Common Mode Filter suppresses EMI on DisplayPort interfaces.

Press Release Summary:

Measuring 1.25 x 1.0 x 0.6 mm, TCM1210U-500-2P wide-band thin-film common mode filter suppresses noise on DisplayPort connections for signal transmission between computers or audiovisual equipment and display monitors. DisplayPort link uses up to 4 lines, each rated for 2.7 Gbit/sec, resulting in total transfer rate of 10.8 Gbit/sec. Unit features 8.0 GHz cutoff frequency, 50 W common mode impedance at 100 MHz, 100 mA rated current, and 10 V rated voltage.

Original Press Release:

TDK Launches Industry's First Thin-Film Common Mode Filter for DisplayPort

Tokyo, July 15, 2008 - TDK Corporation announced today that it has developed a wide-band thin-film common mode filter for EMI suppression on DisplayPort interfaces, an industry first. The new product which carries the designation TCM1210U-500-2P will be available from this month.

The new filter measures 1.25 mm (L) x 1.0 mm (W) x 0.6 mm (T) in size and is designed specifically to suppress noise on DisplayPort connections, a new standard for signal transmission between computers or audiovisual equipment and display monitors at speeds that exceed even HDMI (2.25 Gbit/s). A DisplayPort link uses up to four lines, each rated for 2.7 Gbit/s, resulting in a total transfer rate of 10.8 Gbit/s. The demand for EMI suppression components in this area is expected to grow significantly in the near future.

In order to create a product to meet this demand, TDK applied its industry-leading expertise in thin-film magnetic head technology (including original fine pattern conductor formation and film formation technologies). With a cutoff frequency of 8.0 GHz, the rating of the new filter is 2 GHz higher than that of the existing thin-film common mode filter for HDMI (TCM1210H-900-2P). As a result, the filter offers effective noise control without degrading the outstanding transmission characteristics of high-speed differential transmission line signals.

Main Applications
EMI countermeasures on high-speed data transmission lines in notebook computers, audiovisual equipment, and other electronic devices.

Main Features
1. Industry's first common mode filter for DisplayPort interfaces
2. Cutoff frequency raised to 8 GHz to support high-speed data transmission

Main Characteristics
Product designation: TCM1210U-500-2P
Common mode impedance (ohms) [at 100 MHz] (typ.): 50
Rated current: 100mA
Rated voltage: 10V

Production and Sales Plan
Production location: Japan
Start of sample shipping: July 2008

o DisplayPort connection standard announced by VESA (Video Electronics Standards Association) in May 2005 and approved in May 2006.
o As of July 1, 2008, according to TDK investigations.

TDK Corporation
TDK Corporation is a leading global electronics company based in Japan. It was established in 1935 to commercialize "ferrite," a key material in electronics and magnetics. TDK's current product line includes ferrite materials, electronic components and ICs, wireless computer networking products, magnetic heads for HDD, digital recording hardware and advanced digital recording media. For more information, please visit

TDK Corporation
Mr. Osuga
Corporate Communications
Tel: +81-3-5201-7102

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