DS125BR820 Low-Power 12 Gbps 8-Channel Linear Repeater With Equalization | TI.com

DS125BR820 (ACTIVE)

Low-Power 12 Gbps 8-Channel Linear Repeater With Equalization

 

Description

The DS125BR820 is an extremely low-power high-performance repeater/redriver designed to support eight channels carrying high speed interface up to 12.5 Gbps, such as 40G-CR4, 40G-KR4, SAS/SATA, and PCIe. The receiver’s continuous time linear equalizer (CTLE) provides high frequency boost that is programmable from 3 to 10 dB at 6 GHz (12 Gbps) followed by a linear output driver. The CTLE receiver is capable of opening an input eye that is completely closed due to inter symbol interference (ISI) induced by interconnect medium such as board traces or twin axial-copper cables. The programmable equalization maximizes the flexibility of physical placement within the interconnect channel and improves overall channel performance.

When operating in 40G-CR4/KR4, SAS/SATA, and PCIe applications, the DS125BR820 preserves transmit signal characteristics, thereby allowing the host controller and the end point to negotiate transmit equalizer coefficients. This transparency in the link training protocol facilitates system level interoperability and minimizes latency.

The programmable settings can be applied easily via pin control, software (SMBus or I2C), or direct loading from an external EEPROM. In EEPROM mode, the configuration information is automatically loaded on power up, thereby eliminating the need for an external microprocessor or software driver.

Features

  • Low 70 mW/Channel (Typ) Power Consumption,
    with Option to Power Down Unused Channels
  • Seamless Link Training Support
  • Enables Host ASIC to Meet Front-Port Eye Mask
    Requirements over Longer Reach
  • Advanced Configurable Signal Conditioning I/O
    • Receive CTLE up to 10 dB at 6 GHz
    • Linear Output Driver
    • Variable Output Voltage Range up to 1200
      mVp-p
  • Programmable via Pin Selection, EEPROM, or
    SMBus Interface
  • Single Supply Voltage: 2.5 V or 3.3 V
  • −40°C to 85°C Operating Temperature Range
  • Flow-Thru Layout in 10 mm × 5.5 mm 54-Pin
    Leadless WQFN Package

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Parametrics Compare all products in Ethernet retimers, redrivers/repeaters & MUX buffers

 
Device type
Number of channels (#)
Application
Input compatibility
Speed (Max) (Gbps)
SupplyVoltage (Volt)
Protocols
Operating temperature range (C)
Package Group
Pin/package
DS125BR820 DS100KR800 DS280BR810 DS280BR820
Repeater     Repeater     Repeater     Repeater    
8     8     8     8    
Front Port
Backplane
Peripheral I/O    
Front Port
Backplane
Peripheral I/O    
Backplane
Front Port    
 
AC-Coupled
CML    
AC-Coupled
CML    
CML     CML    
12.5     10.3     28.125     28.125    
3.3
2.5    
3.3
2.5    
2.5     2.5    
10G-SR/LR
10G-KR
40G-SR4/LR4
40G-KR4
SAS1
SAS2
SAS3
SATA1
SATA2
SATA3
Infiniband
FibreChannel
CPRI
OBSAI
Interlaken
sRIO
General Purpose
PCIe1
PCIe2
PCIe3    
10G-SR/LR
10G-KR
40G-SR4/LR4
40G-KR4
Infiniband
FibreChannel
CPRI
OBSAI
Interlaken
sRIO
General Purpose    
IEEE802.3bj
100GbE
Infiniband EDR
OIF-CEi-25G-LR/MR/SR/VSR/CR
100G-CR
QSFP28
CFP2/CFP4
CDFP    
 
-40 to 85     -40 to 85     -40 to 85     -40 to 85    
WQFN | 54     WQFN | 54     NFBGA | 135     NFBGA | 135    
54WQFN     54WQFN     135NFBGA     135NFBGA    

Design tool

WEBENCH® Designer DS125BR820

Tx:
Mid Channel:
Rx:
Max Data Rate:  Gbps

 
Number of UI:
PRBS:
 
Eye Diagram