DS280BR820 Low Power 28 Gbps 8 Channel Linear Repeater | TI.com

DS280BR820 (ACTIVE)

Low Power 28 Gbps 8 Channel Linear Repeater

Low Power 28 Gbps 8 Channel Linear Repeater - DS280BR820
 

Special note

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Description

The DS280BR820 is an extremely low-power, high-performance eight-channel linear equalizer supporting multi-rate, multi-protocol interfaces up to 28 Gbps. It is used to extend the reach and improve the robustness of high-speed serial links for backplane, front-port, and chip-to-chip applications.

The linear nature of the DS280BR820’s equalization preserves the transmit signal characteristics, thereby allowing the host and link partner ASICs to freely negotiate transmit equalizer coefficients (100G-CR4/KR4). This transparency to the link training protocol facilitates system-level interoperability with minimal effect on the latency. Each channel operates independently, which allows the DS280BR820 to support individual lane Forward Error Correction (FEC) pass-through.

The DS280BR820's small package dimensions, optimized high-speed signal escape, and the pin-compatible Retimer portfolio make the DS280BR820 ideal for high-density backplane applications. Simplified equalization control, low power consumption, and ultra-low additive jitter make it suitable for front-port interfaces such as 100G-SR4/LR4/CR4. The small 8-mm × 13-mm footprint easily fits behind numerous standard front-port connectors like QSFP, SFP, CFP2/CFP4, and CDFP without the need for a heat sink.

Integrated AC coupling capacitors (RX side) eliminate the need for external capacitors on the PCB. The DS280BR820 has a single power supply and minimal need for external components. These features reduce PCB routing complexity and bill of materials (BOM) cost.

A pin-compatible Retimer device is available for longer reach applications.

The DS280BR820 can be configured either via the SMBus or through an external EEPROM. Up to 16 devices can share a single EEPROM.

Features

  • Octal-Channel Multi-Protocol Linear Equalizer Supporting up to 28 Gbps Interfaces
  • Low Power Consumption: 93 mW / Channel (Typical)
  • No Heat Sink Required
  • Linear Equalization for Seamless Support of Link Training, Auto-Negotiation, and FEC Pass-Through
  • Extends Channel Reach by 17 dB+ Beyond Normal ASIC-to-ASIC Capability
  • Ultra-Low Latency: 100 ps (Typical)
  • Low Additive Random Jitter
  • Small 8-mm × 13-mm BGA Package with Integrated RX AC Coupling Capacitors for Easy Flow-Through Routing
  • Unique Pinout Allows Routing High-Speed Signals Underneath the Package
  • Pin-Compatible Retimer Available
  • Single 2.5-V ±5% Power Supply
  • –40°C to +85°C Operating Temperature Range

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Parametrics Compare all products in Ethernet Retimers, Redrivers/Repeaters and MUX Buffers

 
Device Type
Number of Channels (#)
Application
Input Compatibility
Speed (Max) (Gbps)
SupplyVoltage (Volt)
Protocols
Operating Temperature Range (C)
Package Group
Pin/Package
DS280BR820 DS100KR800 DS125BR820 DS280BR810
Repeater     Repeater     Repeater     Repeater    
8     8     8     8    
  Front Port
Backplane
Peripheral I/O    
Front Port
Backplane
Peripheral I/O    
Backplane
Front Port    
CML     AC-Coupled
CML    
AC-Coupled
CML    
CML    
28.125     10.3     12.5     28.125    
2.5     3.3
2.5    
3.3
2.5    
2.5    
  10G-SR/LR
10G-KR
40G-SR4/LR4
40G-KR4
Infiniband
FibreChannel
CPRI
OBSAI
Interlaken
sRIO
General Purpose    
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    
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    
NFBGA     WQFN     WQFN     NFBGA    
135NFBGA     54WQFN     54WQFN     135NFBGA