KSZ8081

The KSZ8081xxx is a single-supply 10Base-T/100Base-TX Ethernet physical-layer transceiver for transmission and reception of data over standard CAT-5 unshielded twisted pair (UTP) cable. The KSZ8081xxx is a highly-integrated PHY solution. It reduces board cost and simplifies board layout by using on-chip termination resistors for the differential pairs and by integrating a low-noise regulator to supply the 1.2V core, and by offering 1.8/2.5/3.3V digital I/O interface support.

The KSZ8081RNx offers the Reduced Media Independent Interface (RMII) for direct connection to RMII-compliant MACs in Ethernet processors and switches. As the power-up default, the KSZ8081RNA uses a 25MHz crystal to generate all required clocks, including the 50MHz RMII reference clock output for the MAC. The KSZ8081RND is the version that takes in the 50MHz RMII reference clock as the power-up default.  

The KSZ8081MLX and KSZ8081MNX offer the Media Independent Interface (MII) for direct connection with MII-compliant Ethernet MAC processors and switches. A 25MHz crystal is used to generate all required clocks.

To facilitate system bring-up and debugging in production testing and in product deployment, parametric NAND tree support enables fault detection between KSZ8081RNA I/Os and the board. Microchip's LinkMD® TDR-based cable diagnostics identify faulty copper cabling.  

The KSZ8081RNA and KSZ8081RND are available in 24-pin, lead-free QFN packages. The KSZ8081MNX and KSZ8081RNB are available in 32-pin, lead-free QFN packages. The KSZ8081MLX is available in 48-pin (7mm x 7mm) LQFP package.

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
  • Single-chip 10Base-T/100Base-TX IEEE 802.3 compliant Ethernet transceiver
  • MII interface support (KSZ8081MNX)
  • RMII v1.2 Interface support with a 50MHz reference clock output to MAC, and an option to input a 50MHz reference clock (KSZ8081RNB)
  • RMII back-to-back mode support for a 100Mbps copper repeater
  • MDC/MDIO management interface for PHY register configuration
  • Programmable interrupt output
  • LED outputs for link and activity status indication
  • On-chip termination resistors for the differential pairs
  • Baseline wander correction
  • HP Auto MDI/MDI-X to reliably detect and correct straight-through and crossover cable connections with disable and enable option
  • Auto-negotiation to automatically select the highest linkup speed (10/100Mbps) and duplex (half/full)
  • Power-down and power-saving modes
  • LinkMD® TDR-based cable diagnostics to identify faulty copper cabling
  • Parametric NAND Tree support for fault detection between chip I/Os and the board
  • Loopback modes for diagnostics
  • Single 3.3V power supply with VDD I/O options for 1.8V, 2.5V, or 3.3V
  • Built-in 1.2V regulator for core
  • Available in 24-pin (4mm x 4mm) QFN package, 32-pin (5mm x 5mm) QFN package or 48-pin (7mm x 7mm) LQFP package
Parameter
Parameter Name Value Value
Description 10Base-T/100Base-TX PHY with MII/RMII Support 10Base-T/100Base-TX PHY with MII/RMII Support
Ethernet Bandwidth 10Base-T/ 100Base-TX 10Base-T/ 100Base-TX
Op. Voltage (V) 3.3 3.3
LEDs 2 2
# of Ethernet Ports 1 1
Interface MII/RMII MII/RMII
Temp. Range Min. (°C) -40 -40
Temp. Range Max. (°C) 85 85
HP-Auto MDIX yes yes
Cable Diags Yes Yes
Interface1 MII, RMII MII, RMII
Supply Voltage (V) 3.3 3.3
Vdd I/O (V) 1.8/2.5/3.3 1.8/2.5/3.3
Cable Diagnostics Yes Yes
802.3az No No
Int Term Yes Yes
Supports EtherCAT Yes Yes
Documents
KSZ8081MLX - 10Base-T/100Base-TX PHYData Sheets11/06/20151317KB
KSZ8081MNX/RNB - 10Base-T/100Base-TX PHYData Sheets11/06/20151303KB
KSZ8081RNA/RND - 10Base-T/100Base-TX PHY with RMII SupportData Sheets11/06/20151147KB
KSZ8021_31 to KSZ8081_91 (24-QFN) Migration_updateMigration Documents10/16/2015162KB
KSZ8051 to KSZ8081_91 (32-QFN) MigrationMigration Documents10/16/2015238KB
KSZ8051 to KSZ8081_91 (32-QFN) Migration_updateMigration Documents10/16/2015427KB
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 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
Driver is located in Linux KernelSoftware Library02/01/2016
KSZ8081_8091MLX_v1.2_DP.zipDesign Guides02/19/20163175KB
KSZ8081_8091MNX_v1.2_DP.zipDesign Guides02/19/20166112KB
KSZ8081_8091RNB_v1.2_DP.zipDesign Guides02/19/20163645KB
KSZ8081RNA-RND_v1.2_DP.zipDesign Guides02/19/20163323KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
KSZ8081MLXCA48LQFP0C to +70CTRAY1.261.050.950.880.84
KSZ8081MLXCA-TR48LQFP0C to +70CT/R1.261.050.950.880.84
KSZ8081MLXIA48LQFP-40C to +85CTRAY1.541.281.161.081.02
KSZ8081MLXIA-TR48LQFP-40C to +85CT/R1.541.281.161.081.02
KSZ8081MNXCA32VQFN0C to +70CTRAY1.090.910.820.760.72
KSZ8081MNXCA-TR32VQFN0C to +70CT/R1.090.910.820.760.72
KSZ8081MNXIA-TR32VQFN-40C to +85CT/R1.371.141.040.960.91
KSZ8081RNACA24VQFN0C to +70CTRAY**********
KSZ8081RNACA-TR24VQFN0C to +70CT/R1.010.840.760.710.67
KSZ8081RNAIA-G3XX24VQFN-40C to +85CTRAY**********
KSZ8081RNAIA-G3XX-TR24VQFN-40C to +85CT/R**********
KSZ8081RNAIA-TR24VQFN-40C to +85CT/R1.261.050.950.880.84
KSZ8081RNBCA-G3XX32VQFN0C to +70CTRAY**********
KSZ8081RNBCA-G3XX-TR32VQFN0C to +70CT/R**********
KSZ8081RNBCA-TR32VQFN0C to +70CT/R1.090.910.820.760.72
KSZ8081RNBIA-G3XX32VQFN-40C to +85CTRAY**********
KSZ8081RNBIA-G3XX-TR32VQFN-40C to +85CT/R**********
KSZ8081RNBIA-TR32VQFN-40C to +85CT/R1.371.141.040.960.91
KSZ8081RNDCA-G3XX24VQFN0C to +70CTRAY**********
KSZ8081RNDCA-G3XX-TR24VQFN0C to +70CT/R**********
KSZ8081RNDCA-TR24VQFN0C to +70CT/R1.010.840.760.710.67
KSZ8081RNDIA-TR24VQFN-40C to +85CT/R1.261.050.950.880.84
相关开发工具
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
KSZ8081MLXCA-TR0.1555000.76800048LQFP7x7x1.4mmMatte Tine3
KSZ8081MLXIA0.1555000.69400048LQFP7x7x1.4mmMatte Tine3
KSZ8081MLXCA0.1555000.69400048LQFP7x7x1.4mmMatte Tine3
KSZ8081MLXIA-TR0.1555000.76800048LQFP7x7x1.4mmMatte Tine3
KSZ8081MNXCA0.0614000.40816332VQFN5x5x0.9mmMatte Tine3
KSZ8081RNBIA-TR0.0614000.35000032VQFN5x5x0.9mmMatte Tine3
KSZ8081RNBCA-TR0.0614000.35000032VQFN5x5x0.9mmMatte Tine3
KSZ8081MNXCA-TR0.0614000.35000032VQFN5x5x0.9mmMatte Tine3
KSZ8081MNXIA-TR0.0614000.35000032VQFN5x5x0.9mmMatte Tine3
KSZ8081RNBIA-G3XX0.0641000.09921932VQFN5x5x0.9mmNiPdAue4
KSZ8081RNBIA-G3XX-TR0.0641000.21400032VQFN5x5x0.9mmNiPdAue4
KSZ8081RNBCA-G3XX0.0641000.09921932VQFN5x5x0.9mmNiPdAue4
KSZ8081RNBCA-G3XX-TR0.0641000.21400032VQFN5x5x0.9mmNiPdAue4
KSZ8081RNDCA-G3XX0.0422000.55510224VQFN4x4x0.9mmNiPdAue4
KSZ8081RNDCA-G3XX-TR0.0422000.20400024VQFN4x4x0.9mmNiPdAue4
KSZ8081RNAIA-G3XX0.0422000.55510224VQFN4x4x0.9mmNiPdAue4
KSZ8081RNAIA-G3XX-TR0.0422000.20400024VQFN4x4x0.9mmNiPdAue4
KSZ8081RNACA0.0387000.55510224VQFN4x4x0.9mmMatte Tine3
KSZ8081RNACA-TR0.0387000.20400024VQFN4x4x0.9mmMatte Tine3
KSZ8081RNAIA-TR0.0387000.20400024VQFN4x4x0.9mmMatte Tine3
KSZ8081RNDCA-TR0.0387000.20400024VQFN4x4x0.9mmMatte Tine3
KSZ8081RNDIA-TR0.0387000.20400024VQFN4x4x0.9mmMatte Tine3
KSZ8081MLX - 10Base-T/100Base-TX PHY KSZ8081
KSZ8081MNX/RNB - 10Base-T/100Base-TX PHY KSZ8081
KSZ8081RNA/RND - 10Base-T/100Base-TX PHY with RMII Support KSZ8081
KSZ8081MLX Brochure KSZ8081RNB-EVAL
KSZ8081MNX-RNB Brochure KSZ8081RNB-EVAL
KSZ8021_31 to KSZ8081_91 (24-QFN) Migration_update KSZ8081RNB-EVAL
KSZ8051 to KSZ8081_91 (32-QFN) Migration KSZ8091RNB-EVAL
KSZ8051 to KSZ8081_91 (32-QFN) Migration_update KSZ8091MNX-EVAL
AN2157 LAN9353
Micrel AN 109 KSZ8995
Micrel AN 114 KSZ8999
Micrel AN 24 KSZ8999
Micrel AN 25 KSZ8999
Micrel AN 27 KSZ8997
Micrel AN 31 KSZ8999
Micrel AN 32 KSZ8999
Micrel AN 44 KSZ8997
Micrel AN 45 KSZ8999
Micrel AN 8 KSZ8999
Micrel AN 81 KSZ8999
Micrel AN 91 KSZ8997
KSZ8081_8091MLX_v1.2_DP.zip KSZ8081
KSZ8081_8091MNX_v1.2_DP.zip KSZ8091
KSZ8081_8091RNB_v1.2_DP.zip KSZ8091
KSZ8081RNA-RND_v1.2_DP.zip KSZ8081
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