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650 mW typical power
Integrated clock data recovery
On-chip high-frequency PLL
for clock generation and clock
recovery
Supports OC-48 (2.488 Gbps)
with FEC
Reference frequency of 155.52
to 166.63 MHz
RX and TX reference selectable
Interface to LVCMOS/LVTTL
logic
Internal input termination
option built-in
16-bit differential LVPECL/
LVDS data path or single-
ended LVPECL option
196 PBGA package
Diagnostic and line loopback
mode
Support serial loop timing
mode
Lock detect
Signal detect input with polarity
select
Low Jitter LVPECL/LVDS
interface
Internal FIFO to decouple
transmit clocks
Overview
The S3155 transceiver implements
SONET/SDH serialization/deserializa-
tion, and transmission functions. This
chip can be used to implement the front
end of SONET equipment, which con-
sists primarily of the serial transmit inter-
face and the serial receive interface. The
chip handles all the functions of these
two elements, including parallel-to-serial
and serial-to-parallel conversion, clock
generation, and system timing. The
S3155 is divided into a transmitter sec-
tion and a receiver section. The
sequence of operations is as follows:
Transmitter Operations:
1. 16-bit parallel input
2. Parallel-to-serial conversion
3. Serial output
Receiver Operations:
1. Clock and data recovery from serial
input
2. Serial-to-parallel conversion
3. 16-bit parallel output
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Description
The S3155 SONET/SDH transceiver
chip is a fully integrated serialization/
deserialization SONET OC-48 (2.488 -
2.67 Gbps) interface device. The S3155
receives an OC-48 scrambled Non-
Return to Zero (NRZ) signal and
recovers the clock from the data. The
chip performs all necessary serial-to-
parallel and parallel-to-serial functions in
conformance with SONET/SDH
transmission standards. The device is
suitable for SONET-based WDM
applications. The figure below shows a
typical network application.
On-chip clock synthesis is performed by
the high-frequency Phase-Locked Loop
(PLL) on the S3155 transceiver chip
allowing the use of a slower external
transmit clock reference. The chip can
be used with a 155.52 or 166.63 MHz
reference clock in support of existing
system clocking schemes.
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16
AMCC
Missouri
S4802
16
OTX
S3155
16
ORX
S3155
AMCC
Missouri
S4802
ORX
16
OTX
Figure 1. System Block Diagram
Empowering Intelligent Optical Networks
1
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