New TVS Diodes with Low Capacitance for High-Speed Interface ICs and ESD Sensitive Network Components

TDK Corporation has extended its range of TVS diodes characterized by their extremely low capacitance values for bidirectional overvoltage protection to include the ULC series. The new TVS diodes are designed for a maximum operating voltage of 3.3 V. The SD01005SL-ULC101 (B74111U0033M060) type has a minimum capacitance of ~0.5 pF while  the SD0201SL-ULC101 (B74121U0033M060) type has minimum capacitance of ~0.6 pF, both at 1 MHz. The diodes are well suited for the reliable ESD protection of high-speed interface ICs and data lines such as USB 3.1, USB 3.2, HDMI, FireWire and Thunderbolt due to their parasitic capacitances and clamping voltage. Its target applications include smartphones, notebooks, tablets, wearables and ESD sensitive network components.

The ULC products offer an extremely low clamping voltage of ~3.8 V at a peak pulse current of 8 A or 16 A at ~5 V and a breakdown voltage of 6.3 V. Its features include very short response times and the extremely low leakage current of ~1 nA at 3.3 V. They are designed in accordance with IEC 61000-4-2 for an ESD contact discharge of up to 15 kV. The dimensions of the diodes in the Wafer-Level Chip Scale Package (WL-CSP) are  400 x 200 µm (WL-CSP01005) or 600 x 300 µm (WL-CSP0201) with a height of 100 µm in the 01005 size or 150 µm in the 0201 size. Despite their extremely small size, the components are designed for a high surge current load of up to 7 A according to IEC 61000-4-5 (8/20 µs).

Features and benefits of the TVS Diodes

• Extremely low capacitance of ~0.5 pF or ~0.6 pF at 1 MHz

• Clamping voltage of ~3.8 V at a peak pulse current of 8 A

• Size: 400 x 200 µm (WL-CSP01005) or 600 x 300 µm

• ESD protection to IEC 61000-4-2 up to 15 kV contact discharge

• High surge current loads of up to 7 A according to IEC 61000-4-5 (8/20 µs)

Applications of TVS Diodes

• High-speed interface ICs and data lines such as USB 3.1, USB 3.2, HDMI, FireWire, Thunderbolt

• Smartphones, laptops, tablets and wearables as well as ESD sensitive network components