DS125BR820
- 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
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.
技术文档
设计与开发
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DS125BR820EVM — DS125BR820EVM：12.5Gbps 8 通道带均衡功能的中继器评估模块
DS125BR820EVM – SMA 评估套件提供了一套完备的高带宽平台，可评估德州仪器 (TI) DS125BR820 中继器/转接驱动器的 40GbE、PCIe 和 SAS/SATA 信号调节功能。DS125BR820EVM 可用于标准符合性测试、性能评估和初始系统原型设计。DS125BR820EVM 所用的 SMA 边缘安装连接器可通过市面上销售的分接头电缆、适配器和适配器板（未包含在内）与多种系统连接器连接。这种灵活的连接可在 TI 中继器与第三方 ASIC/FPGA 主机板之间实现集成式系统级测试。
SIGCONARCHITECT-WRTE — SigCon Architect With RTE v2.0.0.8
TIDA-00417 — 2 端口 40GbE/10GbE QSFP+ 信号调节器参考设计
此经过验证的参考设计是一款适用于前端口 QSFP+ 的信号调节解决方案，支持两个 40GbE 端口，符合 40G-CR4/SR4/LR4 及10G SFF-8431 要求。该设计适合光学和无源/有源铜缆。它允许在交换 ASIC 和前端口 QSFP+ 之间进行延伸，这通常是机架顶部 (ToR) 交换机的最外侧端口或 QSFP+ 线路卡的附加夹层实现所需的。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| WQFN (NJY) | 54 | Ultra Librarian |
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