UJA1169ATK/X/FZ

Specialized Overview

The UJA1169ATK/X/FZ is a mini high-speed CAN System Basis Chip (SBC) from NXP Semiconductors, housed in an HVSON20 package. It integrates an ISO 11898-2:2016 and SAE J2284 compliant HS-CAN transceiver supporting CAN FD active communication up to 5 Mbit/s. The device features a scalable 5 V microcontroller supply (V1) with 250 mA output capability and a dedicated 5 V off-board sensor supply (VEXT) with 100 mA current limit. Key functional blocks include a watchdog timer, Serial Peripheral Interface (SPI), and non-volatile memory for configuration. It supports low-current Standby and Sleep modes with bus and local wake-up capabilities.

Specialized Feature Summary

• Supports CAN partial networking with selective wake-up and CAN FD-passive functionality to ignore CAN FD traffic during sleep or standby.
• Includes a protected 5 V off-board sensor supply (VEXT) short-circuit proof to battery, ground, and negative voltages.
• Features autonomous bus biasing ensuring CAN-bus connections remain floating when power is off.
• Provides hardware and software compatibility within the UJA1169 product family.

Specialized Applications

• Automotive networks requiring both CAN FD and classic CAN communications
• Microcontroller system basis chip integration with external sensor supplies
• Low-power automotive electronic control units utilizing partial networking

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm the presence of the /X variant features and /F partial networking support. Ensure the component matches the HVSON20 package dimensions and terminal count specified in the official documentation before procurement.

Specialized Selection Notes

Select this variant specifically for applications requiring an off-board 5 V supply (VEXT) rather than an internal CAN supply (V2). Confirm that the host microcontroller operates within the supported voltage range and that the design accommodates the external PNP transistor required for the V1 regulator thermal scaling.

Specialized Part Context

This component belongs to the UJA1169A family of mini high-speed CAN system basis chips. The 'TK' indicates the HVSON20 package, '/X' denotes the inclusion of the protected VEXT supply, and '/F' signifies support for CAN partial networking. This specific combination targets automotive systems needing isolated external power management alongside advanced network sleep modes.

Specialized Replacement Considerations

Compatible variants within the same family include UJA1169ATK/X, UJA1169ATK/F, and UJA1169ATK. Note that these alternatives lack either the partial networking feature or the specific VEXT supply configuration found in the UJA1169ATK/X/FZ.

Specialized FAQ

What is the primary difference between the VEXT supply in this model and the V2 supply in other variants?

The VEXT supply in the UJA1169ATK/X/FZ is designed for off-board components and is short-circuit proof to the battery, ground, and negative voltages down to -18 V. In contrast, the V2 supply found in non-X variants is intended for internal CAN transceiver and on-board hardware and lacks protection against negative voltages.

How does the CAN FD-passive feature benefit mixed-network environments?

CAN FD-passive allows nodes that do not need to communicate CAN FD messages to remain in partial networking Sleep/Standby mode during CAN FD communication without generating bus errors, effectively ignoring the high-speed CAN FD traffic.

Is the integrated CAN transceiver supplied by V1 or V2 in this specific part number?

In the UJA1169ATK/X and UJA1169ATK/X/F variants, the integrated CAN transceiver is supplied internally via V1, in parallel with the microcontroller, rather than via a separate V2 regulator.