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Silicon ESD devices offer low-capacitance sol'n

Posted: 14 Feb 2012     Print Version  Bookmark and Share

Keywords:esd protection  silicon ESD  capacitance 

TE Circuit Protection offers a family of eight single-channel and multi-channel silicon ESD (SESD) protection devices that boast the lowest capacitance (bi-directional: 0.10pF typical; uni-directional: 0.20pF typical), highest ESD protection (20kV air and contact discharge) and smallest size (multi-channel: smallest flow-through form-factor and 0.31mm height) packages.

The devices' ultra-low-capacitance results in the industry's lowest insertion loss, which is essential for maintaining signal integrity in ultra-high-speed applications, according to the company. The devices help protect against damage caused by electrostatic discharge (ESD), surge and cable discharge events. The multi-channel devices also feature a flow-through design package that allows for matched impedance of PCB trace routing, which is essential for maintaining high-speed signal integrity. The ultra-low-capacitance, small size and high ESD kV rating of the SESD devices are targeted at smart phones, HDTVs and similar consumer, auto and other markets' products using the highest-speed interfaces such as USB 3.0/2.0, HDMI, eSATA, DisplayPort, and Thunderbolt, according to the company.

The single- and multi-channel SESD devices also feature a 20kV contact and air discharge rating, exceeding IEC61000-4-2's 8kV industry standard. In the event of a high voltage ESD strike, this high kV rating helps minimise the risk of the ESD device failing short and permanently disabling the port, or open, exposing the downstream chipset to damage caused by another ESD strike. This capability helps reduce customer complaints and warranty repair costs.

The single-channel devices are available in 0201-sized XDFN small footprint (0.6mm x 0.3mm x 0.31mm) and 0402-sized XDFN (1.0mm x 0.6mm x 0.38mm) packages. The multi-channel SESD arrays (two-, four- and six-channel options) feature a package height as low as 0.31mm—resulting in up to a 50 per cent lower profile than comparable devices. The SESD devices' lower profile allows for placement closer to the edge of the PCB, or in-between boards and connectors, facilitating design flexibility.

Additionally, one miniature four-channel SESD array can be used in a smaller board area than four 0201 devices, resulting in board space, assembly cost and device cost savings. As the smallest 4- and 6-channel flow-through arrays on the market, these devices also ease routing when used with applications employing miniature-size connectors, such as HDMI Type-D, mini DisplayPort, Thunderbolt and USB 3.0 Micro-B, according to the company.

The devices are available now at unit pricing starting at Rs.8.16 ($0.16) for 10,000 unit quantities. Delivery is 12 weeks ARO.





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