Product details


Product type Redriver Number of channels (#) 8 Input compatibility AC-coupling, CML Speed (Max) (Gbps) 12.5 Protocols 10G-KR, sRIO, Infiniband, Interlaken, CPRI, OBSAI, PCIe1, PCIe2, PCIe3, 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 Family, Proven System Inter-Operability
    • DS125BR111: One-Lane Repeater
    • DS125BR401: Four-Lane Repeater
    • DS125BR800: Eight-Channel Repeater
    • DS125MB203: Two-Port 2:1/1:2 Mux/Switch
    • DS125DF410: Four-Channel Retimer With CDR
  • Low 65-mW/Channel (Typical) Power Consumption, With Option to Power Down Unused Channels
  • "Non-Limiting" 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
  • 3-kV HBM ESD Rating
  • Flow-Thru Pinout: 54-Pin WQFN (10-mm × 5.5-mm, 0.5-mm Pitch)
  • Supported Protocols
    • sRIO, Infiniband, Interlaken, CPRI, OBSAI
    • Other Proprietary Interface up to 12.5 Gbps

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The DS125BR800 device is an extremely low-power high-performance multiprotocol repeater/redriver designed to support eight channels 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 30in+ backplane traces or 8m+ copper 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 and PCIe Gen-3 mode, the DS125BR800 transparently allows the host controller and the end point to optimize the full link and negotiate transmit equalizer coefficients. This seamless management of the link training protocol ensures system-level interoperability with minimum latency. With a low power consumption of 65 mW per channel (typical) and option to turn off unused channels, the DS125BR800 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

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Type Title Date
* Datasheet DS125BR800 Low-Power 12.5-Gbps 8-Channel Repeater With Input Equalization and Output De-Emphasis datasheet (Rev. F) Nov. 19, 2018
Application notes Understanding EEPROM Programming for High Speed Repeaters and Mux Buffers Oct. 09, 2014
User guides DS125BR800EVK User's Guide Nov. 12, 2012

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WQFN (NJY) 54 View options

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