Industrial Electronics

Low-capacitance TVS diodes protect high-speed data lines

11 March 2022

New four-channel, low capacitance (0.2 pF) transient voltage suppressor (TVS) diode arrays from Littelfuse Inc. are engineered to deliver extremely low breakdown/turn-on voltages, making them ideal protectors of high-speed data lines with low voltage (-0.3 V to 0.3 V).

Without performance degradation, they can safely absorb repetitive electrostatic discharge strikes above the maximum level specified in IEC 61000-4-2 international standard (Level 4, ±8 kV contact discharge). The SPxxR6 TVS diode arrays are ideal for use in a range of data communications interfaces for consumerSource: Littelfuse Inc.Source: Littelfuse Inc. electronics, including USB 3.2 and 4.0, Thunderbolt 3.0 and 4.0, and PCI Express 6.0.

As baseband chipsets become smaller and more complex, these leading-edge semiconductors also are more susceptible to damage caused by overvoltage conditions. Most very high-speed signal interfaces operate at low voltage, nominally 0.3 V or less. Higher voltages can result in damage to the attached interface.

The lower break down (diode turn-on) voltages of the SP33R6 series help protect the interface against low voltage transient spikes that can damage electronic systems. These devices will protect interfaces as small as 13 nm from voltages above 3.3 V, resulting in faster protection and providing lower clamp and breakdown voltage by using avalanche diode technology.

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