WAKE1 (18), WAKE2 (19) | Local wake-up inputs | Digital wake sources with programmable sampling (16 ms/64 ms via WBIAS); support pull-down biasing and wake-event flagging in Int_Status register. |
| LIMP (17) | Limp home control output | Active-low output asserting 'limp home' hardware during overtemperature or critical failure; controlled by LHC bit in Mode_Control register. |
| SPI Signals (SDI/SDO/SCK/SCSN) | Serial Peripheral Interface | Full-duplex SPI interface (pins 9–12) for register configuration, status readback, and diagnostic access; supports read-only mode to avoid unintended writes. |
| CANH/CANL (21/22) | CAN bus differential pair | High-speed CAN physical layer interface; ±58 V short-circuit protected; floating when unpowered; includes SPLIT (24) for recessive-level stabilization. |
| LIN1/LIN2/DLIN (25/27/26) | LIN bus interfaces | LIN1 and LIN2 bus lines with integrated termination diode at DLIN (26); support low-slope mode for reduced EMI in noisy automotive environments. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN + dual LIN transceivers | Reduces discrete component count in ECU designs while maintaining ISO 11898-2/5 and LIN 2.1 compliance - eliminates need for separate TJA1042 + two LIN ICs. |
| Independent V1/V2 regulators | Enables simultaneous MCU operation and CAN communication during low-VBAT conditions (e.g., engine cranking), with V2 remaining stable even if V1 drops below regulation. |
| Automotive-grade protection | ±8 kV HBM ESD on CAN/LIN/WAKE pins, ±6 kV IEC 61000-4-2, ±58 V short-circuit tolerance, and ISO 7637-3 transient immunity - meets AEC-Q100 stress requirements. |
| Thermal-aware power management | Exposed die pad in HTSSOP32 package enables direct PCB heat sinking; external PNP transistor support distributes thermal load across board area, avoiding localized hotspots. |
| Configurable watchdog & diagnostics | Window-mode watchdog prevents runaway code with precise timing windows; SPI-accessible registers provide real-time status of V1/V2, wake sources, interrupts, and temperature faults. |
Applications
| Engine Control Module (ECM) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Centralized power and communication hub in gasoline/diesel engine ECUs managing crankshaft/camshaft sensors, fuel injectors, and throttle actuators via CAN and LIN sub-networks. IC Role / Device Role / Timing Role: Core SBC providing regulated 5 V power to MCU, high-speed CAN backbone connectivity, and dual LIN interfaces for sensor/actuator clusters - ensuring deterministic startup and fault-safe shutdown. Use Value: Enables single-chip replacement of discrete CAN transceiver, LIN transceivers, voltage regulators, and watchdog - reducing BOM cost by ~35 % and PCB area by 40 % vs. discrete solution. |
Use Scenario: Power and network interface in vehicle body electronics controlling door locks, lighting, HVAC, and mirror positioning using LIN slaves and CAN gateway functions. IC Role / Device Role / Timing Role: System basis chip supplying 5 V to body MCU, hosting dual LIN buses for distributed peripherals, and supporting remote flash programming via CAN bus. Use Value: Delivers guaranteed wake-up from Sleep mode (< 20 µA quiescent current) via LIN or local switches - meeting OEM requirements for < 100 µA total ECU standby current. |
| Transmission Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) Sensor Hub |
|
Use Scenario: ECU in automatic transmission systems coordinating solenoid valves, pressure sensors, and gear position feedback through high-integrity CAN and LIN networks. IC Role / Device Role / Timing Role: Safety-enhanced SBC with limp home output (LIMP) activating mechanical fail-safe modes during overtemperature or regulator faults - critical for ASIL-B functional safety compliance. Use Value: Overtemperature shutdown and LIMP assertion within 10 ms of thermal violation provides hardware-enforced safety response - eliminating reliance on software-based thermal monitoring. |
Use Scenario: Consolidated interface for radar, camera, and ultrasonic sensors in ADAS domain controllers requiring robust low-power wake-up and CAN/LIN interoperability. IC Role / Device Role / Timing Role: Dual-LIN-capable SBC enabling synchronized sensor polling and CAN-based data aggregation; supports cyclic wake-up for periodic sensor health checks without MCU intervention. Use Value: Programmable 16/64 ms WBIAS sampling interval allows precise trade-off between wake-up latency and standby current - achieving < 5 µA per wake channel in Standby mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar system basis chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UJA1076TW/5V0,118 | Single-LIN variant (one LIN transceiver only); identical CAN, V1/V2 regulators, SPI, and watchdog functionality; same HTSSOP32 package. | Suitable for cost-sensitive ECUs with only one LIN sub-bus (e.g., simple seat control modules); lacks second LIN for redundant or multi-zone architectures. | Select UJA1076TW/5V0,118 when dual-LIN capability is unnecessary - reduces BOM cost while retaining full CAN, power, and safety features of UJA1078TW/5V0,118. |
| TJA1145A/3V3/1 | 3.3 V V1 regulator version; includes embedded high-speed CAN FD transceiver (ISO 11898-2:2016); no LIN transceivers; supports partial networking and wake-on-CAN FD frames. | Targeted at next-gen ADAS and gateway ECUs requiring CAN FD bandwidth and lower-voltage MCU support; not suitable for legacy LIN-based body electronics. | Choose TJA1145A/3V3/1 for CAN FD migration paths where LIN is handled externally or omitted; UJA1078TW/5V0,118 remains optimal for dual-LIN + classical CAN automotive platforms. |
Compared with UJA1076TW/5V0,118, the UJA1078TW/5V0,118 adds a second LIN transceiver without increasing package size or thermal footprint - enabling scalable ECU designs. Against TJA1145A/3V3/1, it trades CAN FD and 3.3 V support for dual-LIN compatibility and proven 5 V MCU integration in production automotive platforms.
Availability
UJA1078TW/5V0,118 is available at Aetrix Electronics and suitable for engine control modules, body control units, transmission control units, and ADAS sensor hubs requiring stable component supply, automotive-grade reliability, and long-term lifecycle support.
Supply support for UJA1078TW/5V0,118 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 electronics and functional safety certification.
The UJA1078TW/5V0,118 belongs to NXP's System Basis Chip product line, designed specifically to consolidate power management, communication interfaces, and safety monitoring into a single IC for automotive electronic control units - reducing design complexity and improving system robustness.
FAQ
What is the operating voltage range for UJA1078TW/5V0,118 during engine cranking?
The UJA1078TW/5V0,118 supports VBAT down to 4.5 V for the main V1 regulator and 5.5 V for the V2 regulator during cranking, complying with ISO 7637 pulse 4/4b and ISO 16750-2 specifications. This ensures uninterrupted operation of the microcontroller (via V1) and CAN transceiver (via V2) under severe battery sag conditions. UJA1078TW/5V0,118 maintains stable 5 V outputs and full wake-up capability throughout this range.
Does UJA1078TW/5V0,118 include a watchdog timer, and how is it configured?
Yes, UJA1078TW/5V0,118 includes a programmable watchdog with Window, Timeout, and Off modes, clocked by an on-chip oscillator independent of V1/V2. Configuration is performed via the WD_and_Status register (address 0x0000), where bits WMC select mode and NWP sets period (default 128 ms). The WDOFF pin provides hardware disable capability. UJA1078TW/5V0,118 supports automatic re-enable after interrupt events per automotive safety requirements.
How does the dual-LIN interface in UJA1078TW/5V0,118 support different LIN versions?
UJA1078TW/5V0,118 integrates two fully compliant LIN 2.1 transceivers that also support SAE J2602 and are downward-compatible with LIN 2.0 and LIN 1.3. Each LIN channel operates independently with selectable slope control (normal 20 kbit/s or low-slope 10.4 kbit/s) for EMC optimization. UJA1078TW/5V0,118 handles protocol framing externally via MCU - the transceivers manage only physical layer signaling and wake detection.
Can UJA1078TW/5V0,118 drive external PNP transistors, and what is the purpose?
Yes, UJA1078TW/5V0,118 supports external PNP transistor augmentation of its 5 V/250 mA V1 regulator via dedicated VEXCTRL (base drive) and VEXCC (collector current sense) pins. This distributes thermal load across the PCB, preventing localized heating in high-current ECU applications. Threshold current for PNP activation is configurable (50/85 mA rising, 15/50 mA falling) via PDC bit in Mode_Control register. UJA1078TW/5V0,118 retains full regulation accuracy and undervoltage monitoring regardless of PNP usage.
What automotive EMC and protection standards does UJA1078TW/5V0,118 meet?
UJA1078TW/5V0,118 meets stringent automotive EMC requirements including ±8 kV HBM ESD on CAN/LIN/WAKE pins, ±6 kV IEC 61000-4-2 contact discharge, ±58 V short-circuit proof bus pins, and ISO 7637-3 transient immunity. It also complies with ISO 11898-2/5 (CAN) and SAE J2602 (LIN) physical layer standards. These specifications ensure robust operation in harsh vehicle environments without additional external protection components. UJA1078TW/5V0,118 is qualified per AEC-Q100 Grade 1 requirements.
UJA1078TW/5V0,118 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:
- Obsolete
- Applications:
- -
- Interface:
- CAN, LIN
- Voltage - Supply:
- 4.5V ~ 28V
- Supplier Device Package:
- 32-HTSSOP
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
UJA1078TW/5V0,118 FAQ
1.How can I place an order for UJA1078TW/5V0,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for UJA1078TW/5V0,118 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 UJA1078TW/5V0,118 reliable?
The price and inventory of UJA1078TW/5V0,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UJA1078TW/5V0,118 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UJA1078TW/5V0,118 transactions.
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UJA1078TW/5V0,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UJA1078TW/5V0,118 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 UJA1078TW/5V0,118?
For technical support, including UJA1078TW/5V0,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UJA1078TW/5V0,118 requirements.
6.How does Aetrix verify that UJA1078TW/5V0,118 is sourced from the original manufacturer or authorized distributors?
All UJA1078TW/5V0,118 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 UJA1078TW/5V0,118 meets industry standards.
7.What is the process for return or replacement of UJA1078TW/5V0,118?
All UJA1078TW/5V0,118 units undergo pre-shipment inspection (PSI). If there is an issue with UJA1078TW/5V0,118, 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 UJA1078TW/5V0,118 part is unused and in its original packaging.
Return procedure for UJA1078TW/5V0,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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