DS125BR111SQE Datasheet, PDF (1/5 Pages) Texas Instruments – DS125BR111 Low Power 12.5 Gbps 1-Lane Repeater with Input Equalization and Output

DS125BR111
www.ti.com
SNLS430A – OCTOBER 2012 – REVISED APRIL 2013
DS125BR111 Low Power 12.5 Gbps 1-Lane Repeater with Input Equalization and Output
De-Emphasis
Check for Samples: DS125BR111
FEATURES
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•2 Comprehensive Family, Proven System Inter-
operability
– DS125BR111 : 1-lane, Bi-directional
Repeater
– DS125BR210 : 2-channel, Uni-directional
Repeater
– DS125BR401 : 4-lane, Bi-directional
Repeater
– DS125BR800 : 8-channel, Uni-directional
Repeater
– DS125MB203 : 2-port, 2:1/1:2 Mux/Switch
– DS125DF410 : 4-channel, Uni-directional
Retimer w/CDR
• Low 65 mW/channel (typ) Power Consumption,
with Option to Power Down Unused Channels
• Transparent Management of Link Training
Protocol for PCIe, SAS, 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: 2.5V or 3.3V
(Selectable)
• −40 to 85°C Operating Temperature Range
• 5 kV HBM ESD Rating
• Flow-thru Pinout in 4mmx4mm 24-pin
Leadless WQFN Package
• Supported Protocols
– SAS-3/2/1, SATA, 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 DS125BR111 is an extremely low power, high
performance multi-protocol repeater/redriver designed
to support 1-lane (2 channels, bi-directional) of SAS-
3/2/1, 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 two 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 30”+ 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 SAS-3, 10G-KR and PCIe Gen-3
mode, the DS125BR111 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 specified system level interoperability with
minimum latency. With a low power consumption of
65 mW/channel (typ) and option to turn-off unused
channels, the DS125BR111 enables energy efficient
system design. A single supply of 3.3v or 2.5v is
required to power the device.
The programmable settings can be applied easily via
pins, software (SMBus/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
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