ROHM has developed the RESDxVx series of electrostatic discharge protection diodes for high-speed data communication interfaces exceeding 10 Gbps, targeting industrial infrastructure, consumer electronics, and automotive systems.
The new series is designed to combine ultra-low capacitance with low dynamic resistance, addressing one of the harder compromises in high-speed interface protection. As transmission speeds rise, even small levels of parasitic capacitance can distort signal waveforms, while lower capacitance can make strong IC protection more difficult to achieve.
ROHM said the RESDxVx devices achieve terminal capacitance of 0.24 pF for bidirectional products and 0.48 pF for unidirectional products, while reducing dynamic resistance to 0.28 Ω. According to the company, that combination lowers clamping voltage by approximately 40% compared with conventional products, improving IC protection while preserving signal quality.
The devices are intended for systems using interfaces such as USB4, USB 3.x, Thunderbolt 4, HDMI, DisplayPort, PCI Express, LVDS, MIPI D-PHY/C-PHY, automotive SerDes, and automotive Ethernet. Higher bandwidth, smaller board layouts, and stricter system-level ESD requirements are increasingly arriving together in the same designs.
Industrial applications include AI servers, data centres, routers, optical transceivers, 5G and 6G-compatible base stations, factory automation cameras, and other high-speed communication equipment. Consumer use cases include notebook PCs, servers, USB dongles, smartphones, tablets, gaming consoles, AV equipment, and communication antennas.
Automotive electronics are also covered by the launch. The RESDxVxBASAFH and RESDxVxUASAFH devices, supplied in the DFN1006-2W package, are AEC-Q101 qualified for use in ADAS cameras, autonomous driving cameras, surround-view and rear-view systems, infotainment systems, body control ECUs, and head units using high-speed vehicle communications.
Miniaturised electronics, faster interfaces, and denser system architectures have reduced the tolerance margin available to ICs under electrical overstress. External ESD protection devices therefore need to sit close to connectors and exposed interfaces without adding enough capacitance to compromise signal integrity.
The RESDxVx series sits in that narrowing design space, where capacitance, clamping voltage, leakage, dynamic resistance, and package footprint all have to be balanced at board level. As high-speed links spread deeper into vehicles, factories, and computing infrastructure, protection components are becoming a more active part of interface design rather than a late-stage add-on.
ROHM said it will continue expanding its line-up of low-capacitance ESD protection and TVS diodes as AI servers, communication infrastructure, and autonomous driving systems increase demand for high-speed, high-reliability electronics. Further product details are available from the ROHM ESD protection diode range.
