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KSZ8081

10/100 Base-T/TX Physical Layer Transceiver

Status: In Production

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
  • Available in 24-pin (4mm x 4mm) QFN package, 32-pin (5mm x 5mm) QFN package or 48-pin (7mm x 7mm) LQFP package
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The KSZ8081 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 KSZ8081 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 LANCheck online design review service is subject to Microchip's Program Terms and Conditions and requires a myMicrochip account.

Additional 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
      Parametrics
      Name
      Value
      Description
      10Base-T/100Base-TX PHY with MII/RMII Support
      Ethernet Bandwidth
      10/100Mbps
      LEDs
      2
      # of Ethernet Ports
      1
      Interface
      MII/RMII
      Temp. Range Min. (°C)
      -40
      Temp. Range Max. (°C)
      85
      HP-Auto MDIX
      yes
      Interface1
      MII, RMII
      Ethercat
      Yes
      Copper Support
      Yes
      Supply Voltage (V)
      3.3
      Internal Regular
      Yes
      MAC I/O Voltage
      1.8/2.5/3.3
      Cable Diagnostics
      Yes
      802.3az
      No
      On-Chip Termination
      Yes
      Supports EtherCAT
      Yes

      Documents

      Jump to:

      Board Design Files

      08/10/2017
      228KB

      Software Library

      Development Environment

      • Demo & Evaluation Boards
      • Software Libraries
      Demo & Evaluation Boards
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      SAMA5D3-XPLD ( ATSAMA5D3-XPLD )

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      SAMA5D4-XULT
      SAMA5D4-XULT ( ATSAMA5D4-XULT )

      The SAMA5D4 Xplained Ultra is a member of Xplained fast prototyping and evaluation platforms. The board is based on the SAMA5D4 microprocessor and comes with a rich set of ready-to-use connectivity, an LCD and HDMI interface, an embedded debug interface unit, as well as storage peripherals and expansion headers for easy customization. A Linux distribution and software package gets you evaluating...

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      SAME70 Xplained Kit
      SAME70 Xplained Kit ( ATSAME70-XPLD )

      The SMART SAM E70 Xplained evaluation kit is ideal for evaluating and prototyping with | SMART SAM S70 and SAM E70 ARM® Cortex®-M7 core- based microcontrollers.

      Extension boards for the SAM E70 Xplained can be purchased individually.

      The ATSAME70-XPLD evaluation kit does not include extension boards.

      Please refer to the respective SAM S70, SAM E70 series web

      ...

      Learn More
      Add To Cart
      KSZ8081MNX EVAL BOARD
      KSZ8081MNX EVAL BOARD ( KSZ8081MNX-EVAL )

      The KSZ8081MNX / KSZ8091MNX is a 10Base-T/100Base-TX Physical Layer Transceiver with an MII MAC interface. It utilizes a unique mixed-signal design to extend signaling distance while reducing power consumption, and offers HP Auto MDI/MDI-X for reliable detection of and correction for crossover and straight-through cables, eliminating the need to differentiate between crossover and straight-through...

      Learn More
      Add To Cart
      KSZ8081RNB EVAL BOARD
      KSZ8081RNB EVAL BOARD ( KSZ8081RNB-EVAL )

      The KSZ8081RNB / KSZ8091RNB is a 10Base-T/100Base-TX Physical Layer Transceiver with an RMII MAC interface. It utilizes a unique mixed-signal design to extend signaling distance while reducing power consumption, and offers HP Auto MDI/MDI-X for reliable detection of and correction for crossover and straight-through cables, eliminating the need to differentiate between crossover and...

      Learn More
      Add To Cart
      KSZ8091RNB EVAL BOARD
      KSZ8091RNB EVAL BOARD ( KSZ8091RNB-EVAL )
      (Not Recommended for new design)

      The KSZ8081RNB / KSZ8091RNB is a 10Base-T/100Base-TX Physical Layer Transceiver with an RMII MAC interface. It utilizes a unique mixed-signal design to extend signaling distance while reducing power consumption, and offers HP Auto MDI/MDI-X for reliable detection of and correction for crossover and straight-through cables, eliminating the need to differentiate between crossover and...

      Learn More
      Add To Cart
      Software Libraries
      Driver is located in Linux Kernel

      The driver for this device resides in the Linux Kernel found here https://www.kernel.org/

      Learn More

      RoHS Information

      Part Number
      Device Weight (g)
      Shipping Weight (grams)
      Lead Count
      Package Type
      Package Width
      Solder Composition
      JEDEC Indicator
      RoHS
      China EFUP
      KSZ8081MNXCA
      0.061400
      0.408163
      32
      VQFN
      5x5x0.9mm
      Matte Tin
      e3
      KSZ8081MNXCA-TR
      0.061400
      0.350000
      32
      VQFN
      5x5x0.9mm
      Matte Tin
      e3
      KSZ8081MNXIA
      0.061400
      0.408163
      32
      VQFN
      5x5x0.9mm
      Matte Tin
      e3
      KSZ8081MNXIA-TR
      0.061400
      0.350000
      32
      VQFN
      5x5x0.9mm
      Matte Tin
      e3
      KSZ8081RNACA
      0.038700
      0.555102
      24
      VQFN
      4x4x0.9mm
      Matte Tin
      e3
      KSZ8081RNACA-TR
      0.038700
      0.204000
      24
      VQFN
      4x4x0.9mm
      Matte Tin
      e3
      KSZ8081RNAIA-TR
      0.038700
      0.204000
      24
      VQFN
      4x4x0.9mm
      Matte Tin
      e3
      KSZ8081RNBCA-G3XX
      0.064100
      0.530612
      32
      VQFN
      5x5x0.9mm
      NiPdAu
      e4
      KSZ8081RNBCA-G3XX-TR
      0.064100
      0.214000
      32
      VQFN
      5x5x0.9mm
      NiPdAu
      e4
      KSZ8081RNBCA-TR
      0.061400
      0.350000
      32
      VQFN
      5x5x0.9mm
      Matte Tin
      e3
      KSZ8081RNBIA-G3XX
      0.064100
      0.530612
      32
      VQFN
      5x5x0.9mm
      NiPdAu
      e4
      KSZ8081RNBIA-G3XX-TR
      0.064100
      0.214000
      32
      VQFN
      5x5x0.9mm
      NiPdAu
      e4
      KSZ8081RNBIA-TR
      0.061400
      0.350000
      32
      VQFN
      5x5x0.9mm
      Matte Tin
      e3
      KSZ8081RNDCA-TR
      0.038700
      0.204000
      24
      VQFN
      4x4x0.9mm
      Matte Tin
      e3
      KSZ8081RNDIA-TR
      0.038700
      0.204000
      24
      VQFN
      4x4x0.9mm
      Matte Tin
      e3
      KSZ8081RNDCA-G3XX-TR
      0.038700
      0.204000
      24
      VQFN
      4x4x0.9mm
      Matte Tin
      e3
      KSZ8081RNAIA-G3XX-TR
      0.038700
      0.204000
      24
      VQFN
      4x4x0.9mm
      Matte Tin
      e3
      KSZ8081RNDCA-G3XX
      0.038700
      0.555102
      24
      VQFN
      4x4x0.9mm
      Matte Tin
      e3
      KSZ8081MLXCA
      0.155500
      0.694000
      48
      LQFP
      7x7x1.4mm
      Matte Tin
      e3
      KSZ8081MLXCA-TR
      0.155500
      0.768000
      48
      LQFP
      7x7x1.4mm
      Matte Tin
      e3
      KSZ8081MLXIA
      0.155500
      0.694000
      48
      LQFP
      7x7x1.4mm
      Matte Tin
      e3
      KSZ8081MLXIA-TR
      0.155500
      0.768000
      48
      LQFP
      7x7x1.4mm
      Matte Tin
      e3
      To see a complete listing of RoHS data for this device, please Click here
      Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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