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NXP Semiconductors UJA1131AHW/3/0Y
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UJA1131AHW/3/0Y.pdf
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Product details
Overview
UJA1131AHW/3/0Y from NXP Semiconductors is a buck/boost System Basis Chip (SBC) for automotive ECUs, integrating a 3.3 V/500 mA LDO (V1), ISO 11898-2-compliant HS-CAN transceiver supporting up to 2 Mbit/s CAN FD data fields, single LIN 2.x transceiver, and a switched-mode power supply with automatic buck/boost operation down to 2 V battery input. It delivers fail-safe microcontroller supply, battery monitoring, watchdog, and limp-home outputs in a compact HTQFP48 package.
For engineers reviewing the UJA1131AHW/3/0Y datasheet, UJA1131AHW/3/0Y pinout, UJA1131AHW/3/0Y application, or UJA1131AHW/3/0Y equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade specifications including CAN FD timing compliance, SMPS boost capability at 2 V, and real-world ECU power management use cases - all extracted from NXP's official UJA113x product data sheet Rev. 2 (2016).
Technical Context
The UJA1131AHW/3/0Y implements a dual-mode SMPS that automatically selects buck or boost based on BAT voltage and load, enabling uninterrupted 3.3 V/500 mA microcontroller supply during battery dips as low as 2 V. Its CAN transceiver complies fully with ISO 11898-2:201x and supports CAN FD fast-phase communication up to 2 Mbit/s with loop-delay symmetry optimized for error-free operation.
This variant features one LIN transceiver (LIN 2.x/SAE J2602 compliant), no partial networking (CAN FD-passive disabled), and four HVIOs configurable as high-side/low-side drivers or wake-up inputs - all controlled via 16-/24-/32-bit SPI interface with interrupt reporting and non-volatile configuration storage for power-on and limp-home behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V1 Output | 3.3 V ±2 %, 500 mA - powers microcontroller with transient load support and undervoltage reset at selectable thresholds (60–90 % of nominal) |
| SMPS Mode | Automatic buck/boost with single external coil - sustains V1 operation down to 2 V battery input without external semiconductors |
| CAN Data Rate | Up to 2 Mbit/s in CAN FD data field - meets ISO 11898-2:201x timing symmetry requirements for reliable fast-phase communication |
| LIN Compliance | LIN 2.x and SAE J2602 - includes integrated slave termination and optimized EMC emission curve shaping |
| HVIO Count | 4 pins (HVIO1–HVIO4) - individually configurable as HS/LS drivers or wake-up inputs with open-load/short-circuit diagnostics |
| Package | HTQFP48 (10 mm × 10 mm, exposed die pad) - low thermal resistance for automotive under-hood environments |
| Operating Temp | −40 °C to +150 °C - qualified per AEC-Q100 Grade 0 for engine compartment deployment |
Pinout & Package
UJA1131AHW/3/0Y uses the HTQFP48 package (SOT1181-2) with 10 mm × 10 mm body, 1.0 mm height, and thermally enhanced exposed die pad internally connected to GND (pins 4 and 23). The pad must be soldered to PCB ground for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1 (Pin 6) | Main microcontroller supply output | 3.3 V regulated output with 500 mA capability, undervoltage reset, and reverse-current clamp limiting voltage to ≤6 V |
| RXDC / TXDC (Pins 18–19) | CAN physical layer interface | Differential receive/transmit data lines for ISO 11898-2-compliant HS-CAN bus connection |
| CANH / CANL (Pins 21–22) | CAN bus line terminals | Direct connection to vehicle CAN bus; floating when BAT is off; ±40 V short-circuit proof |
| RXDL1 / TXDL1 (Pins 16–17) | LIN 1 transceiver interface | Single-channel LIN 2.x physical layer I/O; compliant with SAE J2602 and backward-compatible with LIN 1.3 |
| HVIO1–HVIO4 (Pins 34–37) | High-voltage I/O bank 0 | Configurable as HS/LS drivers or wake-up inputs; supports limp-home signals (HVIO2 static, HVIO3 100 Hz, HVIO4 1.25 Hz) |
| LIMP (Pin 39) | Limp-home activation output | Active-low signal to trigger hardware-level fail-safe response during critical system malfunction |
| BAT (Pin 26) | Battery supply input | Primary power source for LIN transceiver and battery A/D converter channel 0; protected per ISO 7637-3 |
| INTN1 / INTN2 (Pins 11, 13) | Interrupt outputs | INTN1 reports all interrupts; INTN2 reports only high-priority events (e.g., V1 undervoltage, CAN/LIN wake-up) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated buck/boost SMPS | Single-coil architecture enables continuous 3.3 V microcontroller supply during battery dips to 2 V - eliminates need for external boost ICs in start-stop systems |
| ISO 11898-2:201x CAN transceiver | Guaranteed loop-delay symmetry supports error-free 2 Mbit/s CAN FD fast-phase operation - critical for ADAS and gateway ECU timing integrity |
| Non-volatile configuration memory | Stores power-on behavior, limp-home settings, and sleep mode enable/disable state - allows field-programmable adaptation without hardware change |
| Four diagnostic HVIOs | Each supports open-load detection, short-circuit protection, and ratiometric wake-up threshold - enables robust sensor actuation and fault-aware wake-up in body control modules |
| Automotive-grade protection | ±6 kV HBM ESD on CAN/LIN pins, ±40 V short-circuit proof bus pins, and ISO 7637-3 transient immunity - meets OEM requirements for under-hood reliability |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) |
|---|---|
|
Use Scenario: Centralized power management and communication for door locks, lighting, and climate actuators in modern vehicles. IC Role / Device Role / Timing Role: UJA1131AHW/3/0Y serves as primary SBC supplying MCU, managing CAN/LIN gateways, and executing limp-home signaling during power faults. Use Value: Integrated 3.3 V/500 mA regulator and 2 V boost capability ensure uninterrupted BCM operation during cranking; HVIO diagnostics reduce wiring complexity. |
Use Scenario: Powering and interfacing safety-critical engine controllers in gasoline/diesel powertrains with strict ASIL-B requirements. IC Role / Device Role / Timing Role: UJA1131AHW/3/0Y provides fail-safe MCU supply, CAN FD communication up to 2 Mbit/s, and watchdog-controlled reset sequencing. Use Value: ISO 11898-2:201x timing compliance ensures deterministic CAN FD latency; overtemperature shutdown prevents thermal runaway in high-load conditions. |
| Transmission Control Module (TCM) | Advanced Driver Assistance Systems (ADAS) Gateway |
|
Use Scenario: Managing power, diagnostics, and multi-bus communication between transmission solenoids, sensors, and vehicle network. IC Role / Device Role / Timing Role: UJA1131AHW/3/0Y supplies TCM MCU via V1, monitors battery health via dual-channel A/D, and handles LIN-based sensor interfaces. Use Value: Battery monitoring accuracy (±300 mV at 20 V) enables precise low-voltage detection before gear-shift failure; limp-home outputs activate mechanical failsafes. |
Use Scenario: Aggregating CAN FD, LIN, and sensor data across radar, camera, and ultrasonic subsystems in domain controller architectures. IC Role / Device Role / Timing Role: UJA1131AHW/3/0Y acts as secondary SBC for sub-system power and communication, supporting remote flash programming via CAN bus. Use Value: Remote flash capability enables OTA updates without physical access; 10-bit battery A/D supports predictive maintenance algorithms using voltage trend analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar System Basis Chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UJA1132HW/3V3 | Same HTQFP48 package and 3.3 V/500 mA V1 regulator, but adds high-current boost SMPS capable of sustaining full MCU load at 2 V - higher peak current than UJA1131AHW/3/0Y | Preferred for start-stop ECUs requiring sustained 500 mA during deep battery dips; UJA1131AHW/3/0Y suits lower-power modules where 2 V operation is intermittent | Select UJA1132HW/3V3 if continuous 500 mA boost capability is required; UJA1131AHW/3/0Y remains optimal for cost-sensitive, moderate-dip applications |
| TLE9471-3ES | Infineon SBC with 3.3 V/500 mA LDO, ISO 11898-2 CAN, single LIN, and buck-only SMPS (no boost) - lacks 2 V battery operation and CAN FD fast-phase timing compliance | Suitable for non-start-stop applications with stable battery supply; cannot replace UJA1131AHW/3/0Y in cranking-tolerant designs or CAN FD fast-phase networks | Choose TLE9471-3ES only when boost functionality and 2 Mbit/s CAN FD timing are not required; verify CAN FD data-field compatibility before substitution |
Compared with UJA1132HW/3V3, the UJA1131AHW/3/0Y offers identical core functionality but reduced boost current capability - making it suitable for lower-power ECUs where full 500 mA sustainment at 2 V is unnecessary. Against TLE9471-3ES, UJA1131AHW/3/0Y provides unique 2 V battery operation and guaranteed CAN FD fast-phase timing, essential for next-generation automotive networks.
Availability
UJA1131AHW/3/0Y is available at Aetrix Electronics and suitable for Body Control Modules, Engine Control Units, Transmission Control Modules, and ADAS Gateways requiring stable component supply, automotive qualification, and long-term lifecycle support.
Supply support for UJA1131AHW/3/0Y 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 power management and communication ICs.
The UJA113x family was designed specifically for automotive Electronic Control Units requiring integrated power conversion, CAN/LIN interface, and fail-safe system control - targeting cost-optimized, thermally robust ECU designs with minimal external components.
FAQ
What is the minimum battery voltage supported by UJA1131AHW/3/0Y during boost operation?
The UJA1131AHW/3/0Y supports boost-mode operation down to 2 V battery input while maintaining regulated 3.3 V output to the microcontroller. This capability is validated per NXP's UJA113x datasheet Rev. 2 (2016) and enables reliable ECU operation during engine cranking events. The actual lowest sustainable voltage depends on load conditions, but 2 V is the specified functional limit for UJA1131AHW/3/0Y.
Does UJA1131AHW/3/0Y support CAN FD communication at 2 Mbit/s in both arbitration and data phases?
The UJA1131AHW/3/0Y supports CAN FD up to 2 Mbit/s exclusively in the data phase, as confirmed in Section 2.4 of the official datasheet. Its ISO 11898-2:201x-compliant transceiver guarantees loop-delay symmetry for error-free fast-phase operation, but arbitration phase speed remains limited to classical CAN rates (≤1 Mbit/s). UJA1131AHW/3/0Y does not implement CAN FD arbitration phase acceleration.
How many LIN transceivers does UJA1131AHW/3/0Y integrate, and what standards do they meet?
UJA1131AHW/3/0Y integrates one LIN transceiver compliant with LIN 2.x and SAE J2602 standards, with downward compatibility to LIN 1.3. It includes integrated slave termination and optimized EMC emission curve shaping. The second LIN channel (LIN2) is internally connected and unused in this variant, as indicated by "i.c." notation in the pin description table for pins RXDL2 and TXDL2.
Can UJA1131AHW/3/0Y enter Sleep mode with V1 disabled, and how is wake-up triggered?
Yes, UJA1131AHW/3/0Y supports Sleep mode with V1 disabled, reducing quiescent current for ultra-low-power states. Wake-up is triggered exclusively by enabled sources: CAN bus activity, LIN bus activity, or configured HVIO pins (HVIO1–HVIO4). The device exits Sleep mode only upon such an event - no internal timer or periodic wake-up is active unless explicitly enabled via SPI configuration.
What protection features are implemented on the CAN and LIN bus pins of UJA1131AHW/3/0Y?
UJA1131AHW/3/0Y provides ±40 V short-circuit proofing on CANH/CANL and LIN1/LIN2 pins, ±6 kV HBM ESD protection, and ±6 kV IEC 61000-4-2 ESD robustness. All bus pins are protected against transients per ISO 7637-3, and CAN bus connections remain truly floating when BAT power is removed - ensuring safe hot-plug operation and system-level fault isolation.
UJA1131AHW/3/0Y Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
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- Bulk
- Product Status:
- Active
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UJA1131AHW/3/0Y FAQ
1.How can I place an order for UJA1131AHW/3/0Y through Aetrix?
Please submit a Request for Quotation (RFQ) for UJA1131AHW/3/0Y 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 UJA1131AHW/3/0Y reliable?
The price and inventory of UJA1131AHW/3/0Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UJA1131AHW/3/0Y is usually 5 days.
3.What payment methods are accepted for UJA1131AHW/3/0Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UJA1131AHW/3/0Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UJA1131AHW/3/0Y?
UJA1131AHW/3/0Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UJA1131AHW/3/0Y 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 UJA1131AHW/3/0Y?
For technical support, including UJA1131AHW/3/0Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UJA1131AHW/3/0Y requirements.
6.How does Aetrix verify that UJA1131AHW/3/0Y is sourced from the original manufacturer or authorized distributors?
All UJA1131AHW/3/0Y 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 UJA1131AHW/3/0Y meets industry standards.
7.What is the process for return or replacement of UJA1131AHW/3/0Y?
All UJA1131AHW/3/0Y units undergo pre-shipment inspection (PSI). If there is an issue with UJA1131AHW/3/0Y, 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 UJA1131AHW/3/0Y part is unused and in its original packaging.
Return procedure for UJA1131AHW/3/0Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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