UJA1169ATK/3Z

Specialized Overview

The UJA1169ATK/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 regulator (V1). The device features a watchdog timer, SPI interface, and low-current Standby and Sleep modes with bus and local wake-up capabilities. It utilizes a leadless HVSON20 package.

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 for the microcontroller supply, featuring thermal management via an external PNP transistor concept.
• Supports very low-current Standby and Sleep modes with full wake-up capability via standard CAN patterns or selective wake-up frames.
• Provides comprehensive system control and diagnostic features including a watchdog with multiple modes, overtemperature protection, and a dedicated limp-home output.

Specialized Applications

• Automotive electronic control units requiring reliable high-speed CAN communication
• Systems utilizing CAN FD networks with data rates up to 5 Mbit/s
• Applications demanding low-power standby and sleep modes with remote wake-up functionality

Specialized Procurement Notes

Verify the specific ordering suffix Z against official documentation to confirm compliance details such as halogen-free status or RoHS certification. Ensure the selected variant matches the required voltage regulator configuration, specifically the 3.3 V output for the UJA1169ATK/3 series. Cross-reference pin assignments and package dimensions with the latest datasheet revision prior to PCB layout finalization.

Specialized Selection Notes

Select the UJA1169ATK/3Z when a 3.3 V microcontroller supply is required, distinguishing it from 5 V variants like the UJA1169ATK. Consider the integrated CAN FD support if future-proofing for higher data rates is necessary. Evaluate the need for partial networking features; this specific variant lacks the /F suffix indicating CAN FD-passive support. Confirm that the external PNP transistor approach for thermal scaling aligns with the system's power dissipation requirements.

Specialized Part Context

The UJA1169A family comprises six variants differentiated by their onboard voltage regulators and additional features. The UJA1169ATK/3Z belongs to the subset containing a 3.3 V regulator (V1) and a second on-board 5 V regulator (V2) for internal CAN transceiver supply. This distinguishes it from /X variants which feature an off-board sensor supply (VEXT) instead of V2.

Specialized Replacement Considerations

Direct replacements within the UJA1169A family include the UJA1169ATK/F/3Z, which adds partial networking support. Other compatible options are the UJA1169ATK/3 without the Z suffix if packaging variations exist. Verify functional equivalence regarding the 3.3 V regulator and V2 supply before substitution.

Specialized FAQ

What is the primary difference between the UJA1169ATK/3Z and the UJA1169ATK/X/FZ?

The UJA1169ATK/3Z features a second on-board 5 V regulator (V2) for internal CAN transceiver supply, whereas the UJA1169ATK/X/FZ provides a 5 V supply (VEXT) for off-board components. Additionally, the /FZ variant supports CAN partial networking with CAN FD-passive, which the /3Z does not.

Does the UJA1169ATK/3Z support CAN FD communication?

Yes, the UJA1169ATK/3Z supports CAN FD active communication up to 5 Mbit/s in the CAN FD data field, compliant with ISO 11898-2:2016 and SAE J2284 standards.

How is thermal management handled for the V1 regulator in the UJA1169ATK/3Z?

Thermal management for the V1 regulator is achieved via an optional external PNP transistor connected to the VEXCTRL and VEXCC pins. This design allows for current limiting above 250 mA and improved heat dissipation.