Charged EVs | ROHM’s new ESD diodes protect 10+ Gbps automotive interfaces

ROHM Semiconductor has introduced the RESDxVx series, ESD protection diodes targeting high-speed interfaces operating above 10 Gbps. The devices achieve terminal capacitance of 0.24 pF (bidirectional) and 0.48 pF (unidirectional) alongside a dynamic resistance of 0.28 Ω—a combination that addresses the core design challenge in this application.

At data rates above 10 Gbps, even small amounts of parasitic capacitance distort signal waveforms. Reducing capacitance has traditionally come at the cost of higher dynamic resistance, which weakens the clamping response and leaves downstream ICs more vulnerable to overstress. The RESDxVx series claims to break that trade-off, with ROHM reporting a clamping voltage approximately 40% lower than conventional competing products at equivalent capacitance levels.

The automotive-qualified variants—the RESD3V3BASAFH, RESD5V0BASAFH, RESD3V3UASAFH, and RESD5V0UASAFH, all in DFN1006-2W packages—carry AEC-Q101 certification. Target automotive applications include ADAS and autonomous driving cameras, surround view systems, and ECUs using SerDes communication. Non-automotive variants in the DSN0603-2J package target AI servers, data center switches, 5G/6G base stations, and consumer interfaces including USB4, Thunderbolt 4, PCIe, HDMI, DisplayPort and MIPI D-PHY/C-PHY.

Source: ROHM Semiconductor