Replacing up to nine discrete components, the RClamp3304N uses exclusive Semtech process technology to achieve full functionality with great clamping performance in a small device. This design, combined with the company’s new leadless SLP packaging, results in a footprint measuring only 2.6 mm x 2.6 mm with an ultra-low 0.6 mm profile.

The device is the newest member of Semtech’s RailClamp® family of low-capacitance TVS arrays that protect high-speed data and input/output interfaces from over-voltage situations. The RClamp3304N protects up to four low-voltage interfaces against electro-static discharge (ESD), cable discharge events and lightning. It offers protection levels that exceed IEC 61000-4-2 ESD specifications.  The broad range of applications for this device include integrated connectors, USB ports, Gigabit Ethernet, T1/E1, and T3/E3 interfaces in base stations, central office equipment, routers, hubs, set-top boxes, and servers, notebook and desktop computers.

 “The RClamp3304N highlights Semtech’s advanced technology and the real-world size and protection benefits it provides,” said Tom Dugan, Semtech's Director of Protection Products. “The small size and exceptional functionality provided by the RClamp3304N enables designers to provide comprehensive protection for their systems without sacrificing other functionality due to lack of board space.”

The device has an extremely low clamping voltage for lightning induced peak pulse currents of up to 25 amps providing superior protection for sensitive ICs in high-threat environments. The superior clamping voltage is due in part to a large center tab on the device that serves as a low inductance path to ground for shunting electrical transients away from the protected device.

The TVS diodes in the RClamp3304N are constructed using Semtech’s proprietary Enhanced Punch-through Diode (EPD) process technology that provides low standoff voltages and enables very low leakage currents and capacitance over traditional silicon avalanche diode processes. Its low capacitance of less than 5pF makes it well suited for high-speed interfaces.

The lead-free design of the device complies with the European Union’s Restriction on Hazardous Substances in Electrical and Electronic Equipment (RoHS) directive to meet worldwide environmental and regulatory requirements.

Key Features of the RClamp3304N

• Low 3.3 volt operating voltage
• Capacitance of less than 5pF for high-speed interfaces
• Transient protection for high-speed data lines to IEC 61000-4-2 for ESD, IEC 61000-4-4 for EFT and IEC 61000-4-5 for lightning
• ESD protection: 15kV (contact) 25kV (air) per IEC 61000-4-2
• Lightning protection to 25A (8/20us)
• 77% Smaller than industry standard solutions (i.e. SO-8)
• Protects up to four I/O lines and power line
• Lead-free and RoHS/WEEE compliant
• Low leakage current