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NXP Semiconductors UJA1069TW24/5V0/C,

Name: UJA1069TW24/5V0/C,
Brand: NXP Semiconductors
SKU: UJA1069TW24/5V0/C,
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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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

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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 with on-chip oscillator, SPI interface, and INH/LIMP output - designed for automotive ECUs in 14 V and 42 V architectures.

For engineers reviewing the UJA1069TW24/5V0/C datasheet, UJA1069TW24/5V0/C pinout, UJA1069TW24/5V0/C application, or UJA1069TW24/5V0/C equivalent, this page delivers verified technical context, exact pin functions, fail-safe operating mode behavior, LIN bus protection specs, and validated alternative SBCs for automotive power management and networked sensor control.

Technical Context

The UJA1069TW24/5V0/C implements a state-machine-based fail-safe system controller supervised by an on-chip oscillator-clocked watchdog, supporting seven distinct operating modes: Start-up, Restart, Normal, Standby, Sleep, Flash, and Fail-safe - each with defined V1 regulation, RSTN/EN signaling, and LIN activation logic. It enforces strict reset supervision via clamping detection on RSTN and supply undervoltage monitoring.

Its LIN transceiver complies with LIN 2.0 and SAE J2602, offers ±60 V short-circuit proofing on LIN pin, and supports remote flash programming; the SPI interface uses fail-safe coded 16-bit messaging with access-protected 23-bit RAM for diagnostics logging, and the watchdog supports programmable window, time-out, and OFF modes synchronized to microcontroller current thresholds.

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 new automotive sub-bus networks.
V1 Output	5.0 V regulated output at up to 150 mA - powers microcontroller core logic with undervoltage detection and clamping fault reporting.
Watchdog Modes	Programmable Window (Normal mode), Time-out (Standby/Sleep/Flash), and OFF (current-threshold gated) - enables cyclic wake-up, strict software timing enforcement, and fail-safe shutdown.
ESD Protection	±8 kV HBM and ±4 kV IEC 61000-4-2 on off-board pins - meets automotive EMC requirements for robust operation in harsh environments.
LIN Bus Robustness	±60 V short-circuit proof LIN pin; BAT14/BAT42 pins protected per ISO 7637-3 - prevents damage from load dump, reverse battery, and inductive switching transients.
Operating Voltage	Supports 14 V single-supply and 14 V/42 V dual-supply architectures - enables use in conventional 12 V systems and 42 V high-power vehicle subsystems.
SPI Interface	Fail-safe coded 16-bit full-duplex SPI with interrupt-driven status reporting - allows atomic diagnostics readout without multi-frame assembly.

Pinout & Package

UJA1069TW24/5V0/C is housed in a plastic thermal enhanced thin shrink small outline package (HTSSOP24) with 24 leads, 0.65 mm pitch, 4.4 mm body width, and exposed die pad for improved thermal dissipation and EMC performance.

Pin/Terminal	Circuit Role	Design Meaning
n.c.	Not connected	Pin 1 - unused; must be left floating or grounded per layout guidelines.
BAT42	42 V battery supply input	Pin 2 - connects to 42 V rail; tied to BAT14 in 14 V-only applications.
TXDL	LIN transmit data input	Pin 3 - dominant-low/recessive-high logic input driving LIN transceiver output stage.
SENSE	Battery interrupt / chatter detector	Pin 4 - fast edge-sensitive input for detecting battery supply instability or contact bounce.
V1	5.0 V microcontroller regulator output	Pin 5 - supplies MCU core; monitored for undervoltage and clamping events triggering RSTN.
V3	Unregulated 42 V output	Pin 6 - BAT42-related output for external loads; supports continuous or cyclic mode synchronized to WAKE.
RXDL	LIN receive data output	Pin 7 - dominant-low/recessive-high logic output from LIN receiver; fed to MCU GPIO or UART.
SYSINH	System inhibit output	Pin 8 - BAT42-related open-drain or push-pull signal for controlling external DC-DC converters.
RSTN	Reset output / bidirectional input	Pin 9 - active-Low reset to MCU; detects external clamping (HIGH/LOW) and releases after tRSTNL delay.
INTN	Interrupt output	Pin 10 - active-Low open-drain interrupt to MCU; wire-AND capable for multi-interrupt aggregation.
EN	Enable output	Pin 11 - active-High push-pull enable signal; driven LOW during reset/watchdog overflow.
SDI	SPI data input	Pin 12 - serial data input to SBC; sampled on SCK falling edge in full-duplex mode.
SDO	SPI data output	Pin 13 - serial data output from SBC; high-impedance when SCS is HIGH.
SCK	SPI clock input	Pin 14 - master-generated clock; defines SPI timing; used for watchdog service and register access.
SCS	SPI chip select input	Pin 15 - active-Low signal enabling SPI communication; required before SDI/SDO transactions.
TEST	Test pin	Pin 16 - must be connected to GND in production; used for factory test and calibration.
INH/LIMP	Inhibit / limp-home output	Pin 17 - BAT14-related push-pull output; floats by default; drives warning lights or safety relays in Fail-safe mode.
WAKE	Local wake-up input	Pin 18 - BAT42-related input; supports continuous or cyclic sampling to initiate wake-up from Standby/Sleep.
GND	Ground reference	Pin 19 - primary ground return; exposed die pad must be connected to PCB ground plane for optimal EMC/thermal performance.
LIN	LIN bus line	Pin 20 - bidirectional LIN physical layer connection; dominant-low during transmission; includes short-circuit protection.
RTLIN	LIN termination resistor connection	Pin 21 - connects external 1 kΩ pull-up resistor to V1; sets LIN bus bias and termination impedance.
BAT14	14 V battery supply input	Pin 22 - primary 14 V supply input; protected per ISO 7637-3; powers internal regulators and logic.
SENSE	Fast battery interrupt input	Pin 23 - duplicate SENSE function (same as Pin 4); provided for layout flexibility in HTSSOP24 variant.
BAT42	42 V battery supply input	Pin 24 - secondary high-voltage supply input; used only in dual-supply configurations.

Key Features

Feature	Design Value
Fail-safe coded SPI interface	16-bit message framing with embedded error detection - eliminates need for multi-SPI frame assembly to retrieve full status reports.
Programmable watchdog window	10 selectable periods with 4× prescaler; 50–100 % trigger window - enforces both minimum and maximum MCU instruction execution timing.
Autonomous system start-up	Defined sequence across Start-up → Restart → Normal modes with reset source identification - enables differentiated firmware initialization based on fault origin.
23-bit access-protected RAM	Dedicated non-volatile storage for cyclic diagnostic logging - retains failure signatures across resets for root-cause analysis without external memory.
LIN bus short-circuit resilience	±60 V tolerance on LIN pin with automatic fault reporting via SPI - sustains operation during wiring faults and prevents latch-up in ECU harnesses.
Cyclic wake-up capability	Hardware-supported wake-up from Standby/Sleep using watchdog timeout or LIN/WAKE activity - reduces reliance on external timers or MCU RTC.

Applications

Body Control Module (BCM)	Seat Control Unit
Use Scenario: Centralized control of door locks, windows, mirrors, and interior lighting via LIN sub-network. IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C serves as fail-safe power manager and LIN interface, regulating MCU V1, supervising startup, and handling LIN frame transmission/reception. Use Value: Enables safe, low-power sleep/wake cycles with guaranteed reset integrity and LIN bus fault containment - critical for meeting OEM sleep current targets (<100 µA).	Use Scenario: Motorized seat position adjustment with position feedback, heating, and memory recall. IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C provides 5 V MCU supply, local wake-up via seat switch inputs, and LIN communication to body domain controller. Use Value: Integrates watchdog supervision and limp-home output to activate seat movement restriction or warning indicators upon detected failure - satisfies ASIL-B functional safety requirements.
Roof Module (Sunroof/Climate)	Trunk/Liftgate Actuator
Use Scenario: Sunroof open/close control with pinch detection and climate-linked venting logic. IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C manages MCU power, monitors BAT14/BAT42 rails, and handles LIN commands while providing INH/LIMP output for motor driver enable/disable. Use Value: Delivers precise V1 regulation and real-time overtemperature/undervoltage alerts - prevents unintended actuation during voltage sags or thermal overload.	Use Scenario: Power-operated liftgate with obstacle detection, soft-close, and anti-trap logic. IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C acts as LIN gateway and safety supervisor, using SENSE pin for battery chatter detection and RSTN clamping to halt MCU during fault escalation. Use Value: Supports remote flash programming via LIN bus and stores cyclic fault logs in protected RAM - simplifies field updates and warranty diagnostics without disassembly.

Body Control Module (BCM)

Seat Control Unit

Use Scenario: Centralized control of door locks, windows, mirrors, and interior lighting via LIN sub-network.

IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C serves as fail-safe power manager and LIN interface, regulating MCU V1, supervising startup, and handling LIN frame transmission/reception.

Use Value: Enables safe, low-power sleep/wake cycles with guaranteed reset integrity and LIN bus fault containment - critical for meeting OEM sleep current targets (<100 µA).

Use Scenario: Motorized seat position adjustment with position feedback, heating, and memory recall.

IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C provides 5 V MCU supply, local wake-up via seat switch inputs, and LIN communication to body domain controller.

Use Value: Integrates watchdog supervision and limp-home output to activate seat movement restriction or warning indicators upon detected failure - satisfies ASIL-B functional safety requirements.

Roof Module (Sunroof/Climate)

Trunk/Liftgate Actuator

Use Scenario: Sunroof open/close control with pinch detection and climate-linked venting logic.

IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C manages MCU power, monitors BAT14/BAT42 rails, and handles LIN commands while providing INH/LIMP output for motor driver enable/disable.

Use Value: Delivers precise V1 regulation and real-time overtemperature/undervoltage alerts - prevents unintended actuation during voltage sags or thermal overload.

Use Scenario: Power-operated liftgate with obstacle detection, soft-close, and anti-trap logic.

IC Role / Device Role / Timing Role: UJA1069TW24/5V0/C acts as LIN gateway and safety supervisor, using SENSE pin for battery chatter detection and RSTN clamping to halt MCU during fault escalation.

Use Value: Supports remote flash programming via LIN bus and stores cyclic fault logs in protected RAM - simplifies field updates and warranty diagnostics without disassembly.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LIN-based automotive SBC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
UJA1075TW/5V0/C	HTSSOP32 package; adds CAN FD interface and higher V3 drive capability (500 mA vs. 250 mA); same LIN/SPI/watchdog architecture.	Required where CAN FD backbone integration or higher external load drive is needed - not drop-in due to pin count and footprint change.	Select UJA1075TW/5V0/C when expanding beyond LIN-only networks or driving larger solenoids/relays directly.
TLE9471-3ES	Infineon device; 3-channel high-side switch + LIN transceiver + 5 V LDO; no integrated watchdog oscillator or fail-safe state machine.	Used in simpler LIN nodes without autonomous fail-safe recovery; lacks cyclic wake-up, protected RAM, and multi-mode supervision.	Choose TLE9471-3ES for cost-sensitive, non-safety-critical LIN peripherals where full UJA1069TW24/5V0/C fail-safe features are unnecessary.

Compared with UJA1075TW/5V0/C, the UJA1069TW24/5V0/C offers identical fail-safe supervision in a smaller 24-pin footprint but omits CAN FD; versus TLE9471-3ES, it delivers deeper system-level autonomy - including watchdog-coded SPI, 23-bit diagnostic RAM, and seven-state fail-safe mode management - essential for ASIL-B-compliant ECUs.

Availability

UJA1069TW24/5V0/C is available at Aetrix Electronics and suitable for automotive body electronics, seat control units, roof modules, and trunk/liftgate actuators requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified reliability.

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 mixed-signal ICs and functional safety design.

The UJA1069TW24/5V0/C belongs to NXP's System Basis Chip product line, engineered specifically for fail-safe power management and LIN networking in automotive electronic control units - emphasizing autonomous fault detection, low-power operation, and ASIL-B-aligned supervision.

FAQ

What LIN protocol versions does the UJA1069TW24/5V0/C support?

The UJA1069TW24/5V0/C supports LIN 2.0 and SAE J2602 compliance, with full backward compatibility to LIN 1.3 and pin-compatible interoperability with the TJA1020 transceiver. Its LIN transceiver includes enhanced error signaling and reporting, and the LIN bus pin is short-circuit proof up to ±60 V - ensuring robust operation across generations of automotive sub-bus implementations.

How does the UJA1069TW24/5V0/C implement fail-safe behavior during power faults?

The UJA1069TW24/5V0/C implements fail-safe behavior through autonomous voltage monitoring (BAT14, BAT42, V1), on-chip oscillator supervision, and multi-level reset sequencing. Upon V1 undervoltage detection or RSTN clamping, it forces a controlled entry into Fail-safe mode - disabling V1, floating INH/LIMP, and asserting RSTN/EN LOW - while retaining diagnostic RAM contents for post-fault analysis. This behavior is fully hardware-enforced and requires no MCU intervention.

Can the UJA1069TW24/5V0/C support remote firmware updates over LIN?

Yes, the UJA1069TW24/5V0/C supports remote flash programming via the LIN bus. It includes a dedicated Flash mode entered through a fail-safe three-step SPI sequence (111/001/111), which triggers a hardware reset and enables secure bootloader access. The SPI interface uses fail-safe coded messaging and protected RAM to log update progress and errors - making UJA1069TW24/5V0/C suitable for OTA-capable automotive ECUs.

What are the key differences between Standby and Sleep modes in the UJA1069TW24/5V0/C?

In Standby mode, the UJA1069TW24/5V0/C keeps V1 active and the watchdog running in Time-out mode (or OFF, if MCU current drops below IthL(V1)), allowing periodic wake-up without resetting the MCU. In Sleep mode, V1 is disabled, RSTN is forced LOW, and INH/LIMP floats - achieving minimum system power consumption. Wake-up from Sleep requires either LIN activity, WAKE pin edge, or V3 overload, followed by full Start-up mode reinitialization.

Does the UJA1069TW24/5V0/C include integrated memory for diagnostic logging?

Yes, the UJA1069TW24/5V0/C includes 23 bits of access-protected RAM dedicated to diagnostic logging. This memory retains cyclic fault records - such as oscillator failures, LIN bus shorts, SPI errors, or overtemperature warnings - across resets and power cycles. It is readable via a single SPI message, eliminating multi-frame assembly, and supports root-cause analysis without external non-volatile storage.

UJA1069TW24/5V0/C, Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: 24-TSSOP (0.173", 4.40mm Width) Exposed Pad

Packaging:: Tube

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.

2.Are the price and stock information for UJA1069TW24/5V0/C, reliable?

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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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UJA1069TW24/5V0/C, transactions.

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4.How is shipping managed for UJA1069TW24/5V0/C,?

UJA1069TW24/5V0/C, orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

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.

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