DS125BR401SQ Datasheet, PDF (1/52 Pages) Texas Instruments – Low-Power 12.5-Gbps 4-Lane Repeater With Input Equalization and Output De-Emphasis

DS125BR401
www.ti.com
SNLS419C – JULY 2012 – REVISED APRIL 2013
Low-Power 12.5-Gbps 4-Lane Repeater With Input Equalization and Output De-Emphasis
Check for Samples: DS125BR401
FEATURES
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•2 Comprehensive Family, Proven System
Interoperability
– DS125BR111 : One-Lane Bidirectional
Repeater
– DS125BR210 : Two-Channel Unidirectional
Repeater
– DS125BR401 : Four-Lane Bidirectional
Repeater
– DS125BR800 : Eight-Channel Unidirectional
Repeater
– DS125MB203 : Two-Port 2:1/1:2 Mux/Switch
– DS125DF410 : Four-Channel Unidirectional
Retimer With CDR
• Low 65-mW/Channel (Typ) Power
Consumption, With Option to Power Down
Unused Channels
• Transparent Management of Link Training
Protocol for PCIe and 10G-KR
• 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 via 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 10mmx5.5mm 54-Pin
Leadless WQFN Package
• Supported Protocols
– SAS/SATA (up to 6 Gbps), Fibre Channel
(up to 10GFC)
– PCIe Gen-3/2/1, 10G-KR, 10GbE, XAUI,
RXAUI
– sRIO, Infiniband, Interlaken, CPRI, OBSAI
– Other Proprietary Interface up to 12.5 Gbps
DESCRIPTION
The DS125BR401 is an extremely low-power high-
performance multi-protocol repeater/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 receiver's continuous time linear
equalizer (CTLE) provides a boost of up to +30 dB at
6.25 GHz (12.5 Gbps) in each of its eight channels
and is capable of opening an input eye that is
completely 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 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.
When operating in 10G-KR, and PCIe Gen-3 mode,
the DS125BR401 transparently allows the host
controller and the end point to optimize the full link
and negotiate transmit equalizer coefficients. This
seamless management of the link training protocol
ensures guaranteed system level interoperability with
minimum latency. With a low power consumption of
65 mW/channel (typ) and option to turn-off unused
channels, the DS125BR401 enables energy efficient
system design. A single supply of 3.3 V or 2.5 V is
required to power the device.
The programmable settings can be applied easily via
pins, software (SMBus or I2C), or loaded via an
external EEPROM. When operating in the EEPROM
mode, the configuration information is automatically
loaded on power up, which eliminates the need for an
external microprocessor or software driver.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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