Micrel, Inc.
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
KS8999
• 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
Ordering Information
Part Number
Temp Range
KS8999
0°C to +70°C
KS8999I
–40°C to +85°C
KSZ8999
0°C to +70°C
KSZ8999I
–40°C to +85°C
Package
208-Pin PQFP
208-Pin PQFP
208-Pin PQFP
208-Pin PQFP
January 2005
2
KS8999