Description

The LAN8670/1/2 is a high-performance 10BASE-T1S single-pair Ethernet PHY transceiver for 10 Mbit/s half-duplex networking over a single pair of conductors. Utilizing standard Ethernet technology in sensor/actuator networks reduces application costs by eliminating gateways necessary with legacy networking technologies. The ability to connect multiple PHYs onto a common mixing segment further saves implementation costs by reducing cabling and switch ports. The LAN8670/1/2 is designed for use in high-reliability cost sensitive automotive, industrial, building automation, and sensor/actuator applications.

Highlights

  • High-performance 10BASE-T1S Ethernet PHY designed according to IEEE Std 802.3™-2022
    • 10 Mbit/s over single balanced pair
    • Half-duplex multidrop mixing segments up to at least 25m with up to at least 8 PHYs
  • Media Independent Interface (MII) and Reduced Media Independent Interface (RMII)
  • Carrier Sense Multiple Access / Collision Detection (CSMA/CD) media access control
  • Physical Layer Collision Avoidance (PLCA)
    • Allows for high bandwidth utilization by avoiding collisions on the medium
    • Burst mode for transmission of multiple packets for latency-sensitive applications
    • Minimize latency for time-sensitive applications by assigning multiple PLCA IDs per node
    • Patented PLCA support over RMII
  • Application Controlled Media Access (ACMA) for implementation of collision-free Time-Division Multiple Access (TDMA) methods
  • IEEE Std 802.1AS™ / IEEE 1588™ application support
    • Enables high-precision clock recovery with ultra-low jitter for microcontrollers without Time-Sensitive Networking (TSN) support
  • Credit-based traffic shaping

  • 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
  • Cable fault (open/short) diagnostics and Signal Quality Indication (SQI) support
  • Over-temperature and under-voltage detection
  • Enhanced electromagnetic compatibility / electromagnetic interference (EMC/EMI) performance
    • Low RF emissions
    • Digital output drive strength adjust
    • Robust against injected currents and network cable shorts to ground or battery
    • Simple low cost bus interface network
  • Single 3.3V supply with integrated 1.8V regulator
  • Small footprint 24-pin (4 x 4 mm), 32-pin (5 x 5 mm), and 36-pin (6 x 6 mm) VQFN with wettable flanks
  • -40°C to +125°C extended temperature range
  • AEC-Q100 qualification
  • Functional Safety Support (ISO 26262, ASIL B)
    • ISO 26262 compliant development
    • Functional Safety Package, including Safety Manual, FMEDA, and Dependent Failure Analysis (DFA)

Target Applications

  • In-vehicle networking and automotive zonal architecture
  • Sensor/actuator networks
  • Industrial control cabinets and machine control
  • Building automation
  • LED lighting