product brief
Intel
LXT16768/69/59
Multiplexer/DeMultiplexer Chipset
Product Overview
The Intel
LXT16768, LXT16769, and
LXT16759 form a high-performance Mutiplexer/
DeMultiplexer (MUX/DeMUX) chipset for SONET
OC-192 telecommunications systems, Optical
Transport Network (OTN) systems with Enhanced
Forward Error Correction (EFEC), Dense Wave-
length Division Multiplexing (DWDM) for terrestrial
and submarine transport systems, and fiber optic
test equipment.
Manufactured using the BiCMOS7 process
for optimal power and performance ratio, the
Intel LXT16768/69 chipset ensures stability and
reliability in Telco-class networking equipment.
The 12.5Gbps chipset is perfectly aligned with
the Intel
IXF30007 (EFEC) to provide 9dB
gain in system sensitivity specifically for Ultra
Long-Haul applications.
The Intel
LXT16768 DeMUX
This high-performance Serializer/Deserializer
(SerDes) chipset features low-power dissipation
and automatic operation adjustment in the
1112Gbps and 1213Gbps range. The
LXT16768 has an integrated Clock and Data
Recovery device (CDR) with 1:16 DeMUX and
Limiting Amplifier (LIA).
The Intel LXT16768 has a DeMUX merged
with a CDR and is fully compliant with the Optical
Interface Forum's SFI-4 recommendation on
common electrical interface between framers
and SerDes for OC-192/STM 64.
The 12.5Gbps DeMUX transforms the serial
data signals into 16-bit parallel data signals at
a corresponding lower data rate.
The Intel
LXT16769/59 MUX
The Intel LXT16769/59 features a 16:1
transmitter with integrated clock generation,
Phase Locked Loop (PLL) circuits, and
MUX with a 2-bit FIFO and dynamic phase
alignment. The integrated functionalities in
the devices ensure a simple board design,
high input sensitivity, and optimal power
consumption.
The Intel LXT16759 features a full or half
line rate output clock. The fully integrated
on-chip PLLs feature the unique dynamic phase
alignment between ASIC and MUX and eliminate
critical clock and data timing relations. Contin-
uous handling of round-trip delay variations
by the source synchronous clocking ensures
easy external optimization of jitter.
CLK
CLK
O/E
LDD
MUX
ASIC
CLK
CLK
O/E
TIA
LIA/AGC
CDR
DeMUX
ASIC
Typical receiver line card
Typical transmitter line card
(continued)
The Intel
LXT16769/59 MUX
(continued)
Intel has directed significant effort in the system and
component design at maintaining precise, constant
duration of the bit periods in the outgoing data stream.
The Intel LXT16769/59 MUX converts a 16-bit parallel
signal into one serial bit stream at a corresponding
higher data rate.
The clock interconnections between the MUX and
the data source, such as the framer, can be complex in
high-speed applications. In high-speed clock operation
for MUX, the input sampling clock must be in the phase
to ensure correct loading of the data into the MUX so
that input data can be sampled correctly. In addition, the
internal high-speed clock used for shifting data to the
laser must be as clean as possible to minimize the jitter
in the output signal.
The SerDes chipset features high integration of
functionalities which simplifies board design and saves
cost. The lower power increases reliability and longer
surrounding chip life, and superior sensitivity saves cost
by eliminating the need for additional amplification parts.
Optimal power performance ratios, excellent jitter per-
formance, and support for enhanced FEC applications
with up to 30 percent overhead processing makes the
Intel LXT16768/16769 chipset ideal for Long-Haul/Ultra
Long-Haul transmission.
IXF30007
DESERIALIZER
LXT16768
SERIALIZER
LXT16769
REFCLK
RXDATA
RXCLK
TXDATA
TXCLK
12.5Gbps
16
16
12.5Gbps
TXCLK SCR
System Application Layout
s
Enhanced Forward Error Correction (EFEC)
s
Terrestrial backbone telecommunication systems
s
Submarine telecommunication systems
s
Test equipment
Key Applications
1112Gbps or 1213Gbps receivers/transmitters
Long-Haul/Ultra Long-Haul Optical Networking Equipment
s
Extended Optical Transport Networking (OTU2V which is
specifying higher than 7% overhead processing)
s
DWDM line system
s
Optimal power consumption
s
Helps ensure stability and reliability, as well as longer
surrounding chip life
s
Supports overhead processing from 10%30% for
extended OTN applications
s
LXT16768/69 and IXF30007 are key components for
LH/ULH DWDM transmission systems
s
Superior input sensitivity saves cost by eliminating
the need for additional amplification parts
s
I
mproves overall system sensitivity with optimized
sampling point for asymmetric input signal
s
Small physical form factor (13x13mm) supports
reduced board space
s
Secures interoperability between DeMUX (receiver)
and Framer
LXT16768 DeMUX
Features
Benefits
s
Dual Power Supply: +1.8V/+3.3V
s
Power Dissipation: 0.85W
s
Features operation ranges:
Option/01: 1112Gbps
Option/02: 1213Gbps
s
Interfaces to IXF30007 EFEC for support of up to 30%
overhead processing for 9dB improved system sensitivity
s
Integrated LIA, CDR, and DeMux
s
Adjustable decision threshold control
s
132 PBGA Package
s
OIF SFI-4 Compliant Interface
s
Easy board design and integration
s
Ensures stability and reliability, as well as longer
surrounding chip life
s
Supports overhead processing from 10%30% for
extended OTN applications
s
LXT16768/69 and IXF30007 are key components for
LH/ULH DWDM transmission systems
s
Small physical form factor (13x13mm) supports
reduced board space
s
High phase margin tolerance
s
Enables retiming the laser driver and RZ coding for
reducing dispersion at LH/ULH transmission lines
LXT16769/59 MUX
Features
Benefits
s
Single Power Supply: +3.3V
s
Power Dissipation: 0.85W/0.95W
s
Features operation ranges:
Option/01: 1112Gbps
Option/02: 1213Gbps
s
Interfaces to IXF30007 EFEC for support of up to 30%
overhead processing for 9dB improved system sensitivity
s
132 PBGA Package
s
2-bit FIFO combined with dynamic phase alignment
based on PLL
s
LXT16759 features full or half rate clock output
Order Number: 250731-001 Printed in USA/0202/xK/ASI/DC
Copyright 2002 Intel Corporation
For more information, visit the Intel Web site at:
developer.intel.com
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Item
Description
Order Number
Support Collateral/Tools
s
Data Sheet
s
Data Sheet
s
Data Sheet
s
Data Sheet
LXT16768 1113Gbps Deserializer
LXT16769 1113Gbps Serializer
LXT16759 1113Gbps Serializer
LXD70768/69 Evaluation Board
250222-001
250223-001
250285-001
250456-002
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