TJA1043
TJA1043 is a third-generation high-speed CAN transceiver with improved EMC, ESD, and low power consumption.
Product Overview
Description
The TJA1043 is a third-generation high-speed CAN transceiver providing an interface between a CAN protocol controller and the physical two-wire CAN bus.
It offers significant improvements over previous generations including improved EMC and ESD performance, very low power consumption, and passive behavior when supply voltage is off.
The device supports CAN FD with data rates up to 5 Mbit/s in the fast phase.
Product Series
TJA
Primary Application
Automotive CAN networks
Key Features
- Third-generation CAN transceiver
- CAN FD capable up to 5 Mbit/s
- Excellent EMC and ESD performance
- Very low power consumption in sleep mode
- Passive behavior when supply off
- Local and remote wake-up capability
- Wake-up source recognition
- Bus line short-circuit detection
- Battery connection detection
Specifications
| Protocol | CAN 2.0 and CAN FD |
|---|---|
| Data Rate | Up to 5 Mbit/s (CAN FD fast phase) |
| Standards | ISO 11898-2:2003, ISO 11898-5:2007 |
| Supply | 3V to 5V microcontroller interface |
| ESD | High ESD handling capability |
| EMC | Improved electromagnetic compatibility |
| Modes | Normal, Standby, Sleep, Power-on |
| Wake-up | Local and remote wake-up with source recognition |
| Protection | Bus line short-circuit detection, battery connection detection |
Applications
Automotive CAN networks
Automotive and EV electronics
Body control modules
Industrial automation and control
Powertrain systems
Electronic system design
Chassis control
Industrial automation and control
Diagnostic interfaces
Communication and interface
Industrial CAN networks
Industrial automation and control
FAE Expert Insights
"The TJA1043 is my standard recommendation for automotive CAN applications. The CAN FD support future-proofs designs, and the improved EMC performance helps pass stringent automotive requirements. The wake-up source recognition is particularly useful for diagnosing wake events in complex networks. The passive behavior when supply is off prevents bus disruption when nodes are powered down."
Third-gen CAN transceiver with CAN FD support
— Michael Zhang, BeiLuo
Frequently Asked Questions
What is CAN FD and why is it important?
CAN FD (Flexible Data-rate) is the next generation of CAN protocol that increases data rates up to 5 Mbit/s during the data phase while maintaining compatibility with classic CAN. It allows faster firmware updates and more data throughput, essential for modern automotive networks.
Use TJA1043 for new designs to enable CAN FD capability.
What are the power management features?
TJA1043 supports Normal, Standby, and Sleep modes with very low power consumption in sleep mode. It supports both local wake-up (via WAKE pin) and remote wake-up (via CAN bus activity). The wake-up source recognition helps identify what caused the wake event.
Use sleep mode for power-sensitive applications. Enable wake-up source recognition for diagnostics.
How does passive behavior when supply off work?
When the supply voltage is turned off, TJA1043 presents a high impedance to the CAN bus, effectively disconnecting from the network. This prevents an unpowered node from disturbing communication between other nodes on the bus.
Essential for networks where nodes may be powered down independently.
What support is available for TJA1043?
Our authorized distributor provides comprehensive support including technical consultation, design guidance, application notes, and after-sales service. Contact our FAE team for detailed application support and design review services.
Contact FAE for technical support and guidance.
What is the recommended PCB layout for TJA1043?
Follow the application notes for recommended PCB layout guidelines. Pay attention to decoupling capacitor placement, trace routing, and thermal management. Reference designs are available from our distributor.
Follow application notes and reference designs for optimal layout.