Overview
The TJA1145TKJ is a high-speed CAN (Controller Area Network) transceiver manufactured by NXP USA Inc. This component is designed to provide an interface between a CAN protocol controller and the physical two-wire CAN bus, making it an essential part of high-speed CAN networks, particularly in the automotive industry.
The TJA1145TKJ is optimized for in-vehicle high-speed CAN communication and supports ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-4 standards. It features advanced power management, including low power consumption in Standby and Sleep modes, and supports CAN Partial Networking with selective wake-up functionality.
Key Specifications
| Parameter | Specification |
|---|---|
| Package Type | 14-HVSON (3x4.5) |
| Data Rate | Up to 2 Mbit/s |
| ESD Protection | ±8 kV (Human Body Model) on CAN bus pins, ±6 kV (IEC 61000-4-2) on BAT and WAKE pins |
| Short-Circuit Protection | CAN bus pins short-circuit proof to ±58 V |
| Transient Protection | Protected against transients according to ISO 7637-3, test pulses 1, 2a, 3a, and 3b |
| VIO Input | Direct interfacing with 3.3 V to 5 V microcontrollers |
| SPI Interface | 16-, 24-, or 32-bit SPI for configuration, control, and diagnosis |
| Wake-Up Functionality | Selective wake-up function with local and/or remote wake-up options |
Key Features
- ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-4 compliant
- Timing guaranteed for data rates up to 2 Mbit/s
- Autonomous bus biasing according to ISO 11898-2:2016
- Optimized for in-vehicle high-speed CAN communication
- No ‘false’ wake-ups due to CAN FD in TJA1145/FD variants
- Low power consumption in Standby and Sleep modes
- Supports CAN Partial Networking with selective wake-up functionality
- Transmitter disengages from the bus when the battery supply is removed
- 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
Applications
The TJA1145TKJ is primarily designed for high-speed CAN applications in the automotive industry. It is suitable for various in-vehicle networks, including those requiring low power consumption and advanced diagnostic features.
- In-vehicle high-speed CAN communication systems
- Automotive networks requiring low power consumption and selective wake-up functionality
- Systems needing advanced diagnostic and protection features
Q & A
- What is the TJA1145TKJ used for?
The TJA1145TKJ is a high-speed CAN transceiver used to provide an interface between a CAN protocol controller and the physical two-wire CAN bus in automotive applications.
- What are the key standards supported by the TJA1145TKJ?
The TJA1145TKJ supports ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-4 standards.
- What is the maximum data rate supported by the TJA1145TKJ?
The TJA1145TKJ supports data rates up to 2 Mbit/s.
- What kind of ESD protection does the TJA1145TKJ offer?
The TJA1145TKJ offers ±8 kV ESD protection according to the Human Body Model on CAN bus pins and ±6 kV ESD protection according to IEC 61000-4-2 on BAT and WAKE pins.
- How does the TJA1145TKJ manage power consumption?
The TJA1145TKJ features low power consumption in Standby and Sleep modes and supports selective wake-up functionality to minimize current consumption.
- What kind of transient protection does the TJA1145TKJ provide?
The TJA1145TKJ is protected against transients according to ISO 7637-3, test pulses 1, 2a, 3a, and 3b.
- Can the TJA1145TKJ interface directly with microcontrollers of different voltages?
Yes, the TJA1145TKJ allows direct interfacing with 3.3 V to 5 V microcontrollers via the VIO input.
- What diagnostic features does the TJA1145TKJ offer?
The TJA1145TKJ offers various diagnostic features including transmit data dominant time-out function, overtemperature warning and shut-down, undervoltage detection and recovery, and cold start diagnosis.
- How does the TJA1145TKJ handle wake-up functionality?
The TJA1145TKJ supports selective wake-up functionality with local and/or remote wake-up options, which can be disabled to reduce current consumption.
- What is the significance of the ‘FD-passive’ feature in the TJA1145TKJ?
The ‘FD-passive’ feature allows the transceiver to ignore CAN FD in the fast phase, enabling reliable communication at data rates up to 2 Mbit/s.
