Die Technologie – Produkte

Single Pair Ethernet
Semiconductor Products



  • Semiconductor products provide the electrical interface to SPE connectors and cables. They implement the physical layer of the ISO Communications reference model. They prepare the bits that make up an Ethernet frame so they can be placed on a single balanced pair of wires that take them to other network participants.
  • SPE semiconductor products conform to standards from the Institute of Electrical and Electronic Engineers (IEEE) that define how Ethernet works. There are several standards that define networks running at different speeds.

Types of Semiconductor Products

  • Semiconductors products that implement SPE can perform several functions and this web page includes pointers to the different types of products. Different suppliers have product lines that work at various speeds and integrate different functions. They interoperate with each other because they implement the same standards.
  • The current SPE speed grades are:
    • 10BASE-T1S: Short-reach 10 Mbits/s, multidrop and point-to-point connections
    • 10BASE-T1L: Long-reach 10 Mbits/s, point-to-point connections
    • 100BASE-T1: 100 Mbit/s, point-to-point
    • 1000BASE-T1: 1000 Mbit/s, point-point

SPE SA Semiconductor Suppliers


They convert data from a Media Independent Interface (MII) to the electrical signals that are placed on connectors and wires to be transported to the other participants in the network. Some also support Reduced MII (RMII). They are attached to microcontrollers, microprocessors and switches that have a built-in Media Access Controller. The MAC takes an Ethernet frame and prepares it for conversion to the electrical signals to go on a wire.



Include MAC and a PHY in a single chip. These devices generally have a Serial Peripheral Interface (SPI) that connects to various microcontrollers and microprocessors that don’t have a built-in MAC. These tend to be simpler microcontrollers and other products that don’t have internal Ethernet interfaces.

Ethernet Switches

These devices have multiple Ethernet ports and include the circuits necessary to move data from one port to another. They often integrate PHYs, but can also connect to external PHYs over a Media Independent Interface (MII). A single switch can connect to a different speed grade on each port and automatically manages the conversion from one speed to another.