Date: 07/10/2020

Ethernet phy chip supports 10 Mbps signal Tx upto 1.7 KM on twisted pair

One of the leading broadspectrum merchant semiconductor maker Texas Instruments launched a new Ethernet physical layer (PHY) chip DP83TD510E with ability to send 10-Mbps Ethernet signals up to 1.7 km through a single pair of twisted wires. This is lot more than 200 meters specified by IEEE 802.3cg 10BASE-T1L single-pair Ethernet specs.

By using this product design engineers in the field of industrial networking were saved from use of a multiple fieldbus protocols supported by protocol conversion through network gateways, which are complex and expensive.

DP83TD510E helps engineers to simplify network management and have improved system control and interoperability in long-distance applications including HVAC valve and actuator control, field transmitters, elevator main controls and fire alarm control panels.

To learn more on this, there is a white paper titled "Leveraging Single-Pair Ethernet in Building Automation," to learn how 10BASE-T1L Ethernet PHYs can increase connectivity in building automation designs.

TI sugggest, when upgrading to single-pair Ethernet from two-wire fieldbus technologies, such as 4- to 20-Ma current loops, designers can further streamline network design and reduce installation costs by reusing existing two-wire fieldbus infrastructure for data and power transmission.

The DP83TD510E is designed for use in intrinsically safe Ethernet advanced physical layer (APL) systems.

Another intersting feature is "By supporting external termination resistors, the DP83TD510E can reduce inrush current and maintain lower operating temperatures when used in long-distance process automation applications, such as field transmitters."

In addition to helping designers more easily meet their intrinsic safety requirements, the DP83TD510E's ultra-low power consumption of less than 45 Mw at 1 V p2p provides additional power margin that can be reallocated to other critical circuits for increased system performance.