onsemi NCN26010 Ethernet controller

The NCN26010 device is an IEEE 802.3cg compliant Ethernet Transceiver including a Media Access Controller (MAC), a PLCA Reconciliation Sublayer (RS) and a 10BASE−T1S PHY designed for industrial multi−drop Ethernet. It provides all physical layer functions needed to transmit and receive data over a single unshielded twisted pair. NCN26010 communicates to host MCUs via Open Alliance MACPHY SPI protocol.

Features

• Enhanced Noise Immunity Mode
  • ENI extends the noise immunity to values well above the IEEE T1S standard
  • Allows the NCN26010 to withstand worst-case DPI and BCI immunity tests
  • Significantly improves the network reach when enabled, almost 2X better than competition
  • Unique to NCN26010
• Lowest Line Pin Capacitance
  • Best-in-class line pin capacitance allows for the highest number of nodes per segment.
  • The NCN26010 supports up to 40 nodes on a 25-meter segment, well above the IEEE minimum standard
  • Lowers cabling, connector, and installation costs
• Collision Detection Masking
  • Masking detected collisions allows operation in noisy conditions
  • Prevents false collision detection in high-noise environments
  • When used in conjunction with ENI, the NCNS26010 has unparalleled noise tolerance
• PLCA Precedence Mode
  • Lower PLCA ID's get precedence over higher ones
  • Provides arbitration similar to CAN: The Coordinator (i.e., the head node) sends a new beacon once any station transmits
  • Unique to NCN26010
• Physical Layer collision avoidance PLCA
  • Allows higher throughput in multi-drop topologies
• Two Configurable Digital Outputs that can Drive Low Current LEDs
  • Supports systems where up to two LEDs can provide status indicators
• Open Alliance Compatible SPI Interface
  • Conforms to Open Alliance TC6 specs for Configuration and Data Frames to Host MCUs
• MAC Address Filtering
  • By filtering frames based on the destination address, Ethernet frames not intended for a certain node are not processed by the host, thus reducing the load
  • The MAC will see the frame, process the address, drop it based on the filter criteria, and the host will not need to handle it
• Supports IEEE802.3 CSMA/CD Collision Detection
  • PLCA mode will default to CSMA/CD collision detection, if needed

Applications

• Industrial Automation
• Sensor and Control Interfacing
• Home / Building Control
• Security and Field Instrumentation