DS125BR800 2.5/5.0/8.0 Gbps 8 Chnl PCI Exprs Reptr w/ Eqlztion and De-Emp | TI.com

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2.5/5.0/8.0 Gbps 8 Chnl PCI Exprs Reptr w/ Eqlztion and De-Emp



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.


  • 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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WEBENCH® Designer DS125BR800

Mid Channel:
Max Data Rate:  Gbps

Number of UI:
Eye Diagram


Compare all products in Ethernet retimers, redrivers & mux-buffers Email Download to Excel
Part number Order Device type Number of channels (#) Application Input compatibility Speed (Max) (Gbps) SupplyVoltage (Volt) Protocols Operating temperature range (C) Package Group
DS125BR800 Order now Repeater     8     PCIe
12.5     3.3
General purpose    
-40 to 85     WQFN | 54