Product details

Type Redriver Protocols General purpose, PCIe1, PCIe2, PCIe3, SAS1, SAS2, SAS3, SATA1, SATA2, SATA3 Applications PCIe, SATA, SAS, 10G-KR 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
Type Redriver Protocols General purpose, PCIe1, PCIe2, PCIe3, SAS1, SAS2, SAS3, SATA1, SATA2, SATA3 Applications PCIe, SATA, SAS, 10G-KR 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
WQFN (NJY) 54 55 mm² 10 x 5.5
  • Proven System Interoperability
  • Comprehensive multi-protocol Repeater Family
  • Low 65-mW/Channel (Typ) Power Consumption,
    With Option to Power Down Unused Channels
  • Transparent Management of Link Training
    Protocol for PCIe and SAS
  • Advanced Signal Conditioning Features
    • Rx CTLE up to 30 dB (24 dB for SAS3)
    • Tx De-Emphasis up to –12 dB
    • Tx Output Voltage Control: 700 – 1300 mV
  • Device Configuration Interface:
    • Pin Selection, EEPROM, or SMBus Interface
  • Single Supply Voltage: 2.5 V or 3.3 V
  • −40°C to 85°C Operating Temperature Range
  • 3-kV HBM ESDRating
  • Flow-Thru Pinout: 54-Pin LLP
    (10 mm × 5.5 mm, 0.5 mm pitch)
  • Supported Protocols
    • SAS/SATA
    • PCIe
    • Other Proprietary Interface up to 12.5 Gbps

All trademarks are the property of their respective owners.

  • Proven System Interoperability
  • Comprehensive multi-protocol Repeater Family
  • Low 65-mW/Channel (Typ) Power Consumption,
    With Option to Power Down Unused Channels
  • Transparent Management of Link Training
    Protocol for PCIe and SAS
  • Advanced Signal Conditioning Features
    • Rx CTLE up to 30 dB (24 dB for SAS3)
    • Tx De-Emphasis up to –12 dB
    • Tx Output Voltage Control: 700 – 1300 mV
  • Device Configuration Interface:
    • Pin Selection, EEPROM, or SMBus Interface
  • Single Supply Voltage: 2.5 V or 3.3 V
  • −40°C to 85°C Operating Temperature Range
  • 3-kV HBM ESDRating
  • Flow-Thru Pinout: 54-Pin LLP
    (10 mm × 5.5 mm, 0.5 mm pitch)
  • Supported Protocols
    • SAS/SATA
    • PCIe
    • Other Proprietary Interface up to 12.5 Gbps

All trademarks are the property of their respective owners.

The DS125BR800A is an extremely low-power high-performance multi-protocol repeater/redriver designed to support eight channels of PCIe, SAS, and other high-speed interface serial protocols up to 12.5 Gbps. The receiver's continuous time linear equalizer (CTLE) provides a boost of up to +30 dB at 6.25 GHz (12.5 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 30in+ backplane traces or 8m+ copper cables, hence enabling host controllers to ensure an error free end-to-end link. The strong linear equalization maximizes interconnect channel extension when the DS125BR800A is placed with the majority of channel loss on the devices input side. Adjustable transmit de-emphasis and output voltage amplitude help to compensate for the remaining channel attenuation on the output side.

When operating in SAS-3 and PCIe Gen-3 mode, the DS125BR800A 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/channel (typ) and option to turn-off unused channels, the DS125BR800A 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 via pins, software (SMBus or I2C) or loaded via 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.

The DS125BR800A is an extremely low-power high-performance multi-protocol repeater/redriver designed to support eight channels of PCIe, SAS, and other high-speed interface serial protocols up to 12.5 Gbps. The receiver's continuous time linear equalizer (CTLE) provides a boost of up to +30 dB at 6.25 GHz (12.5 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 30in+ backplane traces or 8m+ copper cables, hence enabling host controllers to ensure an error free end-to-end link. The strong linear equalization maximizes interconnect channel extension when the DS125BR800A is placed with the majority of channel loss on the devices input side. Adjustable transmit de-emphasis and output voltage amplitude help to compensate for the remaining channel attenuation on the output side.

When operating in SAS-3 and PCIe Gen-3 mode, the DS125BR800A 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/channel (typ) and option to turn-off unused channels, the DS125BR800A 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 via pins, software (SMBus or I2C) or loaded via 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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Type Title Date
* Data sheet DS125BR800A Low-Power 12.5-Gbps 8-Channel (Unidirectional) Repeater With Input E datasheet 05 Nov 2013
Application note Extend reach with Ethernet Redrivers and Retimers for 10G-12.5G Applications 15 May 2020
Technical article Differential pairs: how an equalizer solves insertion-loss impairment 12 Jan 2016
Technical article The future of data converter interfaces 23 Mar 2015
Application note Understanding EEPROM Programming for High Speed Repeaters and Mux Buffers 09 Oct 2014
EVM User's guide DS125BR800AEVM User's Guide 18 Nov 2013

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