Bidirectional TVS diode array protects high speed interfaces from ESD

March 14, 2017 // By Nick Flaherty
Littelfuse SP3042 diode
Littelfuse has launched a series of bidirectional diode arrays to protect electronic equipment from destructive electrostatic discharges (ESD).

The SP3042 Series of discrete TVS diode arrays include robust back-to-back TVS diodes fabricated using a proprietary silicon avalanche technology that can safely absorb repetitive ESD strikes up to the maximum level specified in the IEC 61000-4-2 international standard (±30kV contact discharge) without performance degradation.

The low dynamic resistance (just 0.5Ω) allows them to respond quickly to ESD events and they provide robust ESD protection for high speed interfaces for voltages up to 30kV and current surges of up to 2A (8/20µs).

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 (0.35pF @ VR=0V, typ.) makes them suitable for protecting high-speed interfaces such as HDMI2.0, USB2.0, USB3.0 and eSATA.

Typical applications for the SP3042 Series include ESD protection for high-speed interfaces used in MIPI cameras and displays, DisplayPort1.3, eSATA, Internet of Things (IoT) modules, smartphones, external storage devices, ultrabook/notebook computers, tablets/eReaders and security modules.

“The small footprint of SP3042 Series TVS Diode Arrays allows them to protect high-speed interfaces while occupying minimal space on a printed circuit board,” said Tim Micun, global product manager/TVS Diode Arrays at Littelfuse. “Their low dynamic resistance enables them to respond quickly to prevent ESD damage.”

The bidirectional design ensures flexibility in assembly when placing parts on a printed circuit board (PCB), and the linear frequency response performance across the working voltage is an important consideration for protecting high-speed interfaces. 

The SP3042 Series TVS Diode Arrays are available in surface mount 01005-size flip chip packages in tape and reel format in quantities of 15,000.

Additional information is available on the  SP3042 Series product page

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