UJA1169LTK/XZ

CAN Interface IC BL Advanced Automotive Analog

Overview

The UJA1169L mini high-speed CAN companion System Basis Chip SBC belongs to the UJA1169 product series and can be used as a companion chip in applications where a second SBC is dedicated to the application microcontroller. It contains an ISO 11898-2:201x upcoming merged ISO 11898-2/5/6 compliant HS-CAN transceiver and an integrated 5 V 250 mA scalable supply V1 for additional transceivers and/or other loads. It also features a watchdog and a Serial Peripheral Interface SPI. The UJA1169L companion SBC can be operated in very low-current Standby and Sleep modes with bus and local wake-up capability.

The UJA1169L is designed to be used in applications that require more than one transceiver or additional power supply resources. Using a standard device as the secondary SBC in an application can be problematic. The secondary SBC will have a different interface supply domain to the main SBC, creating a high risk of reverse supply currents. The UJA1169L resolves this issue by providing a dedicated VIO input pin that allows it to adapt to any other supply domain.

Incorporating the UJA1169L companion SBC in an application allows it to be easily scaled or extended by adding, for example, an additional 5 V power supply, CAN transceiver, off-board 5 V sensor supply or even a secondary independent watchdog function with independent LIMP output for special ASIL-related applications.

The UJA1169L comes in four variants. The UJA1169LTK and UJA1169LTK/F feature a second on-board 5 V regulator V2 that supplies the internal CAN transceiver and can also be used to supply additional on-board hardware.

The UJA1169LTK/X and UJA1169LTK/X/F are equipped with a 5 V supply VEXT for off-board components. VEXT is short-circuit proof to the battery, ground and negative voltages. The integrated CAN transceiver is supplied internally via V1.

The UJA1169LTK/F and UJA1169LTK/X/F variants support ISO 11898-6:2013 and ISO 11898-2:201x compliant CAN partial networking with a selective wake-up function incorporating CAN FD-passive. CAN FD-passive is a feature that allows CAN FD bus traffic to be ignored in Sleep/Standby mode. CAN FD-passive partial networking is the perfect fit for networks that support both CAN FD and classic CAN communications. It allows normal CAN controllers 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.

The UJA1169L implements the standard CAN physical layer as defined in the current ISO11898 standard -2:2003, -5:2007, -6:2013. Pending the release of the upcoming version of ISO11898-2:201x including CAN FD, additional timing parameters defining loop delay symmetry are included. This implementation enables reliable communication in the CAN FD fast phase at data rates up to 2 Mbit/s.

A dedicated LIMP output pin is provided to flag system failures.

A number of configuration settings are stored in non-volatile memory. This arrangement makes it possible to configure the power-on and limp-home behavior of the UJA1169L to meet the requirements of different applications.

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## Features

### General

* ISO 11898-2:201x upcoming merged ISO 11898-2/5/6 compliant 1 Mbit/s high-speed CAN transceiver supporting CAN FD active communication up to 2 Mbit/s in the CAN FD data field all four variants

* Autonomous bus biasing according to ISO 11898-6:2013 and ISO 11898-2:201x

* Scalable 5 V 250 mA low-drop voltage regulator V1 based on external PNP transistor concept for thermal scaling

* CAN-bus connections are truly floating when power to pin BAT is off

* No ‘false’ wake-ups due to CAN FD traffic in variants supporting partial networking

### Designed for automotive applications

* ±8 kV ElectroStatic Discharge ESD protection, according to the Human Body Model HBM on the CAN-bus pins

* ±6 kV ESD protection according to IEC 61000-4-2 on pins BAT, WAKE, VEXT and the CAN-bus pins

* CAN-bus pins short-circuit proof to ±58 V

* Battery and CAN-bus pins protected against automotive transients according to ISO 7637-3

* Very low quiescent current in Standby and Sleep modes with full wake-up capability

* Leadless HVSON20 package 3.5 mm × 5.5 mm with improved Automated Optical Inspection AOI capability and low thermal resistance

* Dark green product halogen free and Restriction of Hazardous Substances RoHS compliant

### Low-drop voltage regulator V1

* 5 V nominal output; ±2 % accuracy

* 250 mA output current capability

* V1 remains operational down to a battery voltage of 2 V

* V1 undervoltage detection with selectable detection thresholds of 60 %, 70 %, 80 % or 90 % of output voltage, configurable in non-volatile memory

* Excellent transient response with a small ceramic output capacitor

* Output is short-circuit proof to GND

* Turned off in Sleep mode

### On-board CAN supply V2; UJA1169LTK and UJA1169LTK/F only

* 100 mA output current capability

* Current limiting above 100 mA

* User-defined on/off behavior via SPI

### Off-board sensor supply VEXT; UJA1169LTK/X and UJA1169LTK/X/F only

* Excellent transient response with a small ceramic output load capacitor

* Output is short-circuit proof to BAT, GND and negative voltages down to -18 V

### Power Management

* Standby mode featuring very low supply current; voltage V1 remains active

* Sleep mode featuring very low supply current with voltage V1 switched off

* Remote wake-up capability via standard CAN wake-up pattern or ISO 11898-6:2013 and ISO 11898-2:201x compliant selective wake-up frame detection including CAN FD passive support /F versions only

* Local wake-up via the WAKE pin

* Wake-up source recognition

* VIO input allows for direct interfacing with 3.3 V to 5 V microcontrollers

### System control and diagnostic features

* Mode control via the Serial Peripheral Interface SPI

* Overtemperature warning and shutdown

* Watchdog with Window, Timeout and Autonomous modes and microcontrollerindependent clock source

* Optional cyclic wake-up in watchdog Timeout mode

* Watchdog automatically re-enabled when wake-up event captured

* Watchdog period selectable between 8 ms and 4 s

* LIMP output pin with configurable activation threshold

* Watchdog failure and overtemperature events trigger the dedicated LIMP output signal

* 16-, 24- and 32-bit SPI for configuration, control and diagnosis

* Customer configuration of selected functions via non-volatile memory

* Dedicated modes for software development and end-of-line flashing

## Features

* Dedicated modes for software development and end-of-line flashing