UJA1169LTK/XZ

Specialized Overview

The UJA1169LTK/XZ is a mini high-speed CAN companion System Basis Chip (SBC) from NXP Semiconductors. It integrates an ISO 11898-2:201x compliant HS-CAN transceiver and a scalable 5 V, 250 mA low-drop voltage regulator (V1). The device features a dedicated VIO input pin for flexible microcontroller interfacing across different supply domains. It supports very low-current Standby and Sleep modes with bus and local wake-up capabilities. The variant includes a short-circuit proof 5 V supply (VEXT) for off-board components. Configuration settings are stored in non-volatile memory to define power-on and limp-home behavior.

Specialized Feature Summary

• Integrates a high-speed CAN transceiver supporting CAN FD active communication up to 2 Mbit/s.
• Provides a scalable 5 V, 250 mA low-drop voltage regulator (V1) with thermal management via external PNP transistor.
• Features autonomous bus biasing according to ISO 11898-6:2013 and ISO 11898-2:201x standards.
• Includes a watchdog with Window, Timeout, and Autonomous modes and a dedicated LIMP output pin for system failure flagging.

Specialized Applications

• Automotive applications requiring multiple transceivers or additional power supply resources.
• Secondary SBC roles where interface supply domain adaptation is necessary to prevent reverse supply currents.
• Systems needing off-board sensor supplies protected against battery, ground, and negative voltages.

Specialized Procurement Notes

Verify the specific ordering suffix requirements for the UJA1169LTK/XZ variant against the official NXP datasheet to ensure correct package and feature selection. Confirm that the Z suffix aligns with your manufacturing and compliance specifications. Cross-reference the part number with authorized distributors to validate current availability and lead times. Ensure all environmental and RoHS compliance documentation is obtained prior to procurement.

Specialized Selection Notes

Select the UJA1169LTK/XZ when a companion SBC is required alongside a primary SBC in automotive networks. This variant is suitable for applications needing a protected off-board sensor supply (VEXT) rather than an on-board CAN supply (V2). Consider this component if the design demands flexible I/O level shifting via the VIO pin to accommodate varying microcontroller supply voltages. Evaluate the need for CAN FD passive support if partial networking functionality is required.

Specialized Part Context

The UJA1169LTK/XZ belongs to the UJA1169L product series, designed as a companion chip for main system basis chips. It addresses scenarios where standard secondary SBCs face compatibility issues due to differing supply domains. By providing a dedicated VIO input, it isolates the host interface from the main SBC's supply constraints. This allows for scalable network architectures with additional power resources and independent diagnostic functions.

Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.