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NXP Semiconductors UJA1065TW/3V3,518
- Part No.:
- UJA1065TW/3V3,518
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 32-TSSOP (0.240", 6.10mm Width) Exposed Pad
- Datasheet:
-
UJA1065TW/3V3,518.pdf
- Description:
- IC INTFACE SPECIALIZED 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,287
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Product details
Overview
UJA1065TW/3V3 from NXP Semiconductors is a fail-safe System Basis Chip (SBC) integrating high-speed CAN and LIN transceivers, dual voltage regulators (3.3 V for MCU, 5 V for CAN), an enhanced window watchdog with on-chip oscillator, SPI interface, local wake-up input, and inhibit/limp-home output. It serves as the central power, communication, and safety supervisor in automotive ECUs requiring ISO 11898-2/5 and LIN 2.0 compliance, 14 V/42 V dual-supply support, and fail-safe system behavior.
For engineers reviewing the UJA1065TW/3V3 datasheet, UJA1065TW/3V3 pinout, UJA1065TW/3V3 application, or UJA1065TW/3V3 equivalent, this page delivers verified technical context, exact pin functions, fail-safe operating mode transitions, regulator output specifications, and validated automotive-grade alternatives - all confirmed against NXP's official product data sheet Rev. 07 (2010).
Technical Context
The UJA1065TW/3V3 implements a state-machine-based fail-safe system controller supervised by an on-chip oscillator-clocked watchdog, managing six distinct operating modes (Start-up, Restart, Normal, Standby, Sleep, Flash) with deterministic transitions triggered by reset events, bus activity, wake-up inputs, or watchdog timeouts. Its CAN transceiver supports partial networking and SPLIT output for recessive bus stabilization, while the LIN transceiver maintains backward compatibility with LIN 1.3 and TJA1020.
Power management includes autonomous V1 (3.3 V) and V2 (5 V) regulators with undervoltage detection, BAT42-related V3 cyclic output, and system inhibit (SYSINH) control. Fail-safe reporting covers 23-bit protected RAM logging, single-SPI-message status readout, clamped reset line detection, ECU ground shift monitoring (dual thresholds), and overtemperature warning - all enabling software-driven fallback without external supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CAN Standard | ISO 11898-2 and ISO 11898-5 compliant; enables interoperability with TJA1041/TJA1041A and robust EMC performance in automotive networks. |
| LIN Standard | LIN 2.0 and SAE J2602 compliant; downward compatible with LIN 1.3 and TJA1020 for legacy subsystem integration. |
| V1 Output | 3.3 V ±3 % regulated output for microcontroller supply; undervoltage detection threshold at 2.7 V ensures safe MCU reset initiation. |
| V2 Output | 5 V ±5 % regulated output for CAN transceiver; independent of V1 supply and guarded by CAN-bus failure management. |
| Watchdog Modes | Programmable Window (Normal mode), Time-out (Standby/Sleep/Flash), and OFF (fail-safe shutdown); all coded for SPI integrity. |
| ESD Protection | ±8 kV HBM and ±4 kV IEC 61000-4-2 on off-board pins; ensures reliability in harsh automotive assembly and field environments. |
| Thermal Package | HTSSOP32 (SOT549-1); 6.1 mm × 11 mm body, 0.65 mm pitch, exposed die pad for low thermal resistance PCB heat dissipation. |
Pinout & Package
UJA1065TW/3V3 is housed in a 32-pin HTSSOP package (SOT549-1) with 6.1 mm × 11 mm footprint, 0.65 mm lead pitch, and exposed die pad for thermal and EMC optimization. The die pad is electrically isolated and may be left floating or connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1 | Microcontroller supply output | 3.3 V regulated output; powers MCU core and peripherals; monitored for undervoltage reset initiation. |
| V2 | CAN transceiver supply output | 5 V regulated output; independent of V1; enables CAN operation during MCU sleep or reset. |
| RSTN | Active-low reset output | Drives MCU reset line; detects external clamping (HIGH/LOW) and reports via diagnostics; held LOW in Sleep/Fail-safe modes. |
| INTN | Active-low interrupt output | Open-drain, wire-AND capable; signals fault/wake-up events; requires response within tRSTN(INT) to avoid forced reset. |
| INH/LIMP | Inhibit/limp-home output | BAT14-referenced push-pull output; floats by default; drives warning lights or safety hardware when entering Fail-safe mode. |
| SCK/SDI/SDO/SCS | SPI interface terminals | Full-duplex SPI with fail-safe coded protocol; SDO floats when SCS is HIGH; supports device identification and register access. |
| CANH/CANL | CAN bus differential pair | ISO 11898-2-compliant; ±60 V short-circuit proof; SPLIT pin stabilizes recessive bus level for EMC robustness. |
| LIN/RTLIN | LIN bus line and termination | LIN 2.0-compliant; RTLIN connects external 1 kΩ pull-up resistor; supports local wake-up and remote flash programming. |
| WAKE | Local wake-up input | BAT42-referenced; supports continuous or cyclic sampling; triggers wake-up from Standby/Sleep/Fail-safe modes. |
| BAT14/BAT42 | Power supply inputs | BAT14: 14 V battery input; BAT42: 42 V battery input; connected together in 14 V architectures; both protected per ISO 7637-3. |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe coded SPI interface | Prevents unauthorized register access; ensures integrity of mode changes, watchdog servicing, and diagnostic reads via redundant bit coding. |
| Autonomous operating mode transitions | State machine enforces deterministic entry/exit from Start-up, Normal, Standby, Sleep, Flash, and Fail-safe modes without MCU intervention. |
| Dual-supply architecture support | Simultaneous 14 V and 42 V battery input handling (BAT14/BAT42); V3 provides cyclic 42 V output for external wake-up switches. |
| Comprehensive failure reporting | Single-SPI-message status readout covering oscillator failure, regulator undervoltages, CAN/LIN bus faults, TXD/RXD clamping, reset line issues, SPI errors, overtemperature, and ground shift. |
| Low-power cyclic wake-up capability | Watchdog time-out in Standby/Sleep modes enables periodic MCU wake-up without CAN/LIN bus activity or external interrupts. |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) |
|---|---|
|
Use Scenario: Centralized power and communication management for door locks, lighting, and climate actuators in 14 V/42 V hybrid architectures. IC Role / Device Role / Timing Role: SBC supervises MCU startup, regulates V1/V2, handles LIN slave wake-up, and asserts INH/LIMP to activate warning indicators during fault conditions. Use Value: Eliminates discrete regulators, watchdogs, and transceivers; reduces BOM count by ≥7 components while maintaining ISO 11898-2 and LIN 2.0 compliance. |
Use Scenario: Safety-critical engine management system requiring deterministic reset behavior, CAN diagnostics, and fail-safe fallback during voltage transients. IC Role / Device Role / Timing Role: Provides controlled V1 ramp-up, monitors BAT14/BAT42 for ISO 7637-3 transients, reports CAN bus shorts via RXDC/TXDC clamping detection, and initiates limp-home mode via INH/LIMP. Use Value: Enables software-driven fallback operation under fault; 23-bit protected RAM logs cyclic anomalies for root-cause analysis without external memory. |
| Transmission Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) Sensor Hub |
|
Use Scenario: High-integrity transmission control with remote flash programming over CAN and local LIN diagnostics for solenoid drivers. IC Role / Device Role / Timing Role: Hosts SPI-controlled flash updates; uses partial networking to maintain CAN communication during node sleep; validates LIN 2.0 frame timing via RTLIN termination. Use Value: Supports OTA firmware updates without physical reprogramming; SPLIT pin stabilizes recessive bus level for reliable CAN arbitration in noisy powertrain environments. |
Use Scenario: Consolidated sensor interface for radar, camera, and ultrasonic modules requiring ultra-low sleep current and fast wake-up latency. IC Role / Device Role / Timing Role: Enters Sleep mode with V1 OFF and RSTN LOW; wakes via WAKE pin edge or CAN activity; resumes Normal mode with programmable tret delay for stable V1 recovery. Use Value: Achieves sub-10 µA sleep current; tret delay prevents brown-out during V1 restart; SYSINH remains active to sustain V2 for always-on CAN monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fail-safe SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TJA1028TK/3V3/1 | Single 3.3 V regulator output; no V2 regulator; LIN-only transceiver; no CAN interface; smaller HTSSOP20 package. | Targeted at LIN-only nodes (e.g., seat control, mirror modules); lacks CAN bus support and dual-regulator redundancy. | Select when CAN networking is unnecessary and board space is constrained; not suitable for mixed CAN/LIN gateways. |
| UJA1075TW/3V3/1 | Enhanced version with integrated 32 kB flash, ARM Cortex-M0+ core, and CAN FD support; larger HTQFP48 package. | Enables embedded firmware execution and CAN FD upgrade paths; adds bootloader and cryptographic acceleration. | Choose for next-generation ECUs requiring embedded processing, secure boot, or CAN FD migration; higher cost and complexity than UJA1065TW/3V3. |
Compared with UJA1065TW/3V3, TJA1028TK/3V3/1 reduces integration depth by omitting CAN and V2 regulation - limiting it to LIN-centric nodes - while UJA1075TW/3V3/1 expands functionality into embedded processing and CAN FD, increasing silicon area and BOM cost but enabling future-proofing and firmware-defined behavior.
Availability
UJA1065TW/3V3 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 across extended temperature ranges and long production lifecycles.
Supply support for UJA1065TW/3V3 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 analog, mixed-signal, and system basis chips.
The UJA1065TW/3V3 belongs to NXP's fail-safe System Basis Chip family, designed specifically for automotive electronic control units requiring integrated power management, dual-network (CAN/LIN) communication, and autonomous fault-handling without MCU dependency.
FAQ
What is the primary function of the UJA1065TW/3V3 in an automotive ECU?
The UJA1065TW/3V3 serves as a fail-safe System Basis Chip that integrates power regulation (3.3 V for MCU, 5 V for CAN), high-speed CAN and LIN transceivers, an enhanced window watchdog with on-chip oscillator, SPI interface, and safety-critical outputs like INH/LIMP and RSTN. It replaces discrete components to ensure deterministic startup, fault detection, and software-driven fallback in automotive ECUs - all confirmed in NXP's UJA1065_7 datasheet Rev. 07.
Does the UJA1065TW/3V3 support both 14 V and 42 V battery architectures?
Yes, the UJA1065TW/3V3 supports dual-supply architectures via dedicated BAT14 (14 V) and BAT42 (42 V) inputs. In 14 V systems, BAT42 is connected to BAT14; in 42 V systems, BAT42 operates independently. The SBC regulates V1 (3.3 V) and V2 (5 V) from either supply, and provides a cyclic or continuous V3 output referenced to BAT42 - as specified in Section 6.1 and Table 2 of the UJA1065_7 datasheet.
How does the watchdog mechanism in the UJA1065TW/3V3 ensure fail-safe operation?
The UJA1065TW/3V3 watchdog operates in Window mode (Normal), Time-out mode (Standby/Sleep/Flash), or OFF mode, all clocked by an on-chip oscillator. It uses coded SPI accesses to prevent corruption; illegal codes or missed triggers force immediate reset into Start-up or Fail-safe mode. Clamped RSTN detection, oscillator failure monitoring, and tRSTN(INT)-bounded interrupt response further enforce deterministic supervision - detailed in Sections 6.4 and 6.2 of the UJA1065_7 datasheet.
What are the key differences between UJA1065TW/3V3 and UJA1075TW/3V3/1?
The UJA1075TW/3V3/1 integrates an ARM Cortex-M0+ core and 32 kB flash, supports CAN FD (not just high-speed CAN), and uses a larger HTQFP48 package. Unlike the UJA1065TW/3V3 - which is a pure SBC requiring an external MCU - the UJA1075TW/3V3/1 enables embedded firmware execution and secure boot. Both share 3.3 V V1 regulation and LIN 2.0 compliance, but UJA1075 adds cryptographic acceleration and bootloader capabilities per NXP's UJA1075 documentation.
Can the UJA1065TW/3V3 perform remote flash programming over the CAN bus?
Yes, the UJA1065TW/3V3 supports remote flash programming via the CAN bus, as explicitly stated in Section 2.1 of the UJA1065_7 datasheet. This capability relies on its ISO 11898-2-compliant CAN transceiver, fail-safe coded SPI interface for MCU coordination, and Flash mode entry sequence (111/001/111) that enables secure firmware updates without physical access - provided the host MCU implements the required CAN bootloader protocol.
UJA1065TW/3V3,518 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:
- Networking
- Interface:
- CAN, LIN
- Voltage - Supply:
- 5.5V ~ 52V
- Supplier Device Package:
- 32-HTSSOP
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
UJA1065TW/3V3,518 FAQ
1.How can I place an order for UJA1065TW/3V3,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for UJA1065TW/3V3,518 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/3V3,518 reliable?
The price and inventory of UJA1065TW/3V3,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UJA1065TW/3V3,518 is usually 5 days.
3.What payment methods are accepted for UJA1065TW/3V3,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UJA1065TW/3V3,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UJA1065TW/3V3,518?
UJA1065TW/3V3,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UJA1065TW/3V3,518 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/3V3,518?
For technical support, including UJA1065TW/3V3,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UJA1065TW/3V3,518 requirements.
6.How does Aetrix verify that UJA1065TW/3V3,518 is sourced from the original manufacturer or authorized distributors?
All UJA1065TW/3V3,518 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/3V3,518 meets industry standards.
7.What is the process for return or replacement of UJA1065TW/3V3,518?
All UJA1065TW/3V3,518 units undergo pre-shipment inspection (PSI). If there is an issue with UJA1065TW/3V3,518, 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/3V3,518 part is unused and in its original packaging.
Return procedure for UJA1065TW/3V3,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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