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NXP Semiconductors UJA1131AHW/5F0/0Y
- Part No.:
- UJA1131AHW/5F0/0Y
- Manufacturer:
- NXP Semiconductors
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UJA1131AHW/5F0/0Y.pdf
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- UJA1131AHW/5F0/0Y
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Product details
Overview
UJA1131AHW/5F0/0Y from NXP Semiconductors is a buck/boost System Basis Chip (SBC) for automotive ECUs, integrating a 5 V/500 mA LDO regulator, ISO 11898-2-compliant HS-CAN transceiver (up to 2 Mbit/s CAN FD), single LIN transceiver, and battery-supplied high-voltage I/Os. It delivers fail-safe power management with limp-home outputs and operates down to 2 V battery input in boost mode.
For engineers reviewing the UJA1131AHW/5F0/0Y datasheet, UJA1131AHW/5F0/0Y pinout, UJA1131AHW/5F0/0Y application, or UJA1131AHW/5F0/0Y equivalent, this SBC supports critical automotive functions including ECU power sequencing, CAN/LIN bus interfacing, microcontroller supply regulation, and diagnostic wake-up via HVIO or bus lines - all in a compact HTQFP48 package.
Technical Context
The UJA1131AHW/5F0/0Y implements a dual-mode switched-mode power supply (SMPS) that automatically selects buck or boost operation based on input voltage and load, enabling continuous microcontroller supply during battery dips as low as 2 V. Its integrated CAN transceiver complies with ISO 11898-2:201x and supports CAN FD fast-phase data rates up to 2 Mbit/s.
This variant includes one LIN transceiver (LIN 2.x compliant), two-channel battery monitoring with 10-bit A/D converter (±300 mV accuracy at 20 V), and four configurable HVIO pins supporting high-side/low-side drive or wake-up input roles - all managed via SPI interface with non-volatile configuration storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Input Range | 2 V to 40 V battery input; enables operation during cold-crank and load-dump conditions without external protection circuitry. |
| V1 Regulator Output | 5 V ±2 %, 500 mA; powers microcontroller directly with undervoltage reset threshold selectable at 60–90 % of nominal. |
| CAN Data Rate | Up to 2 Mbit/s in CAN FD fast phase; meets ISO 11898-2:201x timing requirements for reliable high-speed communication. |
| LIN Compliance | LIN 2.x and SAE J2602 compliant; includes integrated slave termination and optimized EMC emission shaping. |
| HVIO Count & Function | 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); provides low thermal resistance for automotive under-hood environments. |
| Operating Temperature | −40 °C to +150 °C junction temperature; qualified per AEC-Q100 Grade 0 for engine compartment deployment. |
Pinout & Package
UJA1131AHW/5F0/0Y uses the HTQFP48 package (SOT1181-2) with 10 mm × 10 mm body, 1.0 mm height, and exposed die pad thermally connected to GND. The pinout is validated per NXP's official pin description table for UJA1131HW variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Battery supply input | Main power source for LIN transceiver and A/D converter channel 0; withstands ±40 V transients per ISO 7637-3. |
| V1 | Main regulator output | 5 V ±2 %, 500 mA supply for microcontroller; shuts off in Sleep mode to minimize quiescent current. |
| RSTN | Reset I/O | Bidirectional pin referenced to V1; generates controlled reset pulse on watchdog timeout or V1 undervoltage. |
| TXDC / RXDC | CAN data interface | Differential transmit/receive signals for HS-CAN bus; compliant with ISO 11898-2 physical layer. |
| LIN1 | LIN bus interface | Single-wire LIN 2.x physical layer connection; includes integrated termination and fault protection. |
| HVIO1–HVIO4 | High-voltage I/O | Configurable as HS/LS drivers or wake-up inputs; support limp-home signaling (e.g., HVIO3 = 100 Hz, 10 % duty cycle). |
| LIMP | Limp-home output | Active-low signal activated during system failure; drives external hardware to safe operational state. |
| SCK / SDO / SDI / SCSN | SPI interface | 16-/24-/32-bit serial interface for configuration, status readback, and non-volatile memory programming. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Buck/Boost SMPS | Single-coil architecture with automatic mode selection; maintains V1 regulation during battery dips to 2 V without external FETs. |
| CAN FD Fast-Phase Support | 2 Mbit/s data rate capability with loop-delay symmetry compliance for ISO 11898-2:201x, enabling future-proof CAN FD integration. |
| Configurable Limp-Home Outputs | Three dedicated HVIO pins (HVIO2–HVIO4) generate static, 100 Hz, or 1.25 Hz limp-home signals for fail-safe ECU behavior. |
| Robust HVIO Diagnostics | Per-pin open-load detection, short-circuit protection, and wake-up source reporting via SPI - no external sense resistors required. |
| Low-Power Sleep Mode | Sub-10 µA quiescent current with full wake-up capability via CAN, LIN, or HVIO; Sleep mode disable configurable in NVM. |
Applications
| Engine Control Module (ECM) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time engine parameter monitoring and actuator control under wide battery voltage range (6–16 V), including cold-crank conditions. IC Role / Device Role / Timing Role: Central SBC providing regulated 5 V supply, CAN FD communication, and HVIO-driven injector/valve control with limp-home fallback. Use Value: Maintains microcontroller operation down to 2 V battery input via boost mode, preventing ECU reset during cranking. |
Use Scenario: Power management and LIN-based door/window/mirror control in vehicle body networks with partial networking requirements. IC Role / Device Role / Timing Role: Single-chip power + communication hub managing multiple LIN slaves and local HVIO loads while minimizing standby current. Use Value: Enables ultra-low-power Sleep mode (<10 µA) with selective wake-up via LIN or HVIO, extending battery life in parked state. |
| Advanced Driver Assistance Systems (ADAS) ECU | Transmission Control Unit (TCU) |
Use Scenario: Safety-critical sensor fusion ECU requiring fail-safe power sequencing, CAN FD high-bandwidth data transfer, and diagnostic readiness. IC Role / Device Role / Timing Role: System basis chip delivering ASIL-B capable power management, watchdog supervision, and CAN FD communication with <2 µs loop delay. Use Value: Integrated watchdog with window mode and configurable period (8 ms–4 s) ensures deterministic microcontroller recovery during transient faults. |
Use Scenario: Transmission control under high-temperature, high-vibration conditions with frequent battery voltage fluctuations during gear shifts. IC Role / Device Role / Timing Role: Robust SBC supplying 5 V/500 mA to transmission MCU while monitoring battery health and enabling limp-home gear engagement. Use Value: Dual-channel battery A/D converter (±300 mV accuracy) enables precise undervoltage/overvoltage detection for adaptive shift scheduling. |
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/5V0 | Same buck/boost SMPS, 5 V/500 mA V1, single LIN, 4 HVIOs; differs only in non-volatile configuration defaults and minor timing parameters. | Identical functional scope; used where factory-programmed limp-home behavior or watchdog timeout defaults differ. | Select when matching existing UJA1132HW-based designs or requiring specific NVM factory settings. |
| TLE9471-2ES | Infineon SBC with 5 V/500 mA LDO, CAN FD transceiver (2 Mbit/s), single LIN, but no integrated boost converter - requires external buck-boost IC for sub-6 V operation. | Lacks autonomous low-voltage boost capability; suitable for 12 V-stable systems but not cold-crank resilient applications. | Choose only if battery never drops below 6 V and board space allows external SMPS components. |
Compared with UJA1131AHW/5F0/0Y, UJA1132HW/5V0 offers identical electrical and functional performance with minor NVM configuration differences, while TLE9471-2ES omits integrated boost functionality - making it unsuitable for automotive applications requiring operation below 6 V without additional power stage design.
Availability
UJA1131AHW/5F0/0Y is available at Aetrix Electronics and suitable for Engine Control Modules, Body Control Modules, ADAS ECUs, and Transmission Control Units requiring stable component supply across automotive production lifecycles.
Supply support for UJA1131AHW/5F0/0Y 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in automotive-grade analog and mixed-signal ICs.
The UJA113x product line was designed specifically for next-generation automotive Electronic Control Units, integrating power, communication, and safety functions into a single AEC-Q100 qualified SBC to reduce system complexity and bill-of-materials cost.
FAQ
What is the minimum battery voltage supported by UJA1131AHW/5F0/0Y in boost mode?
UJA1131AHW/5F0/0Y supports operation down to 2 V battery input in boost mode, maintaining regulated 5 V output to the microcontroller. This capability is verified per NXP's datasheet Section 2.2 and enables uninterrupted ECU function during automotive cold-crank events. The boost function activates automatically when input falls below the regulation threshold, requiring only a single external coil.
Does UJA1131AHW/5F0/0Y support CAN FD partial networking?
No, UJA1131AHW/5F0/0Y does not support CAN FD partial networking or CAN FD-passive wake-up. That feature is exclusive to UJA113xFD/x variants (e.g., UJA1131HW/FD/5V/4). UJA1131AHW/5F0/0Y implements full ISO 11898-2:201x-compliant CAN FD active communication up to 2 Mbit/s but lacks selective wake-up logic for CAN FD traffic in Sleep mode.
How many LIN transceivers does UJA1131AHW/5F0/0Y integrate?
UJA1131AHW/5F0/0Y integrates one LIN transceiver (LIN1), compliant with LIN 2.x and SAE J2602 standards. The second LIN channel (LIN2) is internally disconnected in this variant, as confirmed in Table 1 and Figure 3 of the datasheet. It is not user-configurable or externally accessible.
What is the purpose of the LIMP pin on UJA1131AHW/5F0/0Y?
The LIMP pin on UJA1131AHW/5F0/0Y is an active-low output that asserts during serious system malfunctions (e.g., overtemperature, watchdog timeout, or critical voltage fault) to activate external 'limp-home' hardware. It is driven LOW in Overload mode and can be configured via non-volatile memory to respond to specific fault conditions, ensuring fail-operational behavior in automotive ECUs.
Can UJA1131AHW/5F0/0Y operate without external passive components for its SMPS?
No, UJA1131AHW/5F0/0Y requires external components for its SMPS: one external coil (L1/L2), two bootstrap capacitors (CAPA/CAPB), two SMPS output capacitors, and optional input filtering. The datasheet explicitly states "The SMPS requires only a single external coil and some capacitors but no separate semiconductors." No active devices (e.g., MOSFETs or diodes) are needed, but passives are mandatory for operation.
UJA1131AHW/5F0/0Y Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
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- Packaging:
- Bulk
- Product Status:
- Active
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- Voltage - Output (Min/Fixed):
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- Voltage - Output (Max):
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UJA1131AHW/5F0/0Y FAQ
1.How can I place an order for UJA1131AHW/5F0/0Y through Aetrix?
Please submit a Request for Quotation (RFQ) for UJA1131AHW/5F0/0Y 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/5F0/0Y reliable?
The price and inventory of UJA1131AHW/5F0/0Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UJA1131AHW/5F0/0Y is usually 5 days.
3.What payment methods are accepted for UJA1131AHW/5F0/0Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UJA1131AHW/5F0/0Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UJA1131AHW/5F0/0Y?
UJA1131AHW/5F0/0Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UJA1131AHW/5F0/0Y 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/5F0/0Y?
For technical support, including UJA1131AHW/5F0/0Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UJA1131AHW/5F0/0Y requirements.
6.How does Aetrix verify that UJA1131AHW/5F0/0Y is sourced from the original manufacturer or authorized distributors?
All UJA1131AHW/5F0/0Y 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/5F0/0Y meets industry standards.
7.What is the process for return or replacement of UJA1131AHW/5F0/0Y?
All UJA1131AHW/5F0/0Y units undergo pre-shipment inspection (PSI). If there is an issue with UJA1131AHW/5F0/0Y, 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/5F0/0Y part is unused and in its original packaging.
Return procedure for UJA1131AHW/5F0/0Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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