DS125BR800A Datasheet | Texas Instruments

.ti. SNLS467 - NOVEMBER 2013 Low-Power 12.5-Gbps 8-Channel (Unidirectional) Repeater With Input Equalization Check for Samples: DS125BR800A Features - 2 Proven System Interoperability - prehensive multi-protocol Repeater Family - Low 65-m W/Channel (Typ) Power Consumption, With Option to Power Down Unused Channels - Transparent Management of Link Training Protocol for PCIe and SAS - Advanced Signal Conditioning Features - Rx CTLE up to 30 d B (24 d B for SAS3) - Tx De-Emphasis up to -12 d B - Tx Output Voltage Control: 700 - 1300 m V - Device Configuration Interface: - Pin Selection, EEPROM, or SMBus Interface - Single Supply Voltage: 2.5 V or 3.3 V - - 40°C to 85°C Operating Temperature Range - 3-k V HBM ESD Rating - Flow-Thru Pinout: 54-Pin LLP (10 mm x 5.5 mm, 0.5 mm pitch) - Supported Protocols - SAS/SATA - PCIe - Other Proprietary Interface up to 12.5 Gbps DESCRIPTION The DS125BR800A is an extremely low-power highperformance multi-protocol repeater/redriver designed to support eight channels of PCIe, SAS, and other high-speed interface serial protocols up to 12.5 Gbps. The receiver's continuous time linear equalizer (CTLE) provides a boost of up to +30 d B at 6.25 GHz (12.5 Gbps) in each of its eight channels and is capable of opening an input eye that is pletely closed due to inter symbol interference (ISI) induced by interconnect medium such as 30in+ backplane traces or 8m+ copper cables, hence enabling host controllers to ensure an error free end-to-end link. The strong linear equalization maximizes interconnect channel extension when the DS125BR800A is placed with the majority of channel loss on the devices input side. Adjustable transmit de-emphasis and output voltage amplitude help to pensate for the remaining channel attenuation on the output side. When operating in SAS-3 and PCIe Gen-3 mode, the DS125BR800A transparently allows the host controller and the end point to optimize the full link and negotiate transmit equalizer...