Protecting data lines

03 August 2009

Industry’s first common mode choke EMI filter with integrated ESD protection for high-speed data lines
Industry’s first common mode choke EMI filter with integrated ESD protection for high-speed data lines

Common mode choke EMI filter with integrated ESD protection for high-speed data lines.

The industry’s first integrated common mode choke and electrostatic discharge (ESD) protection IC for high-speed data line applications has been unveiled by ON Semiconductor.

The NUC2401MN combines high bandwidth differential filtering, solid common mode stop band attenuation and ESD protection. These combined features make this solution better than typical Electro-Magnetic Interference (EMI) filters and discrete alternatives while helping to lower component count. It is suitable for applications based on high-speed differential data lines including USB 2.0, IEEE1394, LVDS, MIPI and MDDI.

“ON Semiconductor has established a reputation as a leading provider in high performance EMI filter products and the NUC2401 is our newest product to continue this trend,” said Gary Straker, general manager of ON Semiconductor’s protection and control product group. “This device is the first of many in a comprehensive portfolio that will help our customers in their efforts to integrate high bandwidth interfaces into handsets that will ultimately be capable of delivering the latest high bandwidth content from cellular service providers.”

Integrating the equivalent of five discrete components into a DFN package measuring just 2.0 mm x 2.2 mm, the NUC2401MN combines common mode EMI filtering with ESD protection to ±12 kV - in accordance with the IEC61000-4-2 industry standard for contact discharge. Machine Model (MM) and Human Body Model (HBM) ESD ratings are 1.6 kV and 16 kV respectively. The device is rated to MSL 1 and will operate at temperatures from -40ºC to 85ºC.

Because the NUC2401MN is an integrated solution, it helps reduce parasitic inductance, resulting in more ideal common mode filtering. The cutoff frequency for common mode noise reduction is 40 MHz and typical common mode impedance at 100 MHz and 500 MHz is 200 Ω and 500 Ω respectively. The device also offers the industry’s lowest maximum clamp voltage – 10 V at a peak current of 5 A - to ensure superior ESD protection. Maximum peak pulse current rating is 19 A.

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