Bi-directional TVS diode arrays protect high-speed interfaces

18th April 2017
Caroline Hayes

Protection for high-speed interfaces like HDMI, USB2.0, USB3.0 and eSATA, is provided by the SP3042 series of bi-directional discrete TVS diode arrays, from Littelfuse. (PCIM Europe 2017 Stand 7-335)

The SPA Diodes are designed to protect electronic equipment from ESD (electrostatic discharges). They include TVS diodes, fabricated using a proprietary silicon avalanche technology that can absorb repetitive ESD strikes up to the maximum level specified in the IEC 61000-4-2 international standard (±30kV contact discharge) without performance degradation, says the company. The back-to-back configuration provides symmetrical ESD protection for data lines when AC signals are present in a space-efficient 01005 footprint. The series’ low loading capacitance of 0.35pF at VR of 0V, typical, makes them suitable for protecting establishing and emerging high-speed interfaces, such as HDMI2.0, USB2.0, USB3.0 and eSATA.

Typical applications include ESD protection for high-speed interfaces used in MIPI cameras and displays, DisplayPort1.3, eSATA, IoT modules, smartphones, external storage devices, ultrabook or notebook computers, tablets and e-readers and security modules.

The small footprint enables high-speed interfaces to be protected while occupying minimal space on a PCB. The bi-directional design ensures flexibility in assembly when placing parts on a PCB, adds the company.

The diode arrays provide linear frequency response performance across the working voltage, which is an important consideration for protecting high-speed interfaces. Dynamic resistance is just 0.5Ω, which allows the diodes to respond quickly to ESD events. They provide ESD protection for voltages up to 30kV and current surges of up to 2.0A (8.0 or 20µs).

The TVS diode arrays are available in surface mount 01005-size flip chip packages in tape and reel format in quantities of 15,000.

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