General Description

The KS8999 contains eight 10/100 physical layer transceivers, nine MAC (Media Access Control) units with an integrated layer 2 switch. The device runs in two modes. The first mode is an eight port integrated switch and the second is as a nine port switch with the ninth port available through an MII (Media Independent Interface).

Features

• 9 port (8+1) 10/100 integrated switch with eight physical layer transceivers and one MII/SNI interface

• Advanced Ethernet Switch with internal frame buffer

― 128K Byte of SRAM on chip for frame buffering

― 2.0Gbps high performance memory bandwidth

― Wire speed reception and transmission

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

― Automatic address learning, address aging and address migration

• Advanced Switch Features

― Supports 802.1p priority and port based priority

― Supports port based VLAN

― Supports 1536 byte frame for VLAN tag

― Supports DiffServ priority, 802.1p based priority or port based priority o broadcast storm protection

• Proven transceiver technology for UTP and fiber operation

― 10BaseT, 100BaseTX and 100BaseFX modes of operation

― Supports for UTP or fiber on all 8-ports

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

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

― Individual port forced modes (full duplex, 100BaseTX) when auto-negotiation is disabled

― Full-duplex IEEE 802.3x flow control

― Half-duplex back pressure flow control

• Supports MDI/MDI-X auto crossover

• External MAC interface (MII or 7-wire) for router applications

• Unmanaged operation via strapping or EEPROM at system reset time (see Reset Reference Circuit section)

• Comprehensive LED support

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

• 900 mA (1.80W) including physical transmit drivers

• Supports both commercial and industry temperature

― Commercial temperature range: 0°C to +70°C (KS8999)

― Industrial temperature range: –40°C to +85°C (KS8999I)

• Supports lead free products:

― Commercial temperature range: 0°C to +70°C (KSZ8999)

― Industrial temperature range: –40°C to +85°C (KSZ8999I)

• Available in 208-pin PQFP package