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
High-speed data communications
s
Description
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.
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
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
Pigtailed low-profile package
Differential LVPECL data interface
Operating case temperature range: 0 °C to 65 °C
Automatic transmitter optical power control
Laser bias monitor output
Optical transmitter disable input
SONET frame-detect enable
Loss of signal, loss of sync, loss of framing alarms
Diagnostic loopback capability
Line loopback operation
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TA16-Type 2.5 Gbits/s Transponder with
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Data Sheet
March 2001
Table of Contents
Contents
Page
Tables
Page
Features .................................................................... 1
Applications ............................................................... 1
Description ................................................................ 1
Absolute Maximum Ratings ....................................... 3
Pin Information .......................................................... 5
Pin Descriptions ........................................................ 6
Functional Description ............................................ 12
Receiver ............................................................. 12
Transmitter ......................................................... 12
Loopback Modes ................................................ 13
Transponder Interfacing ...................................... 13
Optical Characteristics ............................................ 14
Electrical Characteristics ......................................... 15
Timing Characteristics ............................................ 17
Transmitter Data Input Timing ............................ 17
Input Timing Mode 1 .......................................... 18
Input Timing Mode 2 .......................................... 19
Forward Clocking ............................................... 20
PC
LK
-to-PIC
LK
Timing ......................................... 21
PHERR/PHINIT ................................................... 22
Receiver Framing ............................................... 24
Qualification and Reliability ..................................... 26
Laser Safety Information ........................................ 26
Class 1 Laser Product......................................... 26
Electromagnetic Emissions and Immunity .......... 26
Outline Diagram ...................................................... 27
Ordering Information ............................................... 28
Related Product Information .................................... 28
Table 1. TA16-Type Transponder Pinout .................. 6
Table 2. TA16-Type Transponder Input
Pin Descriptions ......................................... 10
Table 3. TA16-Type Transponder Output
Pin Descriptions ......................................... 11
Table 4. OC48/STM-16 Transmitter Optical
Characteristics ........................................... 14
Table 5. OC48/STM-16 Receiver Optical
Characteristics ........................................... 14
Table 6. Transmitter Electrical I/O Characteristics .. 15
Table 7. Receiver Electrical I/O Characteristics ...... 16
Table 8. Power Supply Characteristics ................... 16
Table 9. Transmitter ac Timing Characteristics ....... 23
Table 10. Receiver ac Timing Characteristics ......... 23
Table 11. Ordering Information ................................ 28
Table 12. Related Product Information .................... 28
Figures
Page
Figure 1. TA16-Type Transponder Block Diagram .... 4
Figure 2. TA16-Type Transponder Pinout ................. 5
Figure 3. Transponder Interfacing............................ 13
Figure 4. Block Diagram Timing Mode 1.................. 18
Figure 5. Block Diagram Timing Mode 2.................. 19
Figure 6. Forward Clocking of TA16 Transmitter.....20
Figure 7. PC
LK
-to-PIC
LK
Timing...............................21
Figure 8. PHERR/PHINIT Timing.............................22
Figure 9. ac Input Timing .........................................22
Figure 10. Receiver Output Timing Diagram ...........23
Figure 11. Frame and Byte Detection ......................24
Figure 12. OOF Timing (FRAMEN = High) ..............24
Figure 13. FRAMEN Timing .....................................25
Figure 14. Interfacing to TxR
EF
C
LK
Input................. 25
2
Agere Systems Inc.
Data Sheet
March 2001
TA16-Type 2.5 Gbits/s Transponder with
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
In the receive direction, the transponder module
receives a 2488.32 Mbits/s optical signal and converts
it to an electrical signal, extracts a clock signal, and
then demultiplexes the data into sixteen 155 Mbits/s
differential LVPECL data signals. The optical receiver is
available with either a PIN photodetector or with an
APD photodetector. The receiver operates over the
wavelength range of 1.1 µm to 1.6 µm and is fully com-
pliant to SONET/SDH OC-48/STM-16 physical layer
specifications as shown in Table 5, Optical Characteris-
tics.
Description
(continued)
The optical transmitter is available with either a 1.31 µm
Fabry-Perot laser for short-reach applications or
1.31 µm and 1.55 µm DFB lasers for intermediate- to
long-reach applications. The optical output signal is
SONET and ITU compliant for OC-48/STM-16 applica-
tions as shown in Table 4, Optical Characteristics.
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect reliability.
Parameter
Operating Case Temperature Range
Storage Case Temperature Range
Supply Voltage
Voltage on Any LVPECL Pin
High-speed LVPECL Output Source Current
Static Discharge Voltage
1
Relative Humidity (noncondensing)
Receiver Optical Input Power—Biased:
APD
PIN
Minimum Fiber Bend Radius
1. Human body model.
Symbol
T
C
T
S
—
—
—
ESD
RH
P
IN
P
IN
—
Min
0
–40
–0.5
0
—
—
—
—
—
1.25 (31.8)
Max
75
85
5.5
V
CC
50
500
85
0
8
—
Unit
°C
°C
V
—
mA
V
%
dBm
dBm
in. (mm)
Agere Systems Inc.
3
TA16-Type 2.5 Gbits/s Transponder with
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Data Sheet
March 2001
Block Diagram
TXDIS
LSRBIAS
LSR ALRM
LPM
TXD[0:15]N
PICLKP/N
PHINIT
PHERR
PCLKP/N
TXREFCLKP/N
LOCKDET
LLOOP
RESET
DLOOP
OOF
FRAMEN
SEARCH
FP
POCLKP/N
2
FRAME/BYTE
DETECT
TIMING
GEN
2
2
CLOCK DIVIDER
AND
PHASE DETECT
16
2
TIMING
GENERATION
MUX
16:1 PARALLEL
TO SERIAL
MUX
TXD[0:15]P
16
D
OC-48/STM-16
OPTICAL TRANSMITTER
MUX
CK
RXQ[0:15]P
RXQ[0:15]N
LOS
IPDMON
16
16
MUX
1:16 SERIAL
TO PARALLEL
D
OC-48/STM-16
OPTICAL RECEIVER
W/CLOCK RECOVERY
1-1011(F).e
Figure 1. TA16-Type Transponder Block Diagram
4
Agere Systems Inc.
Data Sheet
March 2001
TA16-Type 2.5 Gbits/s Transponder with
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Pin Information
80
70
60
50
40
30
20
10
1
FGND
NC
NC
NC
NC
RXDGND
RXQ00N
RXQ00P
RXQ02N
RXQ02P
RXDGND
RXQ04N
RXQ04P
RXQ06N
RXQ06P
RXDGND
RXQ08N
RXQ08P
RXQ10N
RXQ10P
RXDGND
RXQ12N
RXQ12P
RXQ14N
RXQ14P
RXDGND
NC
NC
NC
RXDGND
RXAGND
RXAGND
RX3.3A
RXAGND
RXAGND
NC
RX3.3D
RX3.3D
RXDGND
FRAMEN
FP
NC
DLOOP
NC
LSRBIAS
LSRALM
LPM
TXAGND
TX3.3A
TX3.3A
TXAGND
TX3.3D
TX3.3D
TXDGND
LOCKDET
PICLKN
PICLKP
TXDGND
TXD01N
TXD01P
TXD03N
TXD03P
TXDGND
TXD05N
TXD05P
TXD07N
TXD07P
TXDGND
TXD09N
TXD09P
TXD11N
TXD11P
TXDGND
TXD13N
TXD13P
TXD15N
TXD15P
TXDGND
IPDMON
FGND
FGND
NC
NC
NC
NC
RXDGND
RXQ01N
RXQ01P
RXQ03N
RXQ03P
RXDGND
RXQ05N
RXQ05P
RXQ07N
RXQ07P
RXDGND
RXQ09N
RXQ09P
RXQ11N
RXQ11P
RXDGND
RXQ13N
RXQ13P
RXQ15N
RXQ15P
RXDGND
NC
NC
NC
NC
POCLKN
POCLKP
RX3.3A
RXAGND
RXAGND
SEARCH
RX3.3D
RX3.3D
RXDGND
OOF
RXDGND
LOS
LLOOP
PHERR
NC
TXDIS
PHINIT
NC
TX3.3A
TX3.3D
TXAGND
TXDGND
PCLKN
PCLKP
TXDGND
TXD00N
TXD00P
TXDGND
TXD02N
TXD02P
TXD04N
TXD04P
TXDGND
TXD06N
TXD06P
TXD08N
TXD08P
TXDGND
TXD10N
TXD10P
TXD12N
TXD12P
TXDGND
TXD14N
TXD14P
TXREFCLKN
TXREFCLKP
TXDGND
RESET
FGND
160
150
RX
140
130
120
110
100
TX
90
TOP VIEW
81
1-1014(F).r2
Figure 2. TA16-Type Transponder Pinout
Agere Systems Inc.
5
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