UJA1169ATK/F/3Z

Specialized Overview

The UJA1169ATK/F/3Z is a mini high-speed CAN System Basis Chip (SBC) from NXP Semiconductors. It integrates an ISO 11898-2:2016 and SAE J2284 compliant HS-CAN transceiver supporting CAN FD up to 5 Mbit/s, alongside a scalable 3.3 V microcontroller supply (V1). This variant includes partial networking with CAN FD-passive support and features a second on-board 5 V regulator (V2) for internal CAN transceiver and on-board hardware. The device operates in low-current Standby and Sleep modes with bus and local wake-up capabilities.

Specialized Feature Summary

• Integrates a high-speed CAN transceiver compliant with ISO 11898-2:2016 and SAE J2284 standards, supporting CAN FD active communication up to 5 Mbit/s.
• Includes a scalable 3.3 V low-drop voltage regulator (V1) for the microcontroller and a dedicated 5 V on-board supply (V2) for the CAN transceiver and additional loads.
• Supports ISO 11898-2:2016 compliant CAN partial networking with selective wake-up and CAN FD-passive functionality to ignore CAN FD traffic during sleep or standby.
• Features a watchdog timer with Window, Timeout, and Autonomous modes, along with SPI-based configuration and diagnostic control.

Specialized Applications

• Automotive electronic control units requiring reliable high-speed CAN communication
• Networks supporting mixed classic CAN and CAN FD protocols
• Microcontroller power management systems needing integrated voltage regulation

Specialized Procurement Notes

Verify the specific ordering suffix /F/3Z against the manufacturer's current datasheet to confirm the presence of partial networking and the 3.3 V regulator configuration. Ensure compatibility with the target microcontroller interface and validate that the HVSON20 package dimensions meet the PCB layout requirements.

Specialized Selection Notes

Select this variant when a 3.3 V microcontroller supply is required alongside a separate 5 V supply for the CAN transceiver. The /F suffix indicates support for partial networking and CAN FD-passive, which is essential for networks containing both CAN FD and classic CAN nodes. Confirm that the external PNP transistor concept for thermal scaling is integrated into the design.

Specialized Part Context

The UJA1169A family consists of six variants differentiated by their voltage regulators and networking features. The UJA1169ATK/F/3Z specifically combines the 3.3 V V1 regulator, the 5 V V2 on-board supply, and the partial networking capabilities found in the /F versions. This places it within the automotive-grade system basis chip category designed for robust CAN network integration.

Specialized Replacement Considerations

Direct substitutes within the UJA1169A family include the UJA1169ATK/3Z if partial networking is not required. Verify pinout compatibility and ensure that the replacement part supports the same 3.3 V V1 and 5 V V2 regulator configurations as specified in the original design.

Specialized FAQ

What is the function of the CAN FD-passive feature in this variant?

CAN FD-passive allows the UJA1169ATK/F/3Z to ignore CAN FD bus traffic while in Sleep or Standby mode. This prevents normal CAN controllers without CAN FD capability from generating bus errors during CAN FD communication.

How is the microcontroller supply regulated in the UJA1169ATK/F/3Z?

The UJA1169ATK/F/3Z uses a scalable 3.3 V low-drop voltage regulator (V1) for the microcontroller supply. It is based on an external PNP transistor concept to allow for thermal scaling and current limiting above 250 mA.

What is the purpose of the V2 regulator in this specific model?

The V2 regulator provides a dedicated 5 V supply for the internal CAN transceiver and can also be used to supply additional on-board hardware. It is short-circuit proof to ground and has a current limit above 100 mA.