CAN FD transceivers offer high EMC performance, short loop delay

April 06, 2016 // By Christoph Hammerschmidt
Two new CAN transceiver families from Texas Instruments offer features like high bus-fault protection, fast CAN FD speeds and, according to TI, the industry shortest loop delay – an important feature for complex CAN networks with many nodes and long wires.

Key features of the new CAN transceivers include compliance with EMC standards from U.S. and European automotive manufacturers and from international organizations, high bus-fault and electrostatic discharge (ESD) protection as well as high bandwidth and flexibility.

 

The 16 Automotive Electronics Council (AEC) Q100-qualified devices within the new product family meet EMC requirements for automobile manufacturers in the United States (Society of Automotive Engineers [SAE] J2962) and Europe (Ingenieurbüro für Industrielle Elektrotechnik [IBEE]-Zwickau). The eight industrial devices meet the requirements of the Comité International Spécial des Perturbations Radioélectriques (CISPR) 22, International Electrotechnical Commission (IEC) 61000-4-6 up to 10 V, IEC 61000-4-4 Criteria A to ±4 kV, and IEC 61000-4-3 from 80 MHz to 2.7 GHz up to 100 V/meter.

 

High bus-fault protection up to 70 V exceeds 12-, 24- and 48-V battery requirements, in addition to protecting against 24-V DC industrial power supplies. This protects CAN bus pins against short-to-DC voltages. ESD protection up to ±15 kV eliminates the need for external transient voltage suppression (TVS) diodes, saving board space and cost.

A fast CAN FD speed of up to 5 Mbps increases the communication speed and data-transfer capability between electronic control units and nodes on the CAN network. The industry’s shortest loop delay of 175 ns enables more margin in the system design, longer networks and more nodes on the CAN bus.

The transceivers also eliminate the need for an external noise-suppressant common-mode choke component, thereby reducing bill-of-materials cost and space in automotive and industrial designs.

An evaluation module (part designation TCAN1042DEVM) enables designers to evaluate the performance of the TCAN1042 and TCAN1051 families.

The TCAN1042 and TCAN1051 families of 24 eight-pin CAN transceivers are available today in 1,000-unit quantities starting at US$0.48. TCAN1042 devices contain a standby mode with a bus wake-up feature and variations for fault protection, bit rate and level-shifting. TCAN1051 devices include a silent mode and variations for fault protection, bit rate and