NXP Semiconductors UJA1131HW/FD/5V/0Y

Overview

UJA1131HW/FD/5V/0Y from NXP Semiconductors is a buck/boost System Basis Chip (SBC) for automotive ECUs, integrating a 5 V/500 mA LDO (V1), ISO 11898-2/6-compliant HS-CAN transceiver supporting CAN FD up to 2 Mbit/s, dual LIN transceivers, and CAN FD-passive partial networking. It delivers fail-safe power management with limp-home outputs and operates down to 2 V battery input via boost mode.

For engineers reviewing the UJA1131HW/FD/5V/0Y datasheet, UJA1131HW/FD/5V/0Y pinout, UJA1131HW/FD/5V/0Y application, or UJA1131HW/FD/5V/0Y equivalent, this SBC is selected for ECU designs requiring integrated CAN FD communication, dual-LIN interface, low-voltage operation, and configurable safety-critical power sequencing in harsh automotive environments.

Technical Context

The UJA1131HW/FD/5V/0Y implements a fully autonomous buck-boost SMPS with single-coil topology, automatically switching between Buck (for >6 V input) and Boost (for 2–6 V input) to sustain V1 output during battery dips. Its CAN transceiver complies with ISO 11898-2:201x and ISO 11898-6:2013, enabling CAN FD-passive partial networking-ignoring CAN FD traffic in Sleep mode without bus errors.

This variant features dual LIN transceivers (LIN 2.x compliant), two independent voltage regulators (V1 = 5 V/500 mA, V2 = 5 V/100 mA), battery monitoring via dual-channel 10-bit ADC, and SPI-configurable watchdog with Window/Timeout modes. It omits HVIO pins (as indicated by "/0" suffix), confirming no high-voltage I/O capability.

Key Specifications

Pinout & Package

UJA1131HW/FD/5V/0Y uses the HTQFP48 package (SOT1181-2) with 48 leads, 10 mm × 10 mm body, 1.0 mm height, and thermally enhanced exposed die pad connected to GND. The "/0" suffix confirms absence of HVIO pins (HVIO1–HVIO8 are not connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar System Basis Chip applications.

Compared with UJA1131HW/FD/5V/0Y, UJA1131HW/5V0 offers identical power and LIN capability but no CAN FD-passive sleep, while TLE9471-2ES reduces LIN flexibility and eliminates partial networking - making UJA1131HW/FD/5V/0Y uniquely suited for next-gen automotive domains requiring mixed-protocol efficiency and fail-safe low-power operation.

Availability

UJA1131HW/FD/5V/0Y is available at Aetrix Electronics and suitable for Body Control Modules, Engine Control Units, ADAS Sensor Hubs, and Electric Power Steering ECUs requiring stable component supply across automotive production lifecycles.

Supply support for UJA1131HW/FD/5V/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 series is designed specifically for automotive Electronic Control Units needing integrated power conversion, CAN FD/LIN communication, and fail-safe system control - targeting ASIL-B functional safety compliance and extended temperature operation.

FAQ

What does the "/FD/5V/0Y" suffix indicate in UJA1131HW/FD/5V/0Y?

The "/FD" denotes CAN FD-passive partial networking support per ISO 11898-6:2013; "/5V" specifies a 5 V nominal V1 output; "/0" confirms zero high-voltage I/O pins (no HVIO1–HVIO8); and "Y" indicates tape-and-reel packaging. This makes UJA1131HW/FD/5V/0Y distinct from non-FD or HVIO-equipped variants like UJA1131HW/FD/5V/4.

Does UJA1131HW/FD/5V/0Y support CAN FD communication at 5 Mbit/s?

No. UJA1131HW/FD/5V/0Y supports CAN FD up to 2 Mbit/s in the data field, as specified in its ISO 11898-2:201x compliance. It does not support 5 Mbit/s operation. The transceiver's timing parameters are validated only for ≤2 Mbit/s, and higher rates require different PHY implementations not present in this SBC.

Can UJA1131HW/FD/5V/0Y operate with a 3.3 V microcontroller supply?

No. The "/5V" in UJA1131HW/FD/5V/0Y explicitly defines a 5 V nominal V1 output regulator. For 3.3 V MCU supply, the functionally identical UJA1131HW/FD/3V/0Y variant must be used - it shares the same CAN FD-passive, dual-LIN, and buck-boost SMPS features but delivers 3.3 V ±2 % at 500 mA.

How does the CAN FD-passive feature prevent false wake-ups in UJA1131HW/FD/5V/0Y?

UJA1131HW/FD/5V/0Y's CAN FD-passive mode ignores CAN FD frames entirely while in Sleep/Standby, allowing classic CAN controllers to remain asleep during CAN FD traffic. This avoids spurious wake events and bus errors caused by FD frames - a key requirement for gateways and ECUs coexisting in hybrid CAN/CAN FD networks.

Is external circuitry required for the buck-boost SMPS in UJA1131HW/FD/5V/0Y?

Yes - the SMPS requires one external coil (L1/L2), two bootstrap capacitors (CAPA/CAPB), two SMPS output capacitors, and optional input filtering. No external FETs, diodes, or controllers are needed. The design uses a single-coil topology with integrated switches, minimizing external components while maintaining 2 V to 27 V input range operation.