My Inquiry
My Account
NXP Semiconductors UJA1078TW/5V0,112
- Part No.:
- UJA1078TW/5V0,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 32-TSSOP (0.240", 6.10mm Width) Exposed Pad
- Datasheet:
-
UJA1078TW/5V0,112.pdf
- Description:
- IC INTFACE SPECIALIZED 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,654
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UJA1078TW/5V0,112 from NXP Semiconductors is a core System Basis Chip (SBC) integrating a high-speed CAN transceiver (ISO 11898-2/5 compliant), two LIN 2.1 transceivers (SAE J2602 compliant), a 5 V/250 mA microcontroller voltage regulator (V1), a dedicated 5 V CAN transceiver regulator (V2), and SPI-based system control - all in a single HTSSOP32 package for automotive ECU power and communication management.
For engineers reviewing the UJA1078TW/5V0,112 datasheet, UJA1078TW/5V0,112 pinout, UJA1078TW/5V0,112 application, or UJA1078TW/5V0,112 equivalent, this page delivers verified functional partitioning, automotive-grade fault diagnostics (overtemperature shutdown, limp home output, undervoltage detection), wake-up source identification (CAN/LIN/local), and regulator thermal management via external PNP transistor support.
Technical Context
The UJA1078TW/5V0,112 implements a state-machine-based system controller managing Off/Standby/Normal/Sleep/Overtemp modes with deterministic transitions triggered by VBAT thresholds, wake events, or temperature faults. Its dual-regulator architecture isolates V1 (microcontroller supply) from V2 (CAN transceiver supply), enabling independent undervoltage monitoring (90 % V1 reset threshold, 90 % V2 warning) and cranking operation down to 4.5 V (V1) and 5.5 V (V2).
SPI communication uses full-duplex mode with register-mapped access (WD_and_Status, Mode_Control, Int_Control) for real-time configuration of watchdog window timing (128 ms default), LIN slope control (10.4/20 kbit/s), wake sampling (16/64 ms), and limp home activation. The CAN transceiver includes SPLIT pin for recessive bus stabilization and floating bus pins in power-off mode per ISO 11898-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CAN Interface | High-speed CAN transceiver compliant with ISO 11898-2 and ISO 11898-5; supports bus wake-up and SPLIT pin for recessive level stabilization. |
| LIN Interfaces | Dual LIN transceivers compliant with LIN 2.1, SAE J2602, and backward-compatible with LIN 2.0/1.3; include low-slope mode and integrated termination diode at DLIN. |
| V1 Regulator | 5 V ±2 % (LIN master) / ±3 % (LIN slave) output delivering up to 250 mA; supports external PNP transistor for thermal load sharing; operates down to 4.5 V VBAT during cranking. |
| V2 Regulator | Dedicated 5 V regulator for internal CAN transceiver; undervoltage warning at 90 % nominal; switchable off; operates down to 5.5 V VBAT during cranking. |
| Watchdog | Programmable watchdog with Window/Timeout/Off modes; clocked by on-chip oscillator; default period 128 ms; WDOFF pin disables watchdog and triggers software reset. |
| SPI Interface | 16-bit full-duplex SPI with SCSN/SCK/SDI/SDO signals; register-addressed access (A2–A0); read-only option preserves register state during status reads. |
| Package | HTSSOP32 (SOT549-1): 6.1 mm × 11 mm body, 0.65 mm pitch, exposed die pad for PCB heat dissipation; RoHS and dark green compliant. |
Pinout & Package
HTSSOP32 package (SOT549-1) with 32 leads, 6.1 mm body width, 0.65 mm lead pitch, and exposed die pad thermally connected to PCB ground or left floating per design requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1 (Pin 4) | Main microcontroller supply output | 5 V regulated output (±2 % accuracy for LIN master); powers MCU and peripherals; supports external PNP transistor via VEXCTRL/VEXCC pins. |
| V2 (Pin 20) | CAN transceiver supply output | Dedicated 5 V regulator for internal CAN PHY; electrically isolated from V1 to prevent noise coupling and enable independent undervoltage monitoring. |
| RSTN (Pin 6) | Bidirectional reset I/O | Drives LOW during power-on, overtemperature, or watchdog overflow; accepts external reset pulse; configurable reset length supports diverse MCU timing requirements. |
| INTN (Pin 7) | Interrupt output | Open-drain signal indicating pending events: V1/V2 undervoltage, CAN/LIN wake-up, cyclic interrupt, or power-on; individually maskable via Int_Control register. |
| LIMP (Pin 17) | Limp home control output | Active-LOW output asserted during overtemperature fault or software-triggered limp home mode; enables fail-safe hardware activation in critical system failures. |
| WAKE1/WAKE2 (Pins 18/19) | Local wake-up inputs | Digital wake sources with programmable sampling (16/64 ms) and edge-triggered interrupt generation; bias controlled via WBIAS (Pin 28) and WSE1/WSE2 bits. |
| SPLIT (Pin 24) | CAN common-mode stabilization | Output referenced to CAN bus midpoint; used with external resistor network to reduce recessive-level ringing and improve EMC performance on high-speed CAN bus. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade EMC robustness | ±8 kV HBM ESD on CAN/LIN/WAKE pins; ±6 kV IEC 61000-4-2; ±58 V short-circuit proof bus pins; ISO 7637-3 transient protection on BAT/CAN/LIN. |
| Controlled system startup | Deterministic Off → Standby → Normal mode sequencing with VBAT threshold detection (Vth(det)pon/poff); safe reset pulse generation and mode transition validation. |
| Multi-source wake-up capability | Simultaneous wake detection from CAN bus activity, LIN bus frames, or local WAKE1/WAKE2 inputs; wake source identification via WLS1/WLS2 status bits. |
| Thermal-aware power management | Overtemperature shutdown with hysteresis; LIMP output assertion; automatic entry into Overtemp mode above Tth(act)otp; recovery only after chip cools below Tth(rel)otp. |
| Flexible regulator extension | V1 current boost via external PNP transistor controlled by VEXCTRL (base drive) and monitored at VEXCC (collector current); programmable activation thresholds (50/85 mA rising, 15/50 mA falling). |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) |
|---|---|
Use Scenario: Centralized vehicle body functions including door locks, lighting, window lifts, and mirror controls managed via LIN sub-buses and coordinated over CAN backbone. IC Role / Device Role / Timing Role: UJA1078TW/5V0,112 serves as primary power and communication hub - supplying 5 V/250 mA to BCM microcontroller, driving dual LIN slaves (e.g., seat module, mirror ECU), and relaying commands via high-speed CAN to gateway. Use Value: Eliminates discrete regulators, CAN/LIN transceivers, and watchdog ICs; reduces BOM count by ≥7 components while maintaining ISO 11898-2/SAE J2602 compliance and cranking resilience. | Use Scenario: Engine management system requiring reliable microcontroller power, CAN diagnostics, and LIN-connected sensors (e.g., throttle position, coolant temp) under harsh thermal and electrical conditions. IC Role / Device Role / Timing Role: UJA1078TW/5V0,112 provides regulated 5 V V1 supply to engine MCU, powers internal CAN transceiver via isolated V2 rail, monitors VBAT during cranking (down to 4.5 V), and asserts LIMP output upon overtemperature fault. Use Value: Enables fail-safe engine operation with limp-home activation, eliminates need for external CAN bus termination resistors (via SPLIT pin), and simplifies layout with integrated wake-up source detection. |
| Advanced Driver Assistance Systems (ADAS) Sensor Hub | Electric Power Steering (EPS) Control Unit |
Use Scenario: Aggregation and preprocessing of data from multiple LIN-connected ADAS sensors (radar, camera, ultrasonic) with CAN-based reporting to central domain controller. IC Role / Device Role / Timing Role: UJA1078TW/5V0,112 acts as sensor interface SBC - powering vision processor via V1, managing two LIN sensor clusters (e.g., front/rear radar), and transmitting fused data over CAN with precise interrupt-driven wake-up handling. Use Value: Supports low-power Standby mode with LIN bus wake-up detection active; reduces quiescent current during vehicle sleep while retaining full diagnostic visibility via SPI registers. | Use Scenario: Real-time torque assist control using motor driver ICs, torque sensor feedback, and CAN-based vehicle speed input - demanding high reliability and thermal resilience. IC Role / Device Role / Timing Role: UJA1078TW/5V0,112 supplies 5 V/250 mA to EPS MCU, isolates CAN transceiver power (V2) from motor switching noise, detects overtemperature via on-die sensor, and activates LIMP output to engage mechanical fallback steering. Use Value: Meets ASIL-B functional safety requirements through deterministic reset behavior, overtemperature shutdown, and independent V1/V2 undervoltage monitoring - without external supervision circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UJA1076TW/5V0,112 | Single-LIN variant (no LIN2 transceiver); identical CAN, V1/V2 regulators, watchdog, and HTSSOP32 package. | Targeted at cost-sensitive ECUs where only one LIN sub-bus is required (e.g., simple lighting control modules). | Select when dual-LIN functionality is unnecessary; retains full pin compatibility and SPI register mapping except LIN2-related bits. |
| TJA1043TK/0Z | Standalone high-speed CAN transceiver (ISO 11898-2/5) with wake-up capability; no LIN, no regulators, no watchdog, no SPI interface. | Used only for CAN physical layer extension where power management and multi-protocol support are handled externally. | Choose only if CAN interface is the sole requirement; requires separate voltage regulation, LIN transceivers, and system supervision ICs. |
Compared with UJA1078TW/5V0,112, UJA1076TW/5V0,112 reduces integration depth by removing LIN2 but maintains full drop-in compatibility for single-LIN designs, whereas TJA1043TK/0Z provides only CAN PHY functionality - necessitating complete redesign of power, supervision, and LIN subsystems.
Availability
UJA1078TW/5V0,112 is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, ADAS sensor hubs, and electric power steering systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for UJA1078TW/5V0,112 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in CAN, LIN, and automotive power management ICs.
The UJA1078TW/5V0,112 belongs to NXP's System Basis Chip product line, designed specifically to consolidate ECU power, communication, and safety functions into a single AEC-Q100 qualified device for next-generation automotive electronics.
FAQ
What is the operating voltage range for the V1 regulator in UJA1078TW/5V0,112?
The V1 regulator in UJA1078TW/5V0,112 operates with input VBAT down to 4.5 V - meeting ISO 7637 pulse 4/4b and ISO 16750-2 cranking requirements - and delivers a stable 5 V ±2 % output for LIN master applications or ±3 % for LIN slave use cases. It supports external PNP transistor current boosting and features undervoltage warning at 90 % nominal and reset at either 90 % or 70 % nominal output voltage.
Does UJA1078TW/5V0,112 support both LIN 2.1 and legacy LIN protocols?
Yes, UJA1078TW/5V0,112 integrates two LIN transceivers fully compliant with LIN 2.1 and SAE J2602, and explicitly supports downward compatibility with LIN 2.0 and LIN 1.3. Each LIN interface includes low-slope mode (10.4 kbit/s) for optimized EMC performance and an integrated termination diode at the DLIN pin to simplify board layout.
How does the watchdog function in UJA1078TW/5V0,112 differ from basic timeout watchdogs?
The UJA1078TW/5V0,112 watchdog offers three distinct modes - Window, Timeout, and Off - with independent clocking from an on-chip oscillator. In Window mode, it enforces strict timing windows (e.g., first half of period) for valid refreshes; violation triggers immediate reset. Default period is 128 ms, programmable from 8 ms to 4096 ms via NWP bits, and deactivation is possible via the WDOFF pin which also initiates software reset.
What is the purpose of the SPLIT pin on UJA1078TW/5V0,112?
The SPLIT pin (Pin 24) on UJA1078TW/5V0,112 provides a stabilized reference voltage for external CAN bus termination networks. When used with two 60 Ω resistors between CANH/CANL and SPLIT, it actively stabilizes the recessive bus level, reducing ringing and improving electromagnetic compatibility - especially critical in high-speed CAN networks operating at 1 Mbit/s with long stubs or noisy environments.
Can UJA1078TW/5V0,112 enter low-power states while maintaining wake-up capability?
Yes, UJA1078TW/5V0,112 supports Standby and Sleep modes with full wake-up retention. In Standby mode, V1 remains active while CAN/LIN transceivers operate in Lowpower mode with bus wake-up detection enabled. In Sleep mode, both V1 and V2 are disabled, but CAN/LIN/local wake-up sources remain active - allowing wake event detection and automatic transition to Standby with system reset, all at ultra-low quiescent current.
UJA1078TW/5V0,112 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:
- CAN, LIN
- Voltage - Supply:
- 4.5V ~ 28V
- Supplier Device Package:
- 32-HTSSOP
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
UJA1078TW/5V0,112 FAQ
1.How can I place an order for UJA1078TW/5V0,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for UJA1078TW/5V0,112 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 UJA1078TW/5V0,112 reliable?
The price and inventory of UJA1078TW/5V0,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UJA1078TW/5V0,112 is usually 5 days.
3.What payment methods are accepted for UJA1078TW/5V0,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UJA1078TW/5V0,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UJA1078TW/5V0,112?
UJA1078TW/5V0,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UJA1078TW/5V0,112 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 UJA1078TW/5V0,112?
For technical support, including UJA1078TW/5V0,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UJA1078TW/5V0,112 requirements.
6.How does Aetrix verify that UJA1078TW/5V0,112 is sourced from the original manufacturer or authorized distributors?
All UJA1078TW/5V0,112 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 UJA1078TW/5V0,112 meets industry standards.
7.What is the process for return or replacement of UJA1078TW/5V0,112?
All UJA1078TW/5V0,112 units undergo pre-shipment inspection (PSI). If there is an issue with UJA1078TW/5V0,112, 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 UJA1078TW/5V0,112 part is unused and in its original packaging.
Return procedure for UJA1078TW/5V0,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UJA1078TW/5V0,112 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…
