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NXP Semiconductors UJA1069TW24/5V0/C:
- Part No.:
- UJA1069TW24/5V0/C:
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
UJA1069TW24/5V0/C:.pdf
- Description:
- IC INTFACE SPECIALIZED 24HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
UJA1069TW24/5V0/C from NXP Semiconductors is a fail-safe System Basis Chip (SBC) integrating LIN 2.0 transceiver, 5.0 V microcontroller voltage regulator, enhanced window/watchdog timer with on-chip oscillator, full-duplex SPI interface, and local wake-up input. It operates in 14 V and 42 V automotive architectures and delivers limp-home output for safety-critical ECU behavior during fault conditions.
For engineers reviewing the UJA1069TW24/5V0/C datasheet, UJA1069TW24/5V0/C pinout, UJA1069TW24/5V0/C application, or UJA1069TW24/5V0/C equivalent, key selection criteria include LIN 2.0/SJ2602 compliance, 5.0 V regulated output capability, HTSSOP24 package footprint, fail-safe state machine behavior, and cyclic wake-up support in Standby/Sleep modes.
Technical Context
The UJA1069TW24/5V0/C implements a deterministic fail-safe state machine with seven defined operating modes (Start-up, Restart, Normal, Standby, Sleep, Flash, Fail-safe), each governed by watchdog supervision and reset source tracking. Its on-chip oscillator directly clocks the watchdog and internal timers, enabling autonomous supervision without external timing components.
Power management includes dual-supply support (BAT14 and BAT42), V1 regulator (5.0 V ±2%), V3 unregulated 42 V output with cyclic mode, and current-threshold-based watchdog enable/disable logic tied to microcontroller supply current (IthL/IthH). The LIN transceiver supports dominant/recessive level detection, short-circuit protection (±60 V), and ISO 7637-3 transient immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LIN Compliance | LIN 2.0 and SAE J2602 compliant; backward compatible with LIN 1.3 and TJA1020 - ensures interoperability in legacy and modern LIN networks. |
| V1 Output | 5.0 V ±2% regulated output at up to 150 mA - powers microcontroller with tight tolerance and sufficient current for typical automotive MCUs. |
| Watchdog Modes | Programmable Window (Normal mode), Time-out (Standby/Sleep/Flash), and OFF (current-threshold gated) - enables precise software supervision and low-power cyclic wake-up. |
| SPI Interface | Fail-safe coded 16-bit full-duplex SPI with maskable interrupt - provides robust host communication with error detection and diagnostics reporting in single frame. |
| Package | HTSSOP24 (SOT864-1), 6.4 mm × 7.8 mm, 0.65 mm pitch, exposed die pad - enables compact PCB layout and efficient thermal dissipation via PCB copper. |
| ESD Protection | ±8 kV HBM (off-board pins), ±4 kV IEC 61000-4-2 - meets automotive EMC requirements for handling and system-level surge immunity. |
| Wake-up Sources | Local WAKE pin (BAT42-related, cyclic sampling), LIN bus activity, and V3 overload - supports multiple independent entry paths from ultra-low-power Sleep mode. |
Pinout & Package
UJA1069TW24/5V0/C uses the HTSSOP24 package (SOT864-1): plastic thermal enhanced thin shrink small outline, 24 leads, 4.4 mm body width, 0.65 mm lead pitch, and exposed die pad for thermal and EMC performance. The die pad is electrically isolated and may be connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| n.c. | Not connected | No internal connection; must remain unconnected per design rules. |
| BAT42 | 42 V battery supply input | Connects to 42 V rail in dual-supply systems; tied to BAT14 in 14 V-only applications. |
| TXDL | LIN transmit data input | Drives LIN bus dominant (LOW) or recessive (HIGH); logic-level input referenced to V1. |
| SENSE | Battery interrupt / chatter detector | Fast edge-sensitive input for detecting battery supply instability or contact bounce. |
| V1 | Microcontroller voltage regulator output | 5.0 V ±2% regulated supply delivering up to 150 mA; monitored for undervoltage and overcurrent. |
| V3 | Unregulated 42 V output | Switched BAT42 output for external loads (e.g., relays); supports continuous or cyclic operation synchronized with WAKE. |
| RXDL | LIN receive data output | Reflects LIN bus state: LOW = dominant, HIGH = recessive; open-drain output referenced to V1. |
| SYSINH | System inhibit output | BAT42-related push-pull signal for controlling external DC-DC converters or power domains. |
| RSTN | Reset output to microcontroller | Active-LOW bidirectional reset line; detects clamping and reports reset source via SPI register. |
| INTN | Interrupt output to microcontroller | Active-LOW open-drain interrupt; wire-AND capable for multi-interrupt ECU designs. |
| EN | Enable output | Active-HIGH push-pull enable signal; driven LOW during reset or watchdog overflow to disable peripherals. |
| SDI | SPI data input | MOSI input for SPI communication; accepts fail-safe coded 16-bit command frames. |
| SDO | SPI data output | MISO output; floats when SCS is HIGH to prevent bus contention. |
| SCK | SPI clock input | Master-generated clock; synchronizes all SPI transfers including watchdog service and mode changes. |
| SCS | SPI chip select input | Active-LOW enable for SPI interface; required to initiate any register access or configuration change. |
| TEST | Test pin | Must be connected to GND in production; used for factory test and calibration. |
| INH/LIMP | Inhibit / limp-home output | BAT14-related push-pull output; defaults floating; drives warning lights or failsafe hardware when entering Fail-safe mode. |
| WAKE | Local wake-up input | BAT42-related digital input with cyclic sampling capability; triggers wake-up from Standby/Sleep without LIN traffic. |
| GND | Ground reference | Main system ground return; connects to exposed die pad for optimal thermal and EMC performance. |
| LIN | LIN bus line | Direct connection to LIN physical bus; supports dominant (LOW) and recessive (HIGH) states with ±60 V short-circuit protection. |
| RTLIN | LIN-bus termination resistor connection | Provides external 1 kΩ pull-up to V1 for LIN bus biasing; required for proper LIN electrical layer operation. |
| BAT14 | 14 V battery supply input | Main power input for 14 V architectures; supplies internal regulators and logic; protected per ISO 7637-3. |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe state machine | Seven deterministic operating modes with automatic transitions based on watchdog status, reset events, and supply conditions - eliminates software deadlocks and guarantees defined recovery paths. |
| Fail-safe coded SPI | 16-bit command framing with redundant bit coding prevents miswrites due to noise or corruption - ensures reliable register access and mode control under EMI stress. |
| Current-threshold watchdog gating | Automatic watchdog enable/disable based on V1 supply current (IthL/IthH) - enables safe watchdog deactivation only when MCU is truly halted, preventing blind supervision gaps. |
| Limp-home output | Dedicated INH/LIMP pin with BAT14-referenced push-pull drive - activates safety hardware (e.g., warning lamps) immediately upon entry into Fail-safe mode without MCU intervention. |
| Remote flash programming | Secure Flash mode entry via triple-coded SPI sequence (111/001/111) - enables in-system firmware updates over LIN bus while maintaining fail-safe integrity. |
Applications
| Body Control Module (BCM) | Seat Control Unit |
|---|---|
Use Scenario: Centralized control of door locks, windows, mirrors, and interior lighting in passenger vehicles. IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C serves as the primary SBC, providing regulated 5.0 V power, LIN communication, watchdog supervision, and limp-home activation for warning indicators during faults. Use Value: Enables fail-safe operation during LIN bus faults or microcontroller hang, ensuring critical functions (e.g., hazard light activation) remain operational without software intervention. | Use Scenario: Motorized seat position adjustment with memory, heating, and occupancy sensing. IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C manages power sequencing, monitors seat motor current via SENSE pin, provides cyclic wake-up from Sleep mode for periodic position checks, and asserts INH/LIMP on overtemperature. Use Value: Delivers 42 V-compatible V3 output to drive seat motors and uses BAT42-related WAKE for low-power occupancy detection - reducing quiescent current below 100 µA in Sleep mode. |
| Roof Module (Sunroof/Climate) | Trunk/Liftgate Actuator |
Use Scenario: Integrated control of sunroof glass/motor, ambient lighting, and HVAC zone actuators in premium vehicle roof modules. IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C supplies 5.0 V to MCU and sensors, interfaces via LIN to body domain controller, uses SYSINH to enable external DC-DC for high-current actuators, and reports overtemperature via SPI. Use Value: Combines LIN transceiver, V1 regulator, and SYSINH control in one HTSSOP24 package - reduces BOM count and PCB area versus discrete solutions while meeting ISO 11898-4 EMC targets. | Use Scenario: Power liftgate with obstacle detection, soft-close, and anti-pinch functionality. IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C provides V3 output to drive liftgate motor H-bridge, monitors LIN bus for command arbitration, uses RSTN clamping detection to identify stuck-reset conditions, and logs fault history in 23-bit protected RAM. Use Value: Integrates LIN 2.0 transceiver with ±60 V bus protection and 23-bit access-protected RAM for cyclic problem logging - supports ASAM MCD-2 MC-compliant diagnostic trace without external memory. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LIN SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UJA1079TW24/5V0/C | Same HTSSOP24 package; adds CAN FD transceiver and higher V1 current (200 mA); no V3 output. | Required where CAN FD backbone integration is needed alongside LIN; unsuitable for 42 V load driving. | Select UJA1079TW24/5V0/C only if CAN FD coexistence is mandatory and V3-driven loads are absent. |
| TLE9471-3ES | HTSSOP32 package; integrates 3x high-side switches and LIN 2.2A transceiver; no on-chip oscillator or fail-safe state machine. | Targets simpler LIN nodes requiring direct load control; lacks autonomous fail-safe behavior and detailed diagnostics reporting. | Choose TLE9471-3ES for cost-sensitive, non-safety-critical LIN slave nodes without need for watchdog-coded SPI or multi-mode supervision. |
Compared with UJA1079TW24/5V0/C and TLE9471-3ES, the UJA1069TW24/5V0/C uniquely balances LIN 2.0 compliance, 42 V-compatible V3 output, autonomous fail-safe state machine, and HTSSOP24 footprint - making it optimal for mid-tier automotive ECUs requiring robust power management and safety-aware operation without CAN integration.
Availability
UJA1069TW24/5V0/C is available at Aetrix Electronics and suitable for Body Control Modules, Seat Control Units, Roof Modules, and Trunk/Liftgate Actuators requiring stable component supply across automotive production lifecycles.
Supply support for UJA1069TW24/5V0/C 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 and mixed-signal ICs.
The UJA1069TW24/5V0/C belongs to NXP's System Basis Chip product line, designed specifically to consolidate LIN ECU peripheral functions - power regulation, communication, supervision, and safety - into a single fail-safe device for 14 V and 42 V automotive architectures.
FAQ
What LIN protocol versions does the UJA1069TW24/5V0/C support?
The UJA1069TW24/5V0/C supports LIN 2.0 and SAE J2602 standards, and maintains backward compatibility with LIN 1.3 and the legacy TJA1020 transceiver. It does not support LIN 2.2A or later revisions. All LIN electrical layer features - including dominant/recessive level detection, short-circuit protection (±60 V), and ISO 7637-3 transient immunity - apply directly to the UJA1069TW24/5V0/C in its HTSSOP24 configuration.
Does the UJA1069TW24/5V0/C include an integrated voltage regulator, and what are its specifications?
Yes, the UJA1069TW24/5V0/C integrates a dedicated voltage regulator delivering 5.0 V ±2% at up to 150 mA to power the host microcontroller. This V1 output is continuously monitored for undervoltage conditions, and its supply current is used to gate the watchdog in Standby mode. The regulator is optimized for automotive environments and supports both 14 V and 42 V input architectures via separate BAT14 and BAT42 pins.
How does the fail-safe state machine in the UJA1069TW24/5V0/C operate across different power modes?
The UJA1069TW24/5V0/C implements a deterministic seven-state fail-safe state machine (Start-up, Restart, Normal, Standby, Sleep, Flash, Fail-safe), with transitions governed by watchdog supervision, reset events, and supply conditions. For example, a V1 undervoltage forces transition to Fail-safe mode, while successful watchdog service in Start-up mode enables entry to Normal mode. Each mode defines specific behavior for RSTN, EN, V1, and LIN - all enforced autonomously without MCU dependency.
What is the purpose and behavior of the INH/LIMP pin on the UJA1069TW24/5V0/C?
INH/LIMP is a BAT14-referenced push-pull output that serves dual roles: as an inhibit signal to disable external peripherals during startup or fault, and as a limp-home output activated automatically upon entry into Fail-safe mode. In Fail-safe mode, it drives warning lights or safety hardware without MCU involvement. Its default floating state prevents unintended activation, and it remains functional even when V1 is disabled - ensuring fail-operational behavior for critical alerts.
Can the UJA1069TW24/5V0/C support remote firmware updates over the LIN bus?
Yes, the UJA1069TW24/5V0/C supports secure remote flash programming via the LIN bus using a fail-safe Flash mode entry sequence: three consecutive SPI writes to the Mode register with codes 111 → 001 → 111 within valid watchdog windows. This triggers a controlled transition through Start-up mode into Flash mode, enabling in-system firmware updates while preserving diagnostic logging, reset source tracking, and fail-safe supervision throughout the process.
UJA1069TW24/5V0/C: Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- -
- Interface:
- LIN (Local Interconnect Network)
- Voltage - Supply:
- 5V
- Supplier Device Package:
- 24-HTSSOP
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
UJA1069TW24/5V0/C: FAQ
1.How can I place an order for UJA1069TW24/5V0/C: through Aetrix?
Please submit a Request for Quotation (RFQ) for UJA1069TW24/5V0/C: on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of UJA1069TW24/5V0/C: are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UJA1069TW24/5V0/C: is usually 5 days.
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Once your UJA1069TW24/5V0/C: 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 UJA1069TW24/5V0/C:?
For technical support, including UJA1069TW24/5V0/C: datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UJA1069TW24/5V0/C: requirements.
6.How does Aetrix verify that UJA1069TW24/5V0/C: is sourced from the original manufacturer or authorized distributors?
All UJA1069TW24/5V0/C: 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 UJA1069TW24/5V0/C: meets industry standards.
7.What is the process for return or replacement of UJA1069TW24/5V0/C:?
All UJA1069TW24/5V0/C: units undergo pre-shipment inspection (PSI). If there is an issue with UJA1069TW24/5V0/C:, 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 UJA1069TW24/5V0/C: part is unused and in its original packaging.
Return procedure for UJA1069TW24/5V0/C::
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UJA1069TW24/5V0/C: Tags
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