●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 receivers 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.
● 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
