KSZ8999

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).

Useful configurations include a stand alone eight port switch as well as a eight port switch with a routing element connected to the extra MII port. The additional port is also useful for a public network interfacing. The KS8999 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 KS8999 supports 10BaseT, 100BaseTX and 100BaseFX 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 and smaller chip die size.

Microchip's complimentary and confidential LANCheck® online design review service is available for customers who have selected our products for their application design-in. The  is subject to Microchip's  and requires a myMicrochip account.

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 of 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 industrial 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)
Parameter
Parameter Name Value Value
Description 9-Port 10/100 Ethernet Switch 9-Port 10/100 Ethernet Switch
Ethernet Bandwidth 10Base-T/100Base-TX/FX 10Base-T/100Base-TX/FX
MAC 9 9
PHY 8 8
TX/RX RAM Buffer(Bytes) MII MII
LEDs 36 36
Op. Voltage (V) 3.3 3.3
# Ethernet Ports 9 9
Interface MII MII
Temp. Range Min. (°C) -40 -40
Temp. Range Max. (°C) 85 85
# of Ports 9 9
Host Interface MII MII
# of Ether Ports 9 9
Copper Support 10/100 (8) 10/100 (8)
Fiber Support 100FX (8) 100FX (8)
MII Yes Yes
SNI Yes Yes
Supply Voltage (V) 3.3 3.3
Vdd I/O (V) 3.3 3.3
Pin-Pin With n/a n/a
ESD Rating (KV) n/a n/a
Smart Power Adjust n/a n/a
WOL n/a n/a
IPV6 Yes Yes
# of VLAN 9 9
Flow Ctrl Yes Yes
Documents
KSZ8999 Data SheetData Sheets02/19/2016438KB
AN2157 - Transient Protection in Power Over Ethernet ApplicationsAppNote05/24/2016229KB
Micrel AN 109 - Unmanaged Ethernet Redundant RingAppNote10/02/201567KB
Micrel AN 114 - Virtual LANAppNote10/02/201585KB
Micrel AN 24 - Ethernet over POFAppNote10/01/2015149KB
Micrel AN 25 - EtherSynch - Synchronization PerfectedAppNote10/01/2015267KB
Micrel AN 27 - Fast Ethernet: Delivery of Data in Industrial ApplicationsAppNote10/01/2015108KB
Micrel AN 31 - General PCB Design and Layout GuidelinesAppNote10/01/2015104KB
Micrel AN 32 - Get in Sync!AppNote10/01/20151432KB
Micrel AN 44 - Interfacing Fast Ethernet to ProcessorsAppNote10/01/2015149KB
Micrel AN 45 - Interfacing Fast Ethernet Transceivers to MAC ProcessorsAppNote10/01/2015122KB
Micrel AN 6 - Avoiding Bus Contention on ConfigurationAppNote09/30/201515KB
Micrel AN 8 - Capacitive Coupling Ethernet Transceivers without Using TransformersAppNote09/30/2015103KB
Micrel AN 81 - PHY Speed and Duplex ConfigurationAppNote10/02/2015132KB
Micrel AN 91 - Reducing Maintenance Costs With Cable Diagnosis and Micrels LinkMDAppNote10/02/2015420KB
KS8999_V1.2_DP.zipDesign Guides02/19/20162126KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
KSZ8999208PQFP0C to +70CTRAY17.7314.7713.4412.4111.77
KSZ8999I208PQFP-40C to +85CTRAY25.8521.5419.5918.1017.16
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RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
KSZ899910.916667208PQFP28x28x3.32mmMatte Tine3
KSZ8999I10.916667208PQFP28x28x3.32mmMatte Tine3
KSZ8999 Data Sheet KSZ8999
AN2157 LAN9355
Micrel AN 109 KSZ8999
Micrel AN 114 KSZ8999
Micrel AN 24 KSZ8999
Micrel AN 25 KSZ8999
Micrel AN 27 KSZ8999
Micrel AN 31 KSZ8999
Micrel AN 32 KSZ8999
Micrel AN 44 KSZ8999
Micrel AN 45 KSZ8999
Micrel AN 6 KSZ8999
Micrel AN 8 KSZ8999
Micrel AN 81 KSZ8999
Micrel AN 91 KSZ8999
KS8999_V1.2_DP.zip KSZ8999
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