KSZ8873MLLJ Ethernet Switches

By Microchip Technology 200

KSZ8873MLLJ Ethernet Switches

Microchip's KSZ8873MLLJ is the industrial version of the KSZ8873MLL that operates over the extended temperature range of -40°C to +125°C. It is a highly integrated 3-port switch on a chip IC. Low power consumption, advanced power management and QoS features enable a new generation of low port count, cost-sensitive and power efficient 10/100 Mbps switch systems.


  • Advanced switch features
    • Tail tag mode (1 byte added before FCS) support at port 3 to inform the processor which ingress port receives the packet and its priority
    • MAC MII interface supports both MAC mode and PHY mode
  • Comprehensive configuration register access
    • Serial management interface (MDC/MDIO) to all PHYs registers and SMI interface (MDC/MDIO) to all registers
    • High-speed SPI (up to 25 MHz) and I2C master Interface to all internal registers
  • QoS/CoS packet prioritization support
  • Switch monitoring features
    • MIB counters for fully-compliant statistics gathering 34 MIB counters per port
    • Loop-back support for remote diagnostic of failure
  • Low-power dissipation
    • Full-chip hardware/software power-down and per port software power down
    • Energy-detect mode support
    • Per port based software power-save on PHY (idle link detection, register configuration preserved)

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