USB2.0-compatible low profile chip common mode choke coils
9 April 2003
Circuit & System Protection
Murata has introduced a new series of chip common mode choke coils. The DLP11 series provide high levels of EMI noise suppression in high-speed differential mode signal transmission lines such as USB2.0. They are compact, low profile, and are said to be the smallest USB2.0 common mode choke coils available.
Murata thin film and ferrite material technologies have produced choke coils that handle high-speed data transmission in a compact and low profile volume of 1,25 x 1,0 x 0,82 mm. With an electrode pitch of 0,55 mm, they contribute to high density mounting in compact designs like mobile equipment. Moreover, with a magnetic coupling factor of 0,98 or more, the differential mode impedance that may cause signal waveform distortion in the signal pass band is reduced to low values. As a result, common mode noise is effectively removed without influencing high-speed signal waveforms.
A lineup of four values is available, with common mode impedance values of 90, 120, 160 or 200 Ω (at 100 MHz).
With data processing speeds in personal computers and their peripherals becoming faster and faster, high-speed differential signals such as USB2.0, IEEE1394, and LVDS serving as interfaces between computers and peripherals have become widespread. A common mode choke coil that effectively removes noise without influencing signal waveforms is useful as noise suppression in high-speed differential mode signal transmission lines.
Applications are for noise suppression in high speed differential signal lines of compact, mobile equipment such as digital still cameras, video cameras, mobile phones, PDAs, and notebook computers; noise suppression in USB2.0 (High-Speed) D+/D-lines; noise suppression in IEEE1394 TPA± TPB± lines; noise suppression in clock and data lines such as LVDS/DVI (TMDS).
For more information contact Avnet Kopp, 011 809 6100, [email protected], www.avnet.co.za
Further reading:
Clearing the Static: Staying grounded: Ensuring effective ESD control
Actum Electronics
Circuit & System Protection
To maintain reliable electrostatic discharge control, regular testing and accurate measurement are essential, with grounding products and ESD testing equipment being vital.
Read more...
Clearing the Static: ESD component safety in storage and transportation
Actum Electronics
Circuit & System Protection
Conductive containers create a Faraday cage effect, safely channelling electrostatic charges away from the components inside.
Read more...
Clearing the Static: Conductive foot, heel and shoe grounders
Actum Electronics
Circuit & System Protection
Conductive foot, heel and shoe grounders are used in electrostatic discharge protected areas to provide a path to ground for static electricity.
Read more...
LED driver for industrial power supply indication
Altron Arrow
Editor's Choice Circuit & System Protection
A simple and small solution for driving an LED to provide visual feedback in the presence/absence of a system’s power using a chip not originally designed for this purpose.
Read more...
Clearing the Static: Cleaning in an ESD-protected area
Actum Electronics
Circuit & System Protection
Cleaning in a protected electrostatic discharge area is a critical task to maintain the integrity of sensitive electronic components and prevent damage caused by static electricity.
Read more...
Clearing the Static: Key principles of ESD control in electronics manufacturing
Actum Electronics
Circuit & System Protection
Effectively managing electrostatic discharge is essential in electronics manufacturing to ensure not only product reliability, but also worker safety.
Read more...
Clearing the Static: Three steps for a dry ESD packaging system
Actum Electronics
Circuit & System Protection
For optimal storage, it’s essential to complete the dry-packaging system by adding Desiccant Packs and Humidity Indicator Cards.
Read more...
Ensuring safety with earth leakage protection
NewElec Pretoria
Circuit & System Protection
Earth leakage protection helps mitigate the risks of electric shocks, fires, and equipment damage by swiftly identifying faults and disconnecting the power supply, thus safeguarding both human lives and machinery.
Read more...
Suppressing EMI with filters
Vepac Electronics
Circuit & System Protection
EMI/RFI filters play an important role in reducing the high-frequency noise that is generated by various electrical and electronic devices.
Read more...
Patch attenuates like a shielding cabinet
Würth Elektronik eiSos
Circuit & System Protection
Würth Elektronik has launched its hybrid WE-EMIP EMI absorber sheet, a convenient solution for reducing electromagnetic interference by up to 40 dB.
Read more...
printer friendly version