Gigabit Ethernet circuit protection
Circuit Protection of Ethernet-Gigabit
The data signal voltage for Gigabit Ethernet communication is 2Vp-p, and the maximum data transmission rate is 250Mbps. At these rates, the capacitance and linearity of the suppressor need to be considered. Signal lines to be protected from ESD include T +/- and R +/-.
As shown on the left, a bridge circuit is used with a bias network to achieve the required low capacitance and linearity. The diode is an industry standard and is available from a number of suppliers including Vishay. The P0080SC semiconductor discharge tube is used as a protective element. PTC fuses are common components.
In addition to the recommendations above, the Ruilon portfolio offers other solutions. For some short-distance applications, a simple P0642SA semiconductor discharge tube can be used without the need for a bridge circuit.
This solution is designed to meet Telcordia GR-1089 outdoor and indoor standard requirements.
The design scheme is patent pending, and its performance has surpassed LC-03 devices, especially at higher temperature conditions, and the cost of implementing this scheme is lower
Application warning: None.