The KS8997 contains eight 10/100 physical layer transceivers, eight MAC (Media Access Control) units with an integrated layer 2 switch. The device runs as an eight port integrated switch.

The KS8997 is designed to reside in an unmanaged design not requiring processor intervention. This is achieved through I/O strapping or EEPROM programming at system reset time. On the media side, the KS8997 supports 10BaseT and 100BaseTX through auto-negotiation as specified by the IEEE 802.3 committee. Physical signal transmission and reception are enhanced through use of analog circuitry that makes the design more efficient and allows for lower power consumption.

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  8-port 10/100 integrated switch with 8 physical layer transceivers

  32Kx32 of SRAM on chip for frame buffering

  2.0Gbps high performance memory bandwidth

  10BaseT and 100BaseTX modes of operation

  Superior analog technology for reduced power and die size

  Single 2.0V power supply with options for 2.5V and 3.3V I/O

  900mA (1.80 W) including physical transmit drivers

  Supports port based VLAN

  Supports DiffServ priority, 802.1p based priority or port based priority

  Indicators for link, activity, full/half-duplex and speed

  Unmanaged operation via strapping or EEPROM at system reset time

  Hardware based 10/100, full/half, flow control and auto negotiation

  Wire speed reception and transmission

  Integrated address look-up engine, supports 1K absolute MAC addresses

  Automatic address learning, address aging and address migration

  Broadcast storm protection

  Full-duplex IEEE 802.3X flow control

  Half-duplex back pressure flow control

  Comprehensive LED support

  Supports MDI/MDI-X auto crossover

  Commercial temperature range: 0°C to +70°C

  Supports lead free product (KSZ8997) for commercial temperature range: 0°C to +70°C

  Available in 128-pin PQFP package