Product details


Type Redriver Protocols 10G-CR, 10G-KR, 10G-SR/LR, 40G-CR4, 40G-KR4, 40G-SR4/LR4, CPRI, Fibre Channel, General purpose, Infiniband, Interlaken, OBSAI, PCIe1, PCIe2, PCIe3, sRIO Applications PCIe, SATA, SAS Number of channels (#) 8 Speed (Max) (Gbps) 12.5 Supply voltage (V) 3.3, 2.5 Rating Catalog Operating temperature range (C) -40 to 85 open-in-new Find other PCIe, SAS & SATA ICs

Package | Pins | Size

WQFN (NJY) 54 55 mm² 10 x 5.5 open-in-new Find other PCIe, SAS & SATA ICs


  • Comprehensive Family, Proven System
    • DS125BR111: 1-Lane Repeater
    • DS125BR401: 4-Lane Repeater
    • DS125BR800: 8-Channel Repeater
    • DS125MB203: 2-Port 2:1/1:2 Mux/Switch
    • DS125DF410: 4-Channel Unidirectional
      Retimer With CDR
  • Low 65-mW/Channel (Typical) Power
    Consumption, With Option to Power Down
    Unused Channels
  • Nonlimiting Output for PCIe and 10G-KR Link
    Training Support
  • Advanced Signal Conditioning Features
    • Receive Equalization up to 30 dB at 6.25 GHz
    • Transmit De-Emphasis up to –12 dB
    • Transmit Output Voltage Control: 700 mV to
      1300 mV
  • Programmable Through Pin Selection, EEPROM,
    or SMBus Interface
  • Single Supply Voltage: 2.5 V or 3.3 V (Selectable)
  • –40°C to 85°C Operating Temperature Range
  • 5-kV HBM ESD Rating
  • Flow-Thru Pinout in 10-mm × 5.5-mm 54-Pin
    Leadless WQFN Package
  • Supported Protocols
    • sRIO, Infiniband, Interlaken, CPRI, OBSAI
    • Other Proprietary Interface up to 12.5 Gbps
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The DS125BR401 device is an extremely low-power high-performance multiprotocol repeater and redriver designed to support four lanes of PCIe Gen-3/2/1, 10G-KR, and other high-speed interface serial protocols up to 12.5 Gbps. The continuous time linear equalizer (CTLE) of the receiver provides a boost of up to 30 dB at 6.25 GHz (12.5 Gbps) in each of its eight channels and can open an input eye that is completely closed due to intersymbol interference (ISI) induced by interconnect medium such as backplane traces of 30 inches or more or copper cables of 8 meters or more, 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, and PCIe Gen-3 mode, the DS125BR401 allows the host controller and the end point to optimize the full link and negotiate transmit equalizer coefficients. This transparency to the link training protocol can extend the maximum channel loss with minimum latency. With a low power consumption of 65 mW/channel (typical) and the option to turn off unused channels, the DS125BR401 enables energy efficient system design. A single supply of 3.3 V or 2.5 V is required to power the device.

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

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 3
Type Title Date
* Datasheet DS125BR401 Low-Power, 12.5-Gbps, 4-Lane Repeater With Input Equalization and Output De-Emphasis datasheet (Rev. D) May 14, 2015
Application note Understanding EEPROM Programming for High Speed Repeaters and Mux Buffers Oct. 09, 2014
User guide DS125BR401EVK User’s Guide Nov. 09, 2012

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