First common-mode choke for 1000BASE-T1 networking

April 11, 2019 //By Nick Flaherty
First common-mode choke for 1000BASE-T1 networking
Murata is sampling the world’s first common mode choke coil designed to be fully compatible with the automotive high-speed (1Gbps) LAN standard, 1000BASE-T1.

The DLW32MH101XT2 is the industry’s smallest common mode choke coil for 1000BASE-T1 applications, measuring 3.2 x 2.5 mm x 2.5 mm.

Vehicle technology has rapidly evolved in recent years to include advanced driver assistance systems (ADAS) and sophisticated in-vehicle infotainment (IVI) while moving ever closer to fully autonomous operation. As a result, vehicle communication busses carry increased-bandwidth data from higher resolution image sensors and more complex electronic control units (ECUs). To support this traffic, the 1000BASE-T1 standard is expected to become widespread in the future.

The DLW32MH101XT2 supports the S-Parameter characteristics specified by the OPEN alliance automotive network standard organization and meets the characteristics for noise filters in 1000BASE-T1 communications. Through the application of Murata’s winding technology and using a unique winding structure, the device is the smallest currently available, It offers an inductance value of 100 uH and a typical DC resistance of 2.6 Ohm and is rated for currents up to 100 mA.

Compliant with the AEC-Q200 automotive standard, the common mode choke coil offers an extended temperature range of -40 C to +125 C.


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