1 Features

1• Comprehensive Family, Proven System

Interoperability

– DS125BR111: 1-Lane Repeater

– DS125BR401: 4-Lane Repeater

– DS125BR800: 8-Channel Repeater

– DS125MB203: 2-Port 2:1/1:2 Mux/Switch

– DS125DF410: 4-Channel Unidirectional

Retimer With CDR

• Low 65-mW/Channel (Typical) Power

Consumption, With Option to Power Down

Unused Channels

• Nonlimiting Output for PCIe and 10G-KR Link

Training Support

• Advanced Signal Conditioning Features

– Receive Equalization up to 30 dB at 6.25 GHz

– Transmit De-Emphasis up to –12 dB

– Transmit Output Voltage Control: 700 mV to

1300 mV

• Programmable Through Pin Selection, EEPROM,

or SMBus Interface

• Single Supply Voltage: 2.5 V or 3.3 V (Selectable)

• −40°C to 85°C Operating Temperature Range

• 5-kV HBM ESD Rating

• Flow-Thru Pinout in 10-mm × 5.5-mm 54-Pin

Leadless WQFN Package

• Supported Protocols

– sRIO, Infiniband, Interlaken, CPRI, OBSAI

– Other Proprietary Interface up to 12.5 Gbps

2 Applications

• SAS/SATA (up to 6 Gbps), Fibre Channel (up to

10 GFC)

• PCIe Gen-3/2/1, 10G-KR, 10GbE, XAUI, RXAUI

3 Description

The DS125BR401 device is an extremely low-power

high-performance multiprotocol repeater and redriver

designed to support four lanes of PCIe Gen-3/2/1,

10G-KR, and other high-speed interface serial

protocols up to 12.5 Gbps. The continuous time linear

equalizer (CTLE) of the receiver provides a boost of

up to 30 dB at 6.25 GHz (12.5 Gbps) in each of its eight channels and can open an input eye that is

completely closed due to intersymbol interference

(ISI) induced by interconnect medium such as

backplane traces of 30 inches or more or copper

cables of 8 meters or more, hence enabling host

controllers to ensure an error-free end-to-end link. The transmitter provides a de-emphasis boost of up

to –12 dB and output voltage amplitude control from

700 mV to 1300 mV to allow maximum flexibility in

the physical placement within the interconnect

channel.