Information

Texas Instruments Signal Chain Guide 2013 | 97
Interface
As transmission rates increase from
1 Gbps to 10 Gbps to 100 Gbps, signal
integrity r
equirements become more
stringent for interconnects in chip-to-
chip, chip-to-module, and backplane
applications in datacom and telecom
applications. TI has a comprehensive
porfolio of Interface products to cater to
the needs of Communications segment.
We offer:
• Industrystandardfootprintofhigh-
speed data buffers supporting multiple
signaling technologies up to 3.8 GHz
• Industryleadingsignalconditioners
(repeaters/equalizers, retimers with
CDRs and DFEs) and crosspoint switch/
mux enabling effective management of
signal integrity issues across different
media and channels
• Industry’sbroadestdiscreteSerDes
supportingmultiplestandards&coding
schemes providing the highest signal
integrity
• Best-in-classopticalICsfor
transceivers
• Bandwidth:18GHz,typical
• Per-LaneP/N
Signal Conditioners: Repeaters, Equalizers and Retimers
Get more information: www.ti.com/product/DS125DF410
9.8 to 12.5 Gbps Quad Channel Retimer
DS125DF410
The DS125DF410 is a four-channel multi-rate retimer with integrated signal condition-
ing. The device includes an input Continuous-Time Linear Equalizer (CTLE) and a five-
tap Decision Feedback Equalizer (DFE) on each channel.
Each channel of DS125DF410 independently locks to serial data at data rates fr
om 9.8
to 12.5 Gbps or to any supported submultiple of these data rates. A reference clock is
not required, which simplifies system design and lowers overall cost. The device also
supports half-rate, quarter-rate and one-eighth-rate for backward compatibility. A proto-
col select mode is available to speed up lock time.
DS125DF410 typical application
Key Features
• Typicalpowerdissipation(EQ+CDR+DE):
150 mW / channel
• Typicalpowerdissipation
(EQ+DFE+CDR+DE):180mW/channel
• Locksto1/2,1/4,1/8legacydatarates
• Fastlockoperationbasedonprotocol
select mode
• Adaptiveequalizationupto34dBboost
at 5 GHz
• AdjustabletransmitVOD:600to1300
mVp-p
• Adjustabletransmitde-emphasisto–15dB
• Programmableoutputpolarityinversion
• Inputsignaldetection,CDRlock
detection/indicator
• On-chipeyemonitor(EOM),PRBS
generator
• Single2.5V±5%powersupply
• SMBus/EEPROMconfigurationmodes
Applications
• Host-sidefront-portandbackplane
interface, SFF-8431, SFF-8436
• Ethernet:10GbE,1GbE
• CPRI:Linebitrateoptions3–7
• Interlaken:Alllanebitrates
Line Card
Switch Fabric
ASIC
Back
Plane /
Mid
Plane
Optical Modules
DS125RT410
DS125DF410
Passive Copper
ASIC
DS125DF410
DS125DF410
x4
x4
x4
x4
Connector
Noisy Signal
Clean Signal
10GE
CPRI
Interlaken
Others
SFP+ (SFF8431
QSFP (SFF8436)