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Murata Developed Industry’s Smallest Automotive Common Mode Choke for High-Speed LAN Standard Up to 1Gbps

18.4.2019
Reading Time: 2 mins read
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Source: Murata news

Murata Manufacturing Co., Ltd.  has developed the DLW32MH101XT2, which is the world’s first*1 common mode choke coil designed to be fully compatible with the automotive high-speed LAN standard 1000BASE-T1*2 as well as being the industry’s smallest*3 common mode choke coil, and has begun sample shipment and mass production.

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1.Background of Development

In the automotive industry in recent years, in order to improve the functions of automobiles such as automatic operation and ADAS*4, the image resolution of automotive cameras that operate as sensors has been further improved and the speeding up of automotive networks connecting various ECUs*5 has been accelerated. In future, it is expected that the 1000BASE-T1 transmission standard, which is faster than the currently established 100BASE-T1*6 standard, will become widespread.

This product has been made more compact using Murata’s winding technology, and realizes the characteristics and reliability required of noise filters used in 1000BASE-T1 communication circuits.

2.Features of the Product

The DLW32MH101XT2 supports the S-Parameter characteristics*7 specified by the OPEN Alliance*8 automotive network standard organization. The details are as follows.

  • The world’s first common mode choke coil compatible with 1000BASE-T1 (up to 1Gbps)
  • Fully compatible with the S-Parameter specified by the OPEN Alliance
  • Operating temperature from -40℃ to 125℃
  • The industry’s smallest size, measuring 3.2mm x 2.5mm, realized using a unique winding structure

3.Future Development

Murata has begun mass production and sample shipment of this product with a view to the future introduction of automotive devices supporting 1000BASE-T1 in 2019.

From now on, the demand for faster automotive networks will increase in line with the greater functionality and use of electronics in automobiles. Murata will continue develop a variety of products that meet the needs of our customers while watching the spread of high-speed networks exceeding 1000BASE-T1 (multi-gigabit).

 

*1:Figures researched by Murata Manufacturing as of December 2018
*2:Automotive communication standard enabling transmission at 1Gbps
*3:The industry’s smallest common-mode choke coil according to research by Murata Manufacturing as of December 2018
*4:Abbreviation of Advanced Driving Assistance System
*5:Abbreviation of Electronic Control Unit used in automobiles
*6:An automotive communication standard enabling data transmission at 100Mbps
*7:Abbreviation of scattering parameter representing the circuit characteristics based on the degree of reflection and transmission of waves when the AC signal passing through a circuit is viewed as a wave
*8:An organization established for the purpose of promoting the large-scale implementation of Ethernet-based automotive networks using unshielded single twisted pair cables as a standard in automotive applications

 

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