Safe Assure® (Functional Safety)
When it comes to functional safety, NXP stands for quality and reliability. Our SafeAssure program simplifies system-level safety requirements in accordance with ISO 26262.
CAN FD Transceiver with Partial Networking, CAN FD Data Rates Up to 5 Mbit/s
The TJA1445 CAN FD transceiver with partial networking sleep mode, is part of the TJA144x transceiver family that implements CAN FD as defined in ISO11898-2:2024 parameter sets A-B. The TJA1445 is fully interoperable with the high-speed classical CAN and CAN FD protocols, and fully developed and certified to be ISO 26262 ASIL-B compliant.
The TJA1445 supports CAN partial networking by means of selective wake-up functionality as specified in ISO 11898-2:2024, allowing the transceiver to remain in sleep mode even when CAN bus traffic is running, when it is not required to be active.
The TJA1445B offers an extended feature set on top of the TJA1445A, including a TXEN_N pin for disabling the transmitter through an external pin, and three GPIO pins which can be configured to an extended set of functionalities, including e.g. a second TXD/RXD channel.
The TJA1445 offers a CAN FD passive feature, which in sleep mode prevents the transceiver from waking up and shields the CAN controller from CAN FD messages when running a mixed bus communication.
Product Details
Block Diagram
Features
General Features
- ISO 11898-2:2024 parameter sets A-B, SAE J2284-1 to SAE J2284-5 and SAE J1939-14 compliant
- ISO 26262, ASIL B compliant
- Partial networking capability through selective wake-up functionality
- Configurable general-purpose I/O (GPIO) pins (TJA1445B)
- Direct transmitter on/off control input (TXEN_N) (TJA1445B)
- Autonomous bus biasing
- Low electromagnetic emission (EME) and high electromagnetic immunity (EMI)
- Qualified according to AEC-Q100 Grade 1
- VIO input for interfacing with 1.8 V, 3.3 V to 5 V microcontrollers
- TJA1445A available in SO14 and HVSON14 package
- TJA1445B available in a DHVQFN18 package
Predictable and Fail-Safe Behavior
- Undervoltage detection on all supply pins with defined behavior below the undervoltage thresholds
- Functionality is guaranteed from the undervoltage detection thresholds up to the maximum limiting voltage values
- Transceiver disengages from the bus (high-ohmic) when the battery voltage drops below the Off mode threshold
- Internal biasing of TXD to enable defined fail-safe behavior
Low-Power Management
- Very low-current Standby and Sleep modes, with local and remote wake-up capability
- Local wake-up via the WAKE pin
- Remote wake-up via a wake-up pattern (WUP) or wake-up frame (WUF)
- Configurable CAN wake-up pattern (dom-rec-dom or dom-rec-dom-rec) according to ISO 11898-2:2024
- Selective wake-up according to ISO 11898-2:2024
Diagnosis and Protection
- Overtemperature diagnosis and protection
- Transmit data (TXD) dominant time-out diagnosis and protection
- Bus dominant failure diagnosis
- Cold start diagnosis (first battery connection)
- High ESD handling capability on the bus pins
- Bus pins and VBAT protected against automotive transients
Product Program
Product Longevity
Participating products are available for a minimum of 10 years. Designated participating products developed for the automotive, telecom and medical segments are available for a minimum of 15 years.
Related products
Buy/Parametrics
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Documentation
Quick reference to our documentation types.
4 documents
Compact List
Application Note (1)
Data Sheet (1)
Fact Sheet (1)
White Paper (1)
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The Power of CAN Partial Networking in Software-Defined Electric Vehicles[POWER-OF-CAN-PARTIAL-NETWORKING-SDE-VEHICLES-WP]
Design Resources
Hardware
Quick reference to our
board types.
1 hardware offering
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Evaluation and Development BoardsTJA1445A CAN FD with Partial Networking - Arduino® Based IO Evaluation Board
Software
Quick reference to our software types.
2 software files
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Debugging and Visualization Tools
FlexGUI: Software Tool for Evaluation of Reference Design Kits
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Software Development Resources
S32K1 CANTRCV TJA14XX Software
Note: For better experience, software downloads are recommended on desktop.