NXP Addresses CAN FD Bandwidth Limitations with Signal Quality Improvement Technology

Eindhoven, The Netherlands – October 19, 2021 – NXP Semiconductors NV (NASDAQ: NXPI) today announced that its CAN Signal Quality Improvement (SIC) technology has been used in the TJA146x transceiver family , and has been successfully applied to the latest platform of Changan Automobile. NXP’s CAN SIC technology effectively improves the quality of CAN signals, enabling CAN FD networks to operate in larger and more complex networks, enabling faster data transfer rates. This cost-effective technology expands the potential and flexibility of CAN FD to meet the networking challenges of next-generation vehicles. Chinese automaker Changan Automobile is the first automotive customer to use NXP’s CAN SIC technology in production.

NXP Addresses CAN FD Bandwidth Limitations with Signal Quality Improvement Technology

He Wen, deputy general manager of Changan Automotive Intelligence Research Institute, said: “In the early stage of the project, Changan and NXP’s in-vehicle network department actively cooperated to introduce CAN SIC into the ADAS system of Changan’s latest UNI-K models. The biggest challenge in the project is to Solve the interference problem caused by ringing. After repeated simulation, testing and verification, it is finally shown that CAN SIC transceiver is the most effective way to solve the ringing problem. TJA146x CAN SIC transceiver can improve the flexibility of wiring harness layout for future Upgrading to higher bandwidths such as 5Mbps paves the way. From an overall engineering perspective, communication quality and engineering efficiency have been greatly improved.”

Advantages of CAN SIC

The classic CAN network is cost-effective, stable and reliable, has the advantages of scalability and easy deployment, and can support the complex topology of the vehicle. However, the new functions of the car are constantly increasing, and the demand for data exchange is increasing, and the CAN network system must break through its own limitations. Compared to classic CAN, CAN FD technology provides higher bandwidth, increasing the transmission rate from 500 kbps to 5Mbps.

While CAN FD networks have many advantages, the technology has limited signal integrity due to “signal ringing” due to signal reflections, only 2 Mbps transfer rates can be achieved in many networks, and it is limited to the use of highly linear topologies. This means that long cable branches must be avoided in the wiring harness, and the wiring in the car becomes more complicated, which in turn increases the cost and weight of the car.

NXP’s CAN signal quality enhancement technology addresses signal integrity issues due to ringing by enhancing the CAN signal. As a result, OEMs can not only gain a higher degree of freedom in network design and ECU placement, but can also take full advantage of the additional advantages that the technology brings, such as shorter cables, lighter weight, fewer connections, and simpler network design Wait. The technology also improves the performance of CAN FD by using tighter timing and active signal enhancement, reaching transfer rates of 5 Mbps or more on multi-node networks. With the increased bandwidth, CAN FD will support a wider range of applications at a relatively low cost.

Meindert van den Beld, Vice President and General Manager of the Automotive Networks Product Line at NXP, said: “With our CAN signal quality enhancement technology, automakers are now able to deploy cost-effective CAN FD networks and have the freedom to design automotive networks as needed. Changan Auto We are very pleased to have adopted NXP’s TJA146x CAN SIC transceiver family in the new UNI-K and brought the technology directly into production.”

The TJA146x transceiver series is pin-compatible with existing transceivers and can be directly replaced. It also complies with ISO11891-2:2016 CAN FD and the new version of the CiA601-4 signal quality improvement standard, and is backward compatible with standard CAN transceivers.

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