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Protection device tailored for DSL equipment

Posted: 08 Mar 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Gina Roos?

Semtech Corp. has developed a two-line protection device with a wide operating voltage range and low clamping voltage specifically for ADSL and other WAN equipment. The device meets IEC standards for ESD, EFT and lightning protection.

With a high surge capability, the RClamp7002M protection device helps shield sensitive circuits in central office (CO) equipment or customer premise equipment from power transients caused by ESD, cable discharge events, EFT or lightning.

Designed in collaboration with a major DSL chipset company to ensure that the protection device meets the needs of next-generation devices, the RClamp7002M offers an operating voltage range from 3.3V to 70V, with the device connecting to the positive power supply rail (VCC) and the ground to match the system voltage within that range. With this wide operating range, the device can be designed into a CO system that uses -48V power, said the company.

The RClamp7002M maintains a low clamping voltage through the use of surge rated, low capacitance steering diodes, each of which features a large area junction. Key features include a low clamping voltage of 10V (IPP= 40A), a low capacitance of 10pF, and a 1,000W peak pulse power (8/20s).

The RClamp7002M meets ESD (IEC 61000-4-2) 15kV (air), 8kV (contact); EFT (IEC 61000-4-4) 40A (5/50ns); and lightning (IEC 61000-4-5) 1kV, 24A (1.2/50s) standards. The device is lead free and compliant to the EU's RoHS directive.

In addition, the RClamp7002M helps simply board layout by locating the incoming signals at one end of the device and the outgoing signals at the other end of the device, eliminating the need to route lines, said the company.

Supplied in a small MSOP-10L package, the RClamp7002M is priced at 76 cents each in quantities of 10,000. The ordering code for the part is RClamp7002M.TBT. Evaluation kits and samples are available.

- Gina Roos

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