General Description

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.

Features

• 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

Applications

• Small workgroup switches

• VoIP infrastructure switches