描述 Description

The UJA1169L mini high-speed CAN companion System Basis Chip (SBC) belongs to the UJA1169product series and can be used as a companion chip in applications where a second SBC isdedicated to the application microcontroller. It contains an ISO 11898-2:201x (upcomingmerged ISO 11898-2/5/6) compliant HS-CAN transceiver and an integrated 5 V 250 mAscalable supply (V1) for additional transceivers and/or other loads. It also features awatchdog and a Serial Peripheral Interface (SPI). The UJA1169L companion SBC can beoperated in very low-current Standby and Sleep modes with bus and local wake-upcapability.
The UJA1169L is designed to be used in applications that require more than onetransceiver or additional power supply resources. Using a standard device as thesecondary SBC in an application can be problematic. The secondary SBC will have adifferent interface supply domain to the main SBC, creating a high risk of reversesupply currents. The UJA1169L resolves this issue by providing a dedicated VIO input pinthat allows it to adapt to any other supply domain.
Incorporating the UJA1169L companion SBC in an application allows it to be easily scaledor 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 withindependent LIMP output for special ASIL-related applications.
The UJA1169L comes in four variants. The UJA1169LTK and UJA1169LTK/F feature a secondon-board 5 V regulator (V2) that supplies the internal CAN transceiver and can also beused to supply additional on-board hardware.
The UJA1169LTK/X and UJA1169LTK/X/F are equipped with a 5 V supply (VEXT) for off-boardcomponents. 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 ISO11898-2:201x compliant CAN partial networking with a selective wake-up functionincorporating CAN FD-passive. CAN FD-passive is a feature that allows CAN FD bus trafficto be ignored in Sleep/Standby mode. CAN FD-passive partial networking is the perfectfit for networks that support both CAN FD and classic CAN communications. It allowsnormal CAN controllers that do not need to communicate CAN FD messages to remain inpartial networking Sleep/Standby mode during CAN FD communication without generating buserrors.
The UJA1169L implements the standard CAN physical layer as defined in the currentISO11898 standard (-2:2003, -5:2007, -6:2013). Pending the release of the upcomingversion of ISO11898-2:201x including CAN FD, additional timing parameters defining loopdelay symmetry are included. This implementation enables reliable communication in theCAN 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 arrangementmakes it possible to configure the power-on and limp-home behavior of the UJA1169L tomeet the requirements of different applications.

特性 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)
? 5 V nominal output; ±2 % accuracy
? 100 mA output current capability
? Current limiting above 100 mA
? Excellent transient response with a small ceramic output capacitor
? Output is short-circuit proof to GND
? User-defined on/off behavior via SPI
Off-board sensor supply (VEXT; UJA1169LTK/X and UJA1169LTK/X/F only)
? 5 V nominal output; ±2 % accuracy
? 100 mA output current capability
? Current limiting above 100 mA
? 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
? User-defined on/off behavior via SPI
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