Integrated EMI filter for BroadR-Reach automotive Ethernet connectivity

November 26, 2015 // By Graham Prophet
STMicroelectronics’ EMIF02-01OABRY is a highly integrated solution designed to suppress EMI noise in automotive applications employing BroadR-Reach interfaces. This EMI-suppressing low-pass filter includes 15kV ISO 10605 surge protection and is AEC-Q101 qualified.

Until now, common practice has been to use discrete components to design EMI filters that are compatible with the BroadR-Reach specification. Because there may be a large dispersion between components, these discrete networks’ performance must be fine- tuned at significant time and cost.

The EMIF02-01OABRY solves this issue by providing an already application-validated integrated solution, making the end applications smaller and faster to design. Within the Automotive temperature range of -40°C to 125°C, the EMI filter attenuation profile is fully compliant with BroadR-Reach requirements, with a return loss of -20 dB at 60 MHz and component matching of 1% between line 1 and 2.

Features include: Compliant with the IEC 61000-4-2, ISO 10605, and ISO 7637-3 automotive standards and; 3 x 3mm² wettable-flank QFN package, facilitating optical inspection of the solder joints.

BroadR-Reach is an automotive Ethernet standard defined by the OPEN Alliance ( that allows multiple in-vehicle applications such as Advanced Driver Assistance and infotainment systems to access information simultaneously over a single unshielded twisted pair cable, reducing cabling

cost and weight as cars become ever more connected. BroadR-Reach is a registered trademark of Broadcom Corporation.

EMIF02-01OABRY is priced at $0.48 (1000).

ST Microelectronics;