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NXP Semiconductors UJA1065TW/5V0/512
- Part No.:
- UJA1065TW/5V0/512
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 32-TSSOP (0.240", 6.10mm Width) Exposed Pad
- Datasheet:
-
UJA1065TW/5V0/512.pdf
- Description:
- IC INTFACE SPECIALIZED 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,349
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Product details
Overview
UJA1065TW/5V0/512 from NXP Semiconductors is a fail-safe System Basis Chip (SBC) integrating high-speed CAN and LIN transceivers, dual voltage regulators (5.0 V for MCU and 5 V for CAN), an enhanced window watchdog with on-chip oscillator, SPI interface, and limp-home output. It serves as the central power, communication, and safety supervisor in automotive ECUs operating in 14 V or 42 V architectures.
For engineers reviewing the UJA1065TW/5V0/512 datasheet, UJA1065TW/5V0/512 pinout, UJA1065TW/5V0/512 application, or UJA1065TW/5V0/512 equivalent, key selection criteria include ISO 11898-2/ISO 11898-5 CAN compliance, LIN 2.0/SJ2602 support, fail-safe mode behavior, 32-pin HTSSOP package thermal performance, and 5.0 V microcontroller regulator output specification.
Technical Context
The UJA1065TW/5V0/512 implements a state-machine-based fail-safe system controller clocked by an on-chip oscillator, managing six distinct operating modes (Start-up, Restart, Normal, Standby, Sleep, Flash) with deterministic transitions triggered by reset events, watchdog timeouts, bus activity, or local wake-up. Its SPI interface uses fail-safe coded 16-bit messaging for register access and status reporting.
It integrates two independent transceivers: a high-speed CAN transceiver with SPLIT pin for recessive bus stabilization and partial networking support, and a LIN transceiver compliant with LIN 2.0 and SAE J2602, both featuring ±60 V short-circuit protection and bus-float capability when unpowered. The device supports remote flash programming via CAN and provides 23 bits of access-protected RAM for diagnostic logging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CAN Standard | ISO 11898-2 and ISO 11898-5 compliant; ensures interoperability with TJA1041/TJA1041A and robust EMC in automotive networks. |
| LIN Standard | LIN 2.0 and SAE J2602 compliant; backward compatible with LIN 1.3 and TJA1020 for legacy sub-bus integration. |
| MCU Supply | 5.0 V regulated output (V1); fixed version per UJA1065TW/5V0 designation; powers external microcontroller with low dropout and undervoltage monitoring. |
| CAN Supply | 5 V dedicated regulator (V2); isolated from MCU supply and guarded by CAN-bus failure management to improve EMC. |
| Watchdog Type | Programmable fail-safe coded window and time-out watchdog; clocked by on-chip oscillator; prevents software deadlock with strict timing enforcement. |
| Package | HTSSOP32 (SOT549-1); 6.1 mm × 11 mm body, 0.65 mm pitch, exposed die pad for thermal dissipation and EMC optimization. |
| ESD Protection | ±8 kV HBM and ±4 kV IEC 61000-4-2 on off-board pins; meets automotive EMC requirements for harsh environments. |
| Bus Fault Tolerance | ±60 V short-circuit proof on CAN/LIN bus pins; battery and bus pins protected per ISO 7637-3 transients. |
Pinout & Package
UJA1065TW/5V0/512 is housed in a 32-pin HTSSOP package (SOT549-1) with 6.1 mm × 11 mm footprint, 0.65 mm lead pitch, and an exposed die pad for enhanced thermal conduction and EMC performance. The pad may be left floating or connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1 | Microcontroller supply output | 5.0 V regulated output; powers MCU core; monitored for undervoltage detection and fail-safe response. |
| V2 | CAN transceiver supply output | 5 V dedicated regulator output; independent of V1; improves CAN bus EMC and fault isolation. |
| RSTN | Reset output | Active-low open-drain reset signal to MCU; detects clamping conditions and initiates controlled start-up sequences. |
| INTN | Interrupt output | Active-low open-drain interrupt to MCU; wire-AND capable; signals faults including bus errors, overtemperature, and regulator failures. |
| INH/LIMP | Inhibit/limp-home output | BAT14-related push-pull output; floats by default; drives warning lights or failsafe hardware when system enters Fail-safe mode. |
| SCK/SDI/SDO/SCS | SPI interface | Full-duplex SPI bus (clock, input, output, chip select); uses fail-safe coded protocol for reliable register access and status reporting. |
| TXDC/RXDC | CAN data interface | CMOS-level inputs/outputs connecting to MCU's CAN controller; enable bidirectional high-speed CAN communication. |
| CANH/CANL | CAN bus interface | Differential bus lines compliant with ISO 11898-2; support dominant/recessive states and partial networking wake-up. |
| TXDL/RXDL | LIN data interface | CMOS-level LIN transmit/receive signals; interface directly with MCU's LIN controller or UART peripheral. |
| LIN/RTLIN | LIN bus interface | LIN bus line and internal termination resistor connection; enables single-wire LIN communication with built-in biasing. |
| WAKE | Local wake-up input | BAT42-related input; supports continuous or cyclic sampling to trigger wake-up from Standby/Sleep modes without bus traffic. |
| BAT14/BAT42 | Power supply inputs | Separate 14 V and 42 V battery inputs; allows operation in dual-voltage architectures; BAT42 connects to BAT14 in 14 V-only systems. |
| SYSINH | System inhibit output | BAT42-related output; controls external DC-DC converters or power domains during mode transitions. |
| V3 | Unregulated 42 V output | BAT42-derived output; configurable as continuous, OFF, or cyclic mode synchronized with WAKE for external load control. |
| SENSE | Battery interrupt input | Fast battery chatter detector input; enables rapid response to battery connection/disconnection events. |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe state machine | Hardware-enforced six-mode operation (Start-up, Restart, Normal, Standby, Sleep, Flash) with deterministic transitions and reset-source reporting for robust ECU boot and recovery. |
| Fail-safe SPI interface | 16-bit coded SPI protocol prevents misconfiguration; enables single-message status reporting (23-bit protected RAM, fault flags, mode info) without frame assembly. |
| Partial networking support | CAN transceiver supports global wake-up without waking sleeping nodes; reduces system-wide current consumption during selective communication. |
| Limp-home activation | INH/LIMP output asserts in Fail-safe mode to drive external warning lights or safety-critical hardware without MCU intervention. |
| Cyclic wake-up capability | Watchdog and WAKE pin support periodic wake-up from Standby/Sleep modes; enables ultra-low-power monitoring while preserving RAM content. |
| Integrated diagnostics | Detects and reports 12+ fault types including oscillator failure, bus shorts/opens, TXD/RXD clamping, reset line faults, SPI errors, overtemperature, and ground shift. |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) |
|---|---|
Use Scenario: Centralized vehicle subsystem coordination including door locks, lighting, and climate control via CAN backbone and LIN sub-nodes. IC Role / Device Role / Timing Role: UJA1065TW/5V0/512 acts as primary power supervisor, CAN/LIN gateway, and fail-safe monitor-ensuring defined start-up, safe shutdown, and diagnostic reporting across distributed sensors and actuators. Use Value: Enables deterministic boot sequencing, remote flash updates over CAN, and limp-home activation of hazard lights during critical faults-meeting ASIL-B functional safety requirements. | Use Scenario: Real-time engine management requiring high-integrity communication between MCU, sensors (MAP, crankshaft), and actuators (injectors, ignition) under extreme temperature and EMI conditions. IC Role / Device Role / Timing Role: UJA1065TW/5V0/512 supplies regulated 5.0 V to MCU, isolates CAN transceiver power, monitors bus integrity, and enforces watchdog supervision to prevent runaway code execution. Use Value: Provides ±60 V bus fault tolerance, ISO 7637-3 transient protection, and detailed fault logging-reducing field failure root-cause analysis time by enabling post-event diagnostic retrieval via SPI. |
| Transmission Control Module (TCM) | Advanced Driver Assistance Systems (ADAS) Sensor Hub |
Use Scenario: Gearbox control unit interfacing with torque converter, solenoids, and gear position sensors using CAN for main network and LIN for low-cost sensor clusters. IC Role / Device Role / Timing Role: UJA1065TW/5V0/512 delivers stable 5.0 V MCU supply, manages CAN/LIN physical layers, and executes fail-safe transitions (e.g., entering Limp-home upon CAN bus failure). Use Value: Guarantees safe degradation paths (e.g., forced neutral gear engagement) via INH/LIMP output and preserves critical calibration data in protected RAM during brownout events. | Use Scenario: Aggregation and preprocessing of radar, camera, and ultrasonic sensor data before forwarding to central ADAS domain controller via high-speed CAN FD backbone. IC Role / Device Role / Timing Role: UJA1065TW/5V0/512 serves as power and communication foundation for edge sensor nodes-providing low-quiescent-current Sleep mode, cyclic wake-up for sensor polling, and robust LIN connectivity to passive sensors. Use Value: Achieves <100 µA sleep current with wake-on-LIN/CAN activity, enabling always-on sensor readiness while meeting OEM battery drain targets for parked vehicle scenarios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fail-safe SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UJA1075TW/5V0/512 | Successor device with extended CAN FD support, higher V3 drive capability (1.5 A vs. 0.5 A), and updated watchdog configuration registers. | Required for new designs targeting CAN FD communication or higher-current external loads; not drop-in due to register map changes and pinout revision. | Select UJA1075TW/5V0/512 for CAN FD-enabled platforms or where >0.5 A V3 drive is needed; retain UJA1065TW/5V0/512 for legacy 11-bit CAN and cost-sensitive 14 V systems. |
| TJA1021T/CM | Standalone LIN transceiver only; lacks CAN, regulators, watchdog, SPI, and fail-safe logic-requires external components to replicate UJA1065TW/5V0/512 functionality. | Suitable only for LIN-only nodes without safety-critical supervision; cannot replace UJA1065TW/5V0/512 in integrated ECU roles. | Choose TJA1021T/CM only for simple LIN slave nodes; UJA1065TW/5V0/512 remains necessary where integrated power, CAN, and fail-safe supervision are required. |
Compared with UJA1075TW/5V0/512, the UJA1065TW/5V0/512 offers proven reliability in mature 11-bit CAN architectures but lacks CAN FD and higher V3 drive; versus TJA1021T/CM, it delivers full SBC integration-eliminating board space, BOM count, and qualification effort for multi-function ECUs.
Availability
UJA1065TW/5V0/512 is available at Aetrix Electronics and suitable for automotive Body Control Modules, Engine Control Units, Transmission Control Modules, and ADAS sensor hubs requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified reliability.
Supply support for UJA1065TW/5V0/512 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-grade mixed-signal ICs.
The UJA1065TW/5V0/512 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 primary function of the UJA1065TW/5V0/512 in an automotive ECU?
The UJA1065TW/5V0/512 serves as a fail-safe System Basis Chip that integrates high-speed CAN and LIN transceivers, dual voltage regulators (5.0 V for MCU and 5 V for CAN), an enhanced watchdog, SPI interface, and limp-home output. It replaces discrete components to provide centralized power management, communication interfacing, and autonomous fault detection-ensuring safe and predictable ECU behavior across all operating modes. Its design enables deterministic start-up, robust bus communication, and graceful degradation during faults.
Does the UJA1065TW/5V0/512 support both 14 V and 42 V automotive battery architectures?
Yes, the UJA1065TW/5V0/512 is explicitly designed for dual-voltage operation. It accepts separate BAT14 (14 V) and BAT42 (42 V) inputs, allowing use in conventional 14 V systems (with BAT42 tied to BAT14) or advanced 42 V architectures. Its V3 output is BAT42-related and configurable in continuous, OFF, or cyclic mode-supporting external 42 V loads like relays or wake-up switches. This dual-supply capability makes UJA1065TW/5V0/512 suitable for scalable ECU designs across vehicle platforms.
How does the fail-safe watchdog in the UJA1065TW/5V0/512 differ from standard watchdog timers?
The UJA1065TW/5V0/512 features a programmable fail-safe coded watchdog clocked by an on-chip oscillator, supporting Start-up, Window, Time-out, and OFF modes. Unlike generic watchdogs, it uses redundant bit coding for all SPI accesses-only ten valid period codes and six valid mode codes are accepted. Illegal triggers cause immediate reset. In Normal mode, it enforces strict timing windows (50–100% of period); early or late servicing forces entry into Start-up mode. This architecture prevents software lockup and ensures deterministic recovery-core to UJA1065TW/5V0/512's role in ASIL-B–capable systems.
What are the key differences between the UJA1065TW/5V0/512 and the UJA1075TW/5V0/512?
The UJA1075TW/5V0/512 is the functional successor to the UJA1065TW/5V0/512, adding CAN FD support, increasing V3 output drive capability to 1.5 A (vs. 0.5 A), and updating register mapping and watchdog configuration logic. While both share identical pinout and core SBC functionality, UJA1075TW/5V0/512 is not pin-compatible due to revised pin assignments and requires firmware adaptation. UJA1065TW/5V0/512 remains optimal for cost-sensitive 11-bit CAN applications where CAN FD is unnecessary and legacy qualification is required.
Can the UJA1065TW/5V0/512 perform remote firmware updates over the CAN bus?
Yes, the UJA1065TW/5V0/512 supports remote flash programming via the CAN bus. Its fail-safe architecture enables secure entry into Flash mode through a three-step SPI handshake (111→001→111 sequence), after which the microcontroller can execute firmware updates. During Flash mode, the watchdog operates in time-out mode with strict code validation (only 111 allowed for servicing), and improper access triggers immediate reset. This capability allows OEMs to deploy over-the-air (OTA) updates while maintaining functional safety-making UJA1065TW/5V0/512 suitable for modern connected vehicle ECUs.
UJA1065TW/5V0/512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-TSSOP (0.240", 6.10mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Networking
- Interface:
- SPI Serial
- Voltage - Supply:
- 5.5V ~ 52V
- Supplier Device Package:
- 32-HTSSOP
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
UJA1065TW/5V0/512 FAQ
1.How can I place an order for UJA1065TW/5V0/512 through Aetrix?
Please submit a Request for Quotation (RFQ) for UJA1065TW/5V0/512 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 UJA1065TW/5V0/512 reliable?
The price and inventory of UJA1065TW/5V0/512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UJA1065TW/5V0/512 is usually 5 days.
3.What payment methods are accepted for UJA1065TW/5V0/512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UJA1065TW/5V0/512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UJA1065TW/5V0/512?
UJA1065TW/5V0/512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UJA1065TW/5V0/512 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 UJA1065TW/5V0/512?
For technical support, including UJA1065TW/5V0/512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UJA1065TW/5V0/512 requirements.
6.How does Aetrix verify that UJA1065TW/5V0/512 is sourced from the original manufacturer or authorized distributors?
All UJA1065TW/5V0/512 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 UJA1065TW/5V0/512 meets industry standards.
7.What is the process for return or replacement of UJA1065TW/5V0/512?
All UJA1065TW/5V0/512 units undergo pre-shipment inspection (PSI). If there is an issue with UJA1065TW/5V0/512, 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 UJA1065TW/5V0/512 part is unused and in its original packaging.
Return procedure for UJA1065TW/5V0/512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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