KSZ8997

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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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
Parameter
Parameter Name Value Value
Description 8-Port 10/100 Ethernet Switch 8-Port 10/100 Ethernet Switch
Ethernet Bandwidth 10Base-T/100Base-TX 10Base-T/100Base-TX
MAC 8 8
PHY 8 8
TX/RX RAM Buffer(Bytes) n/a n/a
LEDs 24 24
Op. Voltage (V) 3.3 3.3
# Ethernet Ports 8 8
Interface 10Base-T/100Base-TX 10Base-T/100Base-TX
Temp. Range Min. (°C) -40 -40
Temp. Range Max. (°C) 85 85
Host Interface 10Base-T/100Base-TX 10Base-T/100Base-TX
# of Ether Ports 8 8
Copper Support 10/100 (8) 10/100 (8)
Supply Voltage (V) 2.1 2.1
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 n/a n/a
# of VLAN 8 8
Flow Ctrl Yes Yes
Rate Limiting n/a n/a
Rapid Spanning Tree n/a n/a
Static MAC Addr n/a n/a
Documents
KS8997/KSZ8997 - 8-Port 10/100 Integrated Switch with PHY and Frame BufferData Sheets11/09/2015614KB
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
KS8997_V1.1_DP.zipDesign Guides02/19/20161420KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
KSZ8997128PQFP0C to +70CTRAY16.7713.9712.7111.7411.13
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RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
KSZ89971.7615004.015152128PQFP14x20x2.72mmMatte Tine3
KS8997/KSZ8997 - 8-Port 10/100 Integrated Switch with PHY and Frame Buffer KSZ8997
AN2157 LAN9355
Micrel AN 109 KSZ8999
Micrel AN 114 KSZ8997
Micrel AN 24 KSZ8997
Micrel AN 25 KSZ8997
Micrel AN 27 KSZ8997
Micrel AN 31 KSZ8997
Micrel AN 32 KSZ8997
Micrel AN 44 KSZ8997
Micrel AN 45 KSZ8999
Micrel AN 6 KSZ8997
Micrel AN 8 KSZ8997
Micrel AN 81 KSZ8999
Micrel AN 91 KSZ8997
KS8997_V1.1_DP.zip KSZ8997
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