Microchip LAN8650/1

10BASE-T1S MAC-PHY Ethernet controller with SPI

The LAN8650/1 combines a Media Access Controller (MAC) and an Ethernet PHY to enable low-cost microcontrollers, including those without an on-board MAC, to access to 10BASE‑T1S networks. The common standard Serial Peripheral Interface (SPI) of the LAN8650 allows interfacing with nearly any microcontroller, so that the transfer of Ethernet packets and LAN8650 control/status commands are performed over a single, serial interface. SPI also requires only 4 pins, enabling a simpler hardware interface with fewer pins than MII or RMII.

 

Key features

• High-performance 10BASE‑T1S single-pair Ethernet PHY
• 10 Mbit/s over a single balanced pair of conductors
• Integrated Media Access Controller (MAC)
• Industry standard Serial Peripheral Interface (SPI)

 

Additional features

• Designed to IEEE Std. 802.3cg™-2019
• Half-duplex point-to-point link segments up to at least 15m
• Half-duplex multidrop mixing segments up to at least 25m with up to at least 8 PHYs, reducing costs for cabling and switch ports
• Optional frame filtering to limit incoming packets
• Designed to the OPEN Alliance 10BASE‑T1x MAC‑PHY Serial Interface specification, V1.1
• Supports clock rates up to 25 MHz
• Physical Layer Collision Avoidance (PLCA)
  • Allows for high bandwidth utilization by avoiding collisions on the physical layer
  • Burst mode for transmission of multiple packets for high packet rate latency-sensitive applications
     
• Carrier Sense Multiple Access / Collision Detection (CSMA/CD) media access control
• Supports time-sensitive networking by timestamping frame ingress and egress
• EtherGREEN™ Energy efficiency
  • Low power 10BASE‑T1S PHY operation
  • Ultra-low power sleep mode
  • Wake up triggered by either MDI activity or local WAKE_IN
  • WAKE_OUT pulse assertion
  • INH output for enable/disable of ECU supply
     
• Over-temperature and under-voltage protection
• Comprehensive status interrupt support
• Enhanced electromagnetic compatibility / electromagnetic interference (EMC/EMI) performance
  • Low RF emissions
  • Robust against injected currents and network cable shorts to ground or battery
  • Simple low cost analog front-end
     
• Small footprint 32-pin (5 x 5 mm) VQFN package with wettable flanks
• -40°C to +125°C extended temperature range

 

Applications

• Sensor/actuator networks operating at high bandwidth
• Industrial control cabinets and machine control
• Building automation
• Audio networks delivering multiple streams

 

 

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