My Inquiry
My Account
NXP Semiconductors UJA1079TW/3V3,112
- Part No.:
- UJA1079TW/3V3,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 32-TSSOP (0.240", 6.10mm Width) Exposed Pad
- Datasheet:
-
UJA1079TW/3V3,112.pdf
- Description:
- IC INTFACE SPECIALIZED 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,477
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UJA1079TW/3V3,112 from NXP Semiconductors is a LIN 2.1–compliant System Basis Chip (SBC) integrating a 3.3 V/250 mA voltage regulator, LIN transceiver, SPI interface, dual local wake-up inputs, limp home output, and advanced watchdog-designed for automotive ECU power management and communication control in body electronics modules.
For engineers reviewing the UJA1079TW/3V3,112 datasheet, UJA1079TW/3V3,112 pinout, UJA1079TW/3V3,112 application, or UJA1079TW/3V3,112 equivalent, this page delivers verified functional architecture, thermal-safe HTSSOP32 packaging, LIN bus fault tolerance (±58 V), ISO 7637-3 transient protection, and precise 3.3 V ±2 % regulation for LIN master operation.
Technical Context
The UJA1079TW/3V3,112 implements a state-machine-based system controller managing Off/Standby/Normal/Sleep/Overtemp modes with deterministic transitions triggered by VBAT thresholds, LIN activity, local wake events, or temperature. Its LIN transceiver supports low-slope mode (10.4 kbit/s) for EMC optimization and includes integrated termination diode at DLIN.
Power management features include V1 undervoltage detection at 90 % or 70 % of nominal output, programmable external PNP transistor activation (Ith(act) = 50 mA or 85 mA), and WBIAS-controlled wake sampling (16 ms or 64 ms). The on-chip oscillator independently clocks the watchdog, decoupling timing from V1 stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LIN Compliance | LIN 2.1, SAE J2602, backward-compatible with LIN 2.0 and LIN 1.3 - ensures interoperability with legacy and modern LIN networks. |
| V1 Output Voltage | 3.3 V ±2 % (LIN master), ±3 % (LIN slave) - meets tight regulation requirements for microcontroller clock stability and ADC reference accuracy. |
| Regulator Current | 250 mA continuous; extendable via external PNP transistor - enables scalable power delivery while distributing thermal load across PCB. |
| Watchdog Modes | Window, Timeout, and Off - provides fail-safe timing supervision with configurable period (8 ms to 4096 ms) and independent oscillator source. |
| ESD Protection | ±8 kV HBM on LIN/WAKE pins; ±6 kV IEC 61000-4-2 - satisfies automotive EMC robustness requirements for in-vehicle deployment. |
| Short-Circuit Tolerance | ±58 V on LIN bus pin - withstands load-dump and jump-start transients without latch-up or damage. |
| Package | HTSSOP32 (SOT549-1), 6.1 mm × 11 mm, 0.65 mm pitch, exposed die pad - enables high-power dissipation in compact automotive PCB layouts. |
Pinout & Package
HTSSOP32 package with exposed die pad (thermally enhanced, electrically isolated); 32-pin lead frame with 0.65 mm pitch and 6.1 mm body width. Exposed pad improves thermal resistance and may be connected to GND or left floating per layout requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1 (Pin 4) | Regulated output | 3.3 V supply rail for microcontroller and peripherals; monitored for undervoltage warning/reset at 90 % or 70 % threshold. |
| LIN (Pin 25) | LIN bus interface | High-voltage bidirectional bus line with ±58 V short-circuit protection and ISO 7637-3 transient immunity. |
| WAKE1 / WAKE2 (Pins 18, 19) | Local wake inputs | Digital wake sources with configurable sampling (16/64 ms) and edge-triggered interrupt generation. |
| RSTN (Pin 6) | Bidirectional reset | Drives LOW during internal resets (V1 UV, watchdog, overtemp); accepts external LOW pulse for forced system reset. |
| LIMP (Pin 17) | Limp home output | Fail-safe open-drain output driven LOW during Overtemp or critical fault to activate backup hardware. |
| SDI/SDO/SCK/SCSN (Pins 9–12) | SPI interface | Full-duplex 16-bit SPI with register-mapped configuration, status reporting, and read-only access option. |
| WDOFF (Pin 16) | Watchdog disable | Hardware override: HIGH disables watchdog regardless of register settings - enables safe debug or maintenance mode. |
| DLIN (Pin 26) | LIN termination | Connection point for external 1 kΩ LIN bus termination resistor; integrates diode for bus-level clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced low-power concept | Standby current < 100 µA and Sleep current < 20 µA with full wake capability - extends battery life in always-on vehicle subsystems. |
| Safe system start-up behavior | Deterministic power-on reset sequence with configurable pulse width (short/long) and VBAT threshold detection (Vth(det)pon) - prevents microcontroller lockup during cranking. |
| Detailed status reporting | Register-mapped diagnostics including V1S, WLS1/WLS2, INT_STATUS bits - enables real-time health monitoring without additional sensors. |
| Thermal-safe regulator extension | Configurable external PNP activation threshold (50/85 mA) and dedicated VEXCTRL/VEXCC pins - allows PCB-level thermal load sharing and avoids localized hot spots. |
| Fail-safe outputs | EN (global enable) and LIMP (limp home) pins with defined states in all fault conditions - supports ASIL-B–aligned safety mechanisms. |
Applications
| Body Control Module (BCM) | Seat Control Unit |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, mirrors, and interior lighting in passenger vehicles. IC Role / Device Role / Timing Role: UJA1079TW/3V3,112 serves as primary power manager and LIN interface hub, regulating MCU supply and relaying commands between LIN slaves and host controller. Use Value: Integrates discrete regulator, transceiver, and watchdog into single HTSSOP32 package - reduces BOM count by ≥7 components and PCB area by >35 % versus discrete solution. | Use Scenario: Motorized seat position memory, heating, and lumbar adjustment with LIN-connected sensors and actuators. IC Role / Device Role / Timing Role: UJA1079TW/3V3,112 provides regulated 3.3 V power, LIN physical layer, and wake-up detection for low-duty-cycle operation during vehicle sleep. Use Value: Enables <20 µA Sleep mode current with full wake capability - meets OEM requirements for <100 µA total module quiescent current. |
| Roof Module (Sunroof/Blind Control) | Trunk/Liftgate Actuation |
Use Scenario: LIN-networked sunroof motor, rain sensor, and anti-pinch logic in roof console assemblies. IC Role / Device Role / Timing Role: UJA1079TW/3V3,112 manages power sequencing, monitors LIN bus for command frames, and asserts LIMP output if motor driver overheats or stalls. Use Value: Integrated overtemperature shutdown and limp home output eliminate need for external thermal cutoff and relay - simplifies safety certification. | Use Scenario: Power-operated liftgate with obstacle detection, position feedback, and auto-close functionality. IC Role / Device Role / Timing Role: UJA1079TW/3V3,112 supplies MCU and Hall-effect sensors, detects local wake from handle switch, and triggers cyclic wake for periodic self-test. Use Value: Dual wake inputs (WAKE1/WAKE2) and configurable WBIAS biasing support mechanical switch debouncing and low-leakage design - eliminates external RC networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LIN SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UJA1076TW/3V3,112 | No integrated watchdog; lacks WDOFF pin and WD_and_Status register - reduced functional safety coverage. | Suitable only for non-safety-critical LIN nodes where watchdog supervision is handled externally. | Select when cost sensitivity outweighs need for on-chip timing supervision and ASIL-B support. |
| TLE9183QKXUMA1 | Includes CAN FD interface alongside LIN; higher V1 current (350 mA); different pinout and SPI register map - not pin-compatible. | Targeted at mixed-bus ECUs requiring both LIN and CAN FD connectivity in same housing. | Choose when multi-protocol support and higher current drive justify redesign and qualification effort. |
Compared with UJA1079TW/3V3,112, UJA1076TW/3V3,112 omits watchdog functionality and failsafe diagnostics, while TLE9183QKXUMA1 adds CAN FD but requires new layout and firmware adaptation - making UJA1079TW/3V3,112 optimal for dedicated, cost-sensitive LIN-only body electronics with embedded safety requirements.
Availability
UJA1079TW/3V3,112 is available at Aetrix Electronics and suitable for body control modules, seat control units, and roof modules requiring stable component supply, automotive-grade reliability, and long-term lifecycle support.
Supply support for UJA1079TW/3V3,112 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.
The UJA1079TW/3V3,112 belongs to NXP's System Basis Chip family, engineered specifically for LIN-based automotive ECUs to consolidate power, communication, and safety functions into a single AEC-Q100 qualified device.
FAQ
What LIN protocol versions does the UJA1079TW/3V3,112 support?
The UJA1079TW/3V3,112 supports LIN 2.1 and SAE J2602, and is backward-compatible with LIN 2.0 and LIN 1.3. It implements low-slope mode for optimized EMC performance and includes an integrated termination diode at DLIN - ensuring reliable bus communication across all supported versions without external components.
Does the UJA1079TW/3V3,112 include a watchdog timer?
Yes, the UJA1079TW/3V3,112 includes an advanced independent watchdog with Window, Timeout, and Off modes, clocked by an on-chip oscillator. The watchdog period is programmable from 8 ms to 4096 ms via the NWP bits in the WD_and_Status register, and can be disabled via the WDOFF pin or WMC bit - confirmed in the official NXP datasheet Rev. 02.
What is the output voltage accuracy of the UJA1079TW/3V3,112's V1 regulator?
The UJA1079TW/3V3,112's V1 regulator delivers 3.3 V with ±2 % accuracy for LIN master applications and ±3 % for LIN slave applications. This precision ensures stable microcontroller operation and accurate analog peripheral referencing under varying load and temperature conditions.
How does the UJA1079TW/3V3,112 handle thermal protection?
The UJA1079TW/3V3,112 features overtemperature shutdown that activates when chip temperature exceeds Tth(act)otp, forcing entry into Overtemp mode: V1 is disabled, LIN bus goes high-impedance, RSTN is driven LOW, and LIMP is asserted LOW. Recovery occurs only after temperature drops below Tth(rel)otp - a hysteresis-protected mechanism confirmed in Section 6.1.6.
Can the UJA1079TW/3V3,112 operate during engine cranking?
Yes, the UJA1079TW/3V3,112 operates down to VBAT = 4.5 V, complying with ISO 7637 pulse 4/4b and ISO 16750-2 cranking profiles. Its V1 regulator maintains stable 3.3 V output and undervoltage detection remains active - enabling uninterrupted ECU operation during cold-start voltage sag.
UJA1079TW/3V3,112 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:
- -
- Interface:
- SPI Serial
- Voltage - Supply:
- 4.5V ~ 28V
- Supplier Device Package:
- 32-HTSSOP
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
UJA1079TW/3V3,112 FAQ
1.How can I place an order for UJA1079TW/3V3,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for UJA1079TW/3V3,112 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 UJA1079TW/3V3,112 reliable?
The price and inventory of UJA1079TW/3V3,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UJA1079TW/3V3,112 is usually 5 days.
3.What payment methods are accepted for UJA1079TW/3V3,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UJA1079TW/3V3,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UJA1079TW/3V3,112?
UJA1079TW/3V3,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UJA1079TW/3V3,112 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 UJA1079TW/3V3,112?
For technical support, including UJA1079TW/3V3,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UJA1079TW/3V3,112 requirements.
6.How does Aetrix verify that UJA1079TW/3V3,112 is sourced from the original manufacturer or authorized distributors?
All UJA1079TW/3V3,112 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 UJA1079TW/3V3,112 meets industry standards.
7.What is the process for return or replacement of UJA1079TW/3V3,112?
All UJA1079TW/3V3,112 units undergo pre-shipment inspection (PSI). If there is an issue with UJA1079TW/3V3,112, 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 UJA1079TW/3V3,112 part is unused and in its original packaging.
Return procedure for UJA1079TW/3V3,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UJA1079TW/3V3,112 Tags
-
NVT4857UKAZ
NXP Semiconductors
-
TCA8418RTWR
Texas Instruments
-
PCA9546APWR
Texas Instruments
-
MD0100N8-G
Microchip Technology
-
PCA9548APW,118
NXP Semiconductors
-
PCA9540BDP,118
NXP Semiconductors
-
PCA9548APWR
Texas Instruments
-
PCA9546APW,118
NXP Semiconductors
-
PTN3360DBS,518
NXP Semiconductors
-
PCA9546ABS,118
NXP Semiconductors
-
PCA9518PWR
Texas Instruments
-
PCA9545APW,118
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
