TA16 Datasheet, PDF (1/28 Pages) Agere Systems – TA16-Type 2.5 Gbits/s Transponder with 16-Channel 155 Mbits/s Multiplexer/Demultiplexer

Data Sheet
March 2001
TA16-Type 2.5 Gbits/s Transponder with
16-Channel 155 Mbits/s Multiplexer/Demultiplexer
Applications
s Telecommunications:
— Inter- and intraoffice SONET/SDH
— Subscriber loop
— Metropolitan area networks
s High-speed data communications
Description
The TA16-Type transponders integrate up to 15 discrete ICs
and optical components, including a 2.5 Gbits/s optical trans-
mitter and receiver pair, all in a single, compact package.
Features
s 2.5 Gbits/s optical transmitter and receiver with
16-channel 155 Mbits/s multiplexer/demultiplexer
s Available with 1.31 µm Fabry-Perot laser transmit-
ter and PIN receiver for intraoffice applications,
and 1.31 µm or 1.55 µm DFB laser transmitters
and PIN or APD receiver for short-haul to long-haul
applications
s Pigtailed low-profile package
s Differential LVPECL data interface
s Operating case temperature range: 0 °C to 65 °C
s Automatic transmitter optical power control
s Laser bias monitor output
s Optical transmitter disable input
s SONET frame-detect enable
s Loss of signal, loss of sync, loss of framing alarms
s Diagnostic loopback capability
s Line loopback operation
The TA16 transponder performs the parallel-to-serial-
to-optical transport and optical transport-to-serial-to-
parallel function of the SONET/SDH protocol. The
TA16 transmitter performs the bit serialization and
optical transmission of SONET/SDH OC-48/STM-16
data that has been formatted into standard SONET/
SDH compliant, 16-bit parallel format. The TA16
receiver performs the optical-to-electrical conversion
function and is then able to detect frame and byte
boundaries and demultiplex the serial data into 16-bit
parallel OC-48/STM-16 format.
Note: The TA16 transponder does not perform byte-
level multiplexing or interleaving.
Figure 1 shows a simplified block diagram of the
TA16-type transponder. This device is a bidirectional
module designed to provide a SONET or SDH com-
pliant electro-optical interface between the SONET/
SDH photonic physical layer and the electrical sec-
tion layer. The module contains a 2.5 Gbits/s optical
transmitter and a 2.5 Gbits/s optical receiver in the
same physical package along with the electronics
necessary to multiplex and demultiplex sixteen
155 Mbits/s electrical channels. Clock synthesis and
clock recovery circuits are also included within the
module.
In the transmit direction, the transponder module
multiplexes sixteen 155 Mbits/s LVPECL electrical
data signals into an optical signal at 2488.32 Mbits/s
for launching into optical fiber. An internal 2.488 GHz
reference oscillator is phase-locked to an external
155 MHz data timing reference.