Description
The RailClamp® series is a family of ultra low capacitance TVS arrays designed to protect high speed data interfaces. This series has been specifically designed to protect sensitive components which are connected to high-speed data and transmission lines from overvoltage caused by ESD (electrostatic discharge), CDE (Cable Discharge Events), and EFT (electrical fast transients). They are designed for use in applications where board space is at a premium. Each device requires less than 1.5mm2 of PCB area and will protect up to three high speed data lines.
The monolithic design incorporates surge rated, low capacitance steering diodes and a TVS diode in a single package. Each line has a maximum capacitance of 0.5pF to ground. The capacitance of each line is well matched for consistant signal balance. A connection to the TVS is provided for protection of an external voltage bus, such as those found in USB applications. This device is optimized for ESD protection of portable electronics. They may be used to meet the ESD immunity requirements of IEC 61000-4-2, Level 4 (±15kV air, ±8kV contact discharge).

Features
◆ ESD protection for high-speed data lines to
   IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
   IEC 61000-4-4 (EFT) 40A (5/50ns)
◆ Array of surge rated diodes with internal TVS Diode
◆ Small package saves board space
◆ Protects three I/O lines and a power line
◆ Low capacitance: 0.5pF maximum
◆ Low clamping voltage
◆ Solid-state silicon-avalanche technology

Applications
◆ USB OTG
◆ MMC Port
◆ Serial ATA
◆ Video Port
◆ SIM Port
◆ PCI Express