1 Abstract

The IEEE 802.3cg 10BASE-T1L specification unlocks the potential for exciting new opportunities for Ethernet communications in long-distance applications. By supporting 10-Mbps full-duplex communications up to a distance of 1,000 meters through a single pair of twisted wires, the standard makes the impossible possible in terms of utilizing Ethernet for two-wire long-distance communications. Single-pair Ethernet PHYs such as the DP83TD510E help designers more easily implement this standard while also extending cable reach beyond the standards specifications. The DP83TD510E surpasses the 1-km at 1.0 Vpp and 2.4 Vpp requirement of the standard and is capable of transmitting signals up to 2,000 meters.

This additional cable length helps designers extend the reach of industrial communications without increasing system weight or cabling costs. The extended supported length also improves the longevity of shorter cables, allowing for more cable degradation without sacrificing transmission quality. External components, layout and cable types play an important in achieving the long cable reach. This application note discusses the features of the DP83TD510E and key specifications of external components to achieve the maximum cable reach as well as cable specifications to consider for these long reach applications.