Product details


Type Redriver Number of channels (#) 8 Input compatibility AC-coupling, CML Speed (Max) (Gbps) 10.3 Protocols 10G-SR/LR, 10G-KR, 40G-SR4/LR4, 40G-KR4, Infiniband, Fibre Channel, CPRI, OBSAI, Interlaken, sRIO, General purpose Operating temperature range (C) -40 to 85 open-in-new Find other Ethernet retimers, redrivers & mux-buffers

Package | Pins | Size

WQFN (NJY) 54 55 mm² 10 x 5.5 open-in-new Find other Ethernet retimers, redrivers & mux-buffers


  • Comprehensive product family:

  • DS100KR800: 8-channel, uni-directional repeater

  • DS100KR401: 4x lane, bi-directional repeater

  • DS100BR210: 2-channel, uni-directional repeater

  • DS100BR111: 1x lane, bi-directional repeater
  • 4 lane (8-channel, bi-directional) repeater for 4x 10G-KR and other serial standards up to 10.3 Gbps
  • Transparent management of 10G-KR (802.3ap) link training protocol
  • Low 65 mW/channel (typ) power consumption, with option to power down unused channels
  • Advanced signal conditioning features

  • - Receive Equalization up to 36 dB at 5 GHz

  • - Transmit de-emphasis up to -12 dB

  • - Transmit output voltage control: 700 mV to 1300 mV
  • Programmable via pin selection, EEPROM or SMBus interface
  • Single supply operation selectable: 2.5V or 3.3V
  • -40˚ to +85˚C operating temperature range
  • 3 kV HBM ESD rating
  • Flow-thru pinout in 10mmx5.5mm 54-pin leadless LLP package

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    The DS100KR401 is an extremely low power, high performance repeater designed to support 4 lane (bi-directional) 10G-KR and other high speed interface serial protocols up to 10.3 Gbps. The receiver's continuous time linear equalizer (CTLE) provides a boost of up to +36 dB at 5 GHz (10.3125 Gbps) in each of its eight channels and is capable of opening an input eye that is completely closed due to inter symbol interference (ISI) induced by interconnect medium such as long backplanes or cables, hence enabling host controllers to ensure an error free end-to-end link. The transmitter provides a de-emphasis boost of up to -12 dB and output voltage amplitude control from 700 mV to 1300 mV to allow maximum flexibility in the physical placement within the interconnect channel.

    When operating in 10G-KR mode, the DS100KR401 transparently allows the host controller and the end point to optimize the full link and negotiate transmit equalizer coefficients as defined in the 802.3ap standard. This seamless management of the link training protocol ensures guaranteed system level interoperability with minimum latency.

    With a low power consumption of 65 mW/channel (typ) and option to turn-off unused channels, the DS100KR401 enables energy efficient system design. A single supply of 3.3v or 2.5v is required to power the device.

    The programmable settings can be applied via pin settings, SMBus (I2C) protocol or an external EEPROM. When operating in the EEPROM mode, the configuration information is automatically loaded on power up. This eliminates the need for an external microprocessor or software driver.

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    Technical documentation

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    Type Title Date
    * Data sheet DS100KR401 Ultra Low Power 4 Lane Advanced Repeater for 10G-KR datasheet (Rev. B) Mar. 22, 2012
    Application note Extend reach with Ethernet Redrivers and Retimers for 10G-12.5G Applications May 15, 2020
    Application note Understanding EEPROM Programming for High Speed Repeaters and Mux Buffers Oct. 09, 2014
    User guide DS100KR401EVK User's Guide: 4 Channels SMA Evaluation Kit Oct. 25, 2013

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    PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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