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Electrical overstress damage of TI 1394 PHY devices

Posted: 02 Jun 2009 ?? ?Print Version ?Bookmark and Share

Keywords:PHY devices? connector system? electrical overstress?

All 1394 PHY devices are susceptible to electrical overstress damage when exposed to a combination of high-voltage cable power and a faulty cable or connector system that allows data (TPx) and cable power (Vp) connections to engage before the cable ground (Vg) connection. This set of circumstances is known as a "late Vg" event. This application note provides information on how to recognize a 1394 PHY device that has been damaged by a late Vg event, an explanation of how the damage occurs and suggestions on both decreasing the frequency of late Vg events in a system and protecting 1394 PHY devices from damage due to late Vg events.

View the PDF document for more information.





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