product brief
Intel
LXT16726/16727
Serializer/Deserializer Chipset
Product Description
The Intel
LXT16726 and LXT16727 form a
high-performance multiplexer/demultiplexer
(MUX/DeMUX) chipset for use in SDH STM 64
and SONET OC-192 telecommunications sys-
tems, Optical Transport Network (OTN) systems
with Forward Error Correction (FEC), submarine
systems, 10 Gigabit Ethernet systems, and
fiber-optic test equipment.
The Intel
LXT16726/27 chipset is manu-
factured using a well-proven silicon bipolar
technology that offers the performance, stability,
and reliability customers require for optical
communication systems.
The devices are operated from a single +3.3V
or dual +1.8/+3.3V power supply. The chipset
has a low power dissipation of 1.8W (when
operated from a dual power supply).
The LXT16726 features an integrated Limiting
Amplifier (LIA) with high input sensitivity, a
Clock and Data Recovery unit (CDR), and a
1:16 DeMUX.
The LXT16727 features a 16:1 transmitter
with integrated clock generation, Phase
Locked Loop (PLL) circuits, and 16:1 MUX.
The integrated transmitter ensures simple
board design. The high output swing of the
transmitter ensures compatibility with a wide
range of laser drivers.
The LXT16726/27 chipset features two con-
cepts for timing alignment of clock and data
signals. The first, Dynamic Phase Alignment
(DPA), is based on integrated PLLs to eliminate
any skew between clock and data signals
between ASIC and MUX. The continuous
handling of "round trip delay variations" by the
source synchronous clocking ensures easy
external optimization of jitter. The second
scheme is based on a 9-bit FIFO to ensure
critical timing alignment between clock and data
signals. When the latter scheme is used, an
integrated PLL together with an external VCXO
can be used to clean the reference clock com-
ing from the framer. In order to support multiple
line speeds without using external selection
components, the transmitter has been equipped
with three VCXO clock inputs.
In order to facilitate board design, the
LXT16726/27 chipset has been equipped with
bit flip and bit inversion. These features flip the
polarity and/or position of the individual data
I/Os to ensure flexible PCB routing.
The devices allow operation at any line rate
between 9.95 and 10.71Gbps. This provides
for a flexible module with reduced design and
production costs.
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Ideal for MSA Module applications where
power is key
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Helps eliminate the need for an external LIA
therefore reducing cost
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Helps increase design flexibility and ensures
lowest possible power dissipation
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Ensures compatibility with a wide range of
laser drivers
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For SONET and OTN transfer rates; seamless
shift between rates
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Small physical form factor simplifies design and
helps reduce board space
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Ensures seamless support for multiple line
speeds without using external components
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Ensures interoperability between SerDes
chips and framer
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Ensures alignment of data and clock signals
coming from the framer
Features
Benefits
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Combined power dissipation of 1.8W
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Integrated LIA with high input sensitivity
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Single or dual power supply
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High output swing
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Multirate 10 10.7Gbps
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132-pin (13 x 13 mm) PBGA package
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Three VCXO clock inputs
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OIF SFI-4 compliant interface
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9-bit FIFO and DPA
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MSA modules for SDH STM 64, SONET OC-192,
OTN, and 10 Gigabit Ethernet
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FEC systems
Key Applications
Order Number: 251063-001 Printed in USA/0502/5K/ASI/DC
Copyright 2002 Intel Corporation
For more information, visit the Intel Web site at:
developer.intel.com
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International locations please contact your local sales office.
General Information Hotline
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Optical line cards for SDH STM 64, SONET OC-192,
OTN, and 10 Gigabit Ethernet
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Optical test equipment
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Item
Description
Order Number
Support Collateral/Tools
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LXT16726
s
LXT16727
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LXD90726/727
SerDes Chipset Data Sheet
SerDes Chipset Data Sheet
Evaluation Board Data Sheet
250838
250837
251067
Backplane
E/O
E/O
PMD
Discrete
FEC/
Framer/
Mapper
DeMUX
LXT16726
MUX
LXT16727
Optical Line Card Block Diagram
PMD
MSA Module
MSA Connector
MSA Module-based
Backplane
Connector
FEC/
Framer/
Mapper
E/O
E/O
DeMUX
LXT16726
MUX
LXT16727
PDF 
ZIP