NXP Semiconductors UJA1169ATK/F/3Z

Overview

UJA1169ATK/F/3Z from NXP Semiconductors is a mini high-speed CAN System Basis Chip (SBC) integrating an ISO 11898-2:2016 and SAE J2284-1–5 compliant HS-CAN transceiver supporting CAN FD up to 5 Mbit/s, a scalable 3.3 V / 250 mA microcontroller supply (V1), a dedicated 5 V / 100 mA CAN supply (V2), SPI interface, watchdog, and LIMP fault signaling - deployed in automotive body control modules for ECU power management and robust CAN communication.

For engineers reviewing the UJA1169ATK/F/3Z datasheet, UJA1169ATK/F/3Z pinout, UJA1169ATK/F/3Z application, or UJA1169ATK/F/3Z equivalent, key selection considerations include CAN FD passive partial networking support, dual-regulator architecture (V1 + V2), HVSON20 thermal performance, wake-up source discrimination, and non-volatile configuration of reset thresholds and limp behavior.

Technical Context

The UJA1169ATK/F/3Z implements a fully autonomous ISO 11898-2:2016 physical layer with floating CAN bus pins when BAT is off and supports selective wake-up frame detection with CAN FD-passive mode - enabling classic CAN controllers to remain in Sleep/Standby during CAN FD traffic without bus errors. Its system controller manages seven deterministic operating modes (Normal, Standby, Sleep, Reset, Forced Normal, Overtemp, Off) via SPI-controlled state transitions.

Power management includes V1 (3.3 V / 250 mA) turned off in Sleep mode, V2 (5 V / 100 mA) user-controllable via SPI, and hardware-based overtemperature warning/shutdown with LIMP output activation. The watchdog operates in Window, Timeout, or Autonomous modes with eight selectable periods (8 ms–4 s), and all configuration settings - including undervoltage reset thresholds and RSTN timing - are stored in non-volatile memory.

Key Specifications

Pinout & Package

HVSON20 package (SOT1360-1) with 20-terminal leadless construction, 3.5 mm × 5.5 mm body, 0.85 mm height, and exposed die pad connected to GND for optimal thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CAN SBC applications.

Compared with UJA1169ATK/F and TJA1145A, the UJA1169ATK/F/3Z uniquely combines 3.3 V MCU regulation, dedicated V2 for CAN, CAN FD-passive partial networking, and non-volatile configuration - making it the only option among the three qualified for 3.3 V microcontroller-based CAN FD ECUs requiring zero-bus-noise wake-up discrimination.

Availability

UJA1169ATK/F/3Z is available at Aetrix Electronics and suitable for automotive body control modules, door control units, seat control systems, and roof modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant CAN SBC functionality.

Supply support for UJA1169ATK/F/3Z 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, SBC, and automotive processor technologies.

The UJA1169A product line is designed specifically for automotive electronic control units requiring integrated CAN transceivers, multi-rail power management, and robust diagnostic capabilities - targeting body electronics, chassis, and gateway applications.

FAQ

What is the maximum CAN FD data rate supported by the UJA1169ATK/F/3Z?

The UJA1169ATK/F/3Z supports CAN FD active communication up to 5 Mbit/s in the CAN FD data field, as specified in ISO 11898-2:2016. This enables high-speed firmware updates and real-time sensor data streaming in modern automotive ECUs. The transceiver maintains full compliance with SAE J2284-1 through J2284-5 standards at this rate.

Does the UJA1169ATK/F/3Z support partial networking with CAN FD-passive functionality?

Yes, the UJA1169ATK/F/3Z supports ISO 11898-2:2016 compliant partial networking with CAN FD-passive mode. As an /F variant, it ignores CAN FD traffic during Sleep/Standby while still detecting selective wake-up frames - preventing false wake-ups in mixed CAN FD/classic CAN networks without compromising bus integrity.

What are the output voltages and current capabilities of the integrated regulators in the UJA1169ATK/F/3Z?

The UJA1169ATK/F/3Z integrates two regulators: V1 delivers 3.3 V ±2 % at up to 250 mA for the microcontroller, and V2 delivers 5 V ±2 % at up to 100 mA for the internal CAN transceiver and on-board peripherals. V1 is disabled in Sleep mode; both outputs are short-circuit protected to GND.

How is wake-up source discrimination implemented in the UJA1169ATK/F/3Z?

The UJA1169ATK/F/3Z identifies wake-up sources via status bits in the Main Status Register (RSS field) and asserts RXD LOW for pending wake-up events. Supported sources include standard CAN wake-up, ISO-compliant selective wake-up frames, local WAKE pin assertion, watchdog overflow, and overtemperature events - all distinguishable in software without external circuitry.

What package type and thermal characteristics does the UJA1169ATK/F/3Z use?

The UJA1169ATK/F/3Z uses the HVSON20 (SOT1360-1) package: 3.5 mm × 5.5 mm × 0.85 mm, leadless, with an exposed die pad. Thermal resistance (R_θJA) is optimized via the pad, which must be soldered to a PCB GND plane. The package is halogen-free and RoHS-compliant, meeting automotive reliability standards.

Can the reset behavior and limp-home activation thresholds of the UJA1169ATK/F/3Z be customized?

Yes, the UJA1169ATK/F/3Z stores configuration parameters - including RSTN pulse width, undervoltage reset thresholds (60 %, 70 %, 80 %, or 90 % of V1), and LIMP activation conditions - in non-volatile memory. These settings persist across power cycles and are programmed via SPI, eliminating the need for external components or factory rework.