HS CAN transceiver for partial networking

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The TJA1145 is a high-speed CAN transceiver that provides an interface between a Controller Area Network (CAN) protocol controller and the physical two-wire CAN bus. The transceiver is designed for high-speed CAN applications in the automotive industry, providing differential transmit and receive capability to (a microcontroller with) a CAN protocol controller.

The TJA1145 features very low power consumption in Standby and Sleep modes and supports ISO 11898-6:2013 compliant CAN Partial Networking by means of a selective wake-up function.

A dedicated implementation of the partial networking function has been embedded into the TJA1145/FD variants TJA1145T/FD and TJA1145TK/FD. This function is called ‘FD-passive’ and is the ability to ignore CAN FD frames while waiting for a valid wake-up frame in Sleep/Standby mode. This additional feature of partial networking is the a good fit fit for networks that support both CAN FD and standard CAN 2.0 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.

Advanced power management regulates the supply throughout the node and supports local and remote wake-up functionality. I/O levels are automatically adjusted to the I/O levels of the controller, allowing the TJA1145 to interface directly with 3.3 V to 5 V microcontrollers. An SPI interface is provided for transceiver control and for retrieving status information. Bus connections are truly floating when power is off.

The TJA1145 implements the CAN physical layer as defined in the current ISO11898 standards (ISO11898-2:2003, ISO11898-5:2007 and ISO11898-6:2013) and the pending updated version of ISO 11898-2:2016). Pending the release ISO11898-2:2016 including CAN FD and SAE-J2284-4, 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.

These features make the TJA1145 a good choice for high-speed CAN networks containing nodes that are always connected to the battery supply line but, in order to minimize current consumption, are only active when required by the application.

Data Sheet

Product Details

Features

General

Fully compliant with the ISO 11898-2:2003, ISO 11898-5:2007 and ISO 11898-6:2013 standards
Timing guaranteed for data rates up to 2 Mbit/s
Autonomous bus biasing according to ISO 11898-6:2013
Optimized for in-vehicle high-speed CAN communication
No ‘false’ wake-ups due to CAN FD frame detection in TJA1145/FD variants

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 and WAKE and on the CAN bus pins
CAN bus pins short-circuit proof to ±58 V
Battery and CAN bus pins protected against transients according to ISO 7637-3, test pulses 1, 2a, 3a and 3b
Suitable for use in 12 V and 24 V systems
Available in SO14 and leadless HVSON14 package (3 mm x 4.5 mm) with improved Automated Optical Inspection (AOI) capability
AEC-Q100 qualified
Dark green product (halogen free and Restriction of Hazardous Substances (RoHS) compliant)

Advanced ECU power management system

Very low-current Standby and Sleep modes, with full wake-up capability
Entire node can be powered down via the inhibit output
Remote wake-up capability via standard CAN wake-up pattern or via ISO 11898-6:2013 and ISO 11898-2:2003 compliant selective wake-up frame detection
Local wake-up via the WAKE pin
Wake-up source recognition
Bit rates of 50 kbit/s, 100 kbit/s, 125 kbit/s, 250 kbit/s, 500 kbit/s and 1 Mbit/s supported during selective wake-up
Local and/or remote wake-up can be disabled to reduce current consumption
Transceiver disengages from the bus when the battery supply is removed
VIO input allows for direct interfacing with 3.3 V to 5 V microcontrollers

Protection and diagnosis

16-, 24- or 32-bit SPI for configuration, control and diagnosis
Transmit Data (TXD) dominant time-out function with diagnosis
Overtemperature warning and shut-down
Undervoltage detection and recovery on pins VCC, VIO and BAT
Cold start diagnosis (via bits PO and NMS)
Advanced system and transceiver interrupt handling

Comparison Table

Part Number	New Generation Recommendation
TJA1145T,118	TJA1145AT/0Z
TJA1145T/FDJ	TJA1145AT/FD/0Z
TJA1145TK/FDJ	TJA1145ATK/FD/0Z
TJA1145TKJ	TJA1145ATK/0Z

Buy/Parametrics

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