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 x 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 through the SMBus or through an external EEPROM. Up to 16 devices can share a single EEPROM.
IBIS AMI models, and device GUI profile are available. Request now
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | DS280BR820 Low Power 28 Gbps 8 Channel Linear Repeater datasheet (Rev. B) | PDF | HTML | Oct 3, 2019 |
| Application note | Implementing Pin Compatible Ethernet Redrivers and Retimers | PDF | HTML | Oct 28, 2024 | |
| Application note | Optimal Implementation of 25G-28G Ethernet Retimers versus Redrivers (Rev. B) | PDF | HTML | May 1, 2023 | |
| More literature | Advanced Signal Conditioning Made Easy and Efficient | Jan 12, 2017 | ||
| Application note | Understanding EEPROM Programming for 25G and 28G Repeaters and Retimers | PDF | HTML | Jan 13, 2016 |
For additional terms or required resources, click any title below to view the detail page where available.
The DS280BR820EVM allows for easy evaluation of the DS280BR820 28 Gbps 8-channel linear repeater. To use this EVM, supply power (2.5V or 3.3V) via standard banana connectors and high-speed traffic via Huber+Suhner 1x8 MXP connectors. Huber+Suhner cable assemblies are not included.
Through the (...)
This verified reference design is a signal conditioning solution for front-port QSFP28 supporting two 100GbE ports compatible with 100G-CR4/SR4/LR4, 40G-CR4/SR4/LR4 and 10G SFF-8431 requirements. The design is applicable to optical and passive/active copper cables. It allows for reach extension (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| NFBGA (ZBL) | 135 | Ultra Librarian |
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.