SNLA335B september   2019  – may 2023 DS250DF210 , DS250DF230 , DS250DF410 , DS250DF810 , DS280BR810 , DS280BR820 , DS280DF810 , DS280MB810

 

  1.   Optimal Implementation of 25G/28G Retimers versus Redrivers in Common Applications
  2.   Trademarks
  3. 1Overview of TI 25G/28G Retimers and Redrivers
  4. 2When to use a Retimer Versus Redriver
  5. 3Retimers for Common Network Interfaces
  6. 4Link Training Support With TI Signal Conditioning Devices
  7. 5Retimer and Redrivers Part Selection
  8. 6Revision History

3 Retimers for Common Network Interfaces

Referring back to Section 5, TI's 25G/28G retimer part numbers cover slightly different but over-lapping data rates, as each is targeted for specific sets of high-speed interface applications as part of a networking system. Table 3-1 lists the most common high-speed networking interface standards utilizing TI retimers along with recommendations on the most appropriate TI retimer part numbers.

Table 3-1 Retimer Part Numbers Mapping To Networking Standards Interfaces
STANDARD NETWORKING HIGH-SPEED INTERFACE CASEDATA RATE(S) INVOLVED, IN UNIT OF GbpsSUITABLE RETIMER PART NUMBER(S)
CEI-25G electrical interfaces (SR, MR and LR)25.78125DS250DF810, DS280DF810, DS250DF410, DS250DF210, DS250DF230
CEI-28G very short reach (VSR) interfaces28DS280DF810
25G Ethernet long reach backplane or copper cable interfaces (i.e. KR4, CR4)25.78125DS250DF810, DS280DF810, DS250DF410, DS250DF210, DS250DF230
25G/10G Ethernet front port optical host interfaces25.78125, 10.3125DS250DF810, DS280DF810, DS250DF410, DS250DF210, DS250DF230
OTU4 and OTU2 telecom system front port optical host interfaces27.95, 10.7DS280DF810
CPRI-7 chip-to-chip or chip-to-module interfaces24.33 plus legacy CPRI ratesDS250DF230 (preferred solution), DS250DF810, DS280DF810, DS250DF410
16G Fibre Channel switch chip-to-module or chip to chip-to-chip interfaces14.025, 8.5 and 4.25DS280DF810