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 and Advanced System Monitoring, CAN FD Data Rates Up to 5 Mbit/s
The TJA1446 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 TJA1446 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 TJA1446 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 TJA1446 offers an extended feature set on top of the TJA1445, including two configurable GPIO pins, a Q&A watchdog with dedicated reset and failsafe/limp home pins and accurate VIO undervoltage and overvoltage monitoring.
The TJA1446 offers a CAN FD/ CAN XL passive feature, which in sleep mode prevents the transceiver from waking up and shields the CAN controller from CAN FD and CAN XL messages when running a mixed bus communication.
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
- Q&A watchdog with window and timeout modes
- Configurable general-purpose I/O (GPIO) pins
- 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
- Available in 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
- Dedicated failsafe pin, configurable for limp-home or failsafe output functionality
- Dedicated reset pin for triggering and detecting reset events
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
- Overvoltage detection with defined behavior on VIO supply pin
- 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.
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Design Resources
Engineering Services
To get further assistance directly from NXP, please see our Engineering Services.
1 engineering service
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Independent Design House (IDH)
Elektrobit DLE Digital Life Experience
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