Advance Data Sheet
July 2000
CA16-Type 2.5 Gbits/s
Translight
™
DWDM Transponder with
16-Channel 155 Mbits/s Multiplexer/Demultiplexer
s
Multiple alarms:
— Loss of signal.
— Loss of reference clock.
— Loss of framing.
— Laser degrade alarm.
Applications
s
Telecommunications
— Inter- and intraoffice SONET/SDH
— Subscriber loop
— Metropolitan area networks
High-speed data communications
s
The
Translight
Transponders integrate up to 15 discrete
ICs and optical components, including a 2.5 Gbits/s
optical transmitter and receiver pair, all in a single,
compact package.
Description
The CA16-type transponder performs the parallel-to-
serial-to-optical transport and optical transport-to-
serial-to-parallel function of the section and photonic
layers of the SONET/SDH protocol. The CA16 trans-
mitter section performs the bit serialization and opti-
cal transmission of SONET/SDH OC-48/STM-16
data that has been formatted into standard SONET/
SDH compliant 16-bit parallel format. The CA16
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.
The CA16 transponder does not perform byte-level
multiplexing or interleaving.
Features
s
2.5 Gbits/s optical transmitter and receiver with
16-channel 155 Mbits/s multiplexer/demultiplexer.
Available with 1.55
µ
m cooled DFB laser transmit-
ter and an APD receiver for long-reach applica-
tions.
— Offers 45 standard ITU wavelengths with
100 GHz spacing.
— Each module is capable of two wavelengths
under user control.
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.
Transmitter laser disable input.
Line loopback and diagnostic loopback capability.
s
s
s
s
s
s
s
s
CA16-Type 2.5 Gbits/s
Translight
DWDM Transponder with
16-Channel 155 Mbits/s Multiplexer/Demultiplexer
Advance Data Sheet
July 2000
Table of Contents
Contents
Page
Tables
Page
Features ................................................................... 1
Applications .............................................................. 1
Description ............................................................... 1
Absolute Maximum Ratings ...................................... 3
Block Diagram........................................................... 4
Pin Information ......................................................... 5
Pin Descriptions ....................................................... 6
Functional Description ........................................... 12
Receiver ............................................................ 12
Transmitter ........................................................ 12
Loopback Modes ............................................... 13
Transponder Interfacing ..................................... 13
Optical Characteristics ........................................... 15
Electrical Characteristics ........................................ 16
Timing Characteristics ........................................... 18
Transmitter Data Input Timing ........................... 18
Input Timing Mode 1 .......................................... 19
Input Timing Mode 2 .......................................... 20
Forward Clocking ............................................... 21
PC
LK
-to PIC
LK
Timing ........................................ 22
PHERR/PHINIT .................................................. 23
Receiver Framing ............................................... 25
Wavelength Selection ............................................. 26
Qualification and Reliability .................................... 27
Laser Safety Information ....................................... 27
Class I Laser Product ......................................... 27
Electromagnetic Emissions and Immunity ......... 27
Outline Diagram ..................................................... 28
Ordering Information .............................................. 29
Table 1. CA16-Type Transponder Input Pinout ........ 6
Table 2. CA16-Type Transponder Input Pin
Descriptions.............................................. 10
Table 3. CA16-Type Transponder Output Pin
Descriptions.............................................. 11
Table 4. OC-48/STM-16 Transmitter Optical
Characteristics ......................................... 15
Table 5. OC-48/STM-16 Receiver Optical
Characteristics ......................................... 15
Table 6. Power Supply Characteristics .................... 16
Table 7. Transmitter Electrical I/O Characteristics... 16
Table 8. Receiver Electrical I/O Characteristics ...... 17
Table 9. Transmitter ac Timing Characteristics ....... 24
Table 10. Receiver ac Timing Characteristics ......... 24
Table 11. Ordering Information ................................ 29
Figures
Page
Figure 1. CA16-Type Transponder Block Diagram.... 4
Figure 2. CA16-Type Transponder Pinout ................. 5
Figure 3. Transponder Interfacing............................ 13
Figure 4. Interfacing to the T
X
R
EF
C
LK
Input ............ 14
Figure 5. Block Diagram Timing Mode 1.................. 19
Figure 6. Block Diagram Timing Mode 2.................. 20
Figure 7. Forward Clocking of the
CA16 Transponder .................................. 21
Figure 8. PC
LK
-to PIC
LK
Timing............................... 22
Figure 9. PHERR/PHINIT Timing............................. 23
Figure 10. ac Input Timing ....................................... 24
Figure 11. Receiver Output Timing Diagram ........... 24
Figure 12. Frame and Byte Detection ...................... 25
Figure 13. OOF Timing (FRAMEN = High) .............. 25
Figure 14. FRAMEN Timing..................................... 26
2
Lucent Technologies Inc.
Advance Data Sheet
July 2000
CA16-Type 2.5 Gbits/s
Translight
DWDM Transponder with
16-Channel 155 Mbits/s Multiplexer/Demultiplexer
The optical transmitter is available at any ITU grid
wavelength with a 1.55
µm
cooled DFB laser for long-
reach applications. The optical output signal is SONET
and ITU compliant for OC-48/STM-16 applications as
shown in Table 4, OC-48/STM-16 Transmitter Optical
Characteristics.
In the receive direction, the transponder module
receives a 2488.32 Mbits/s optical signal and converts
it to an electrical signal, and then extracts a clock sig-
nal and demultiplexes the data into sixteen 155 Mbits/s
differential LVPECL data signals. When enabled, the
module can also detect SONET/SDH frame bound-
aries. The optical receiver is available with an APD
photodetector. The receiver operates over the wave-
length range of 1.1
µm
to 1.6
µm
and is fully compliant
to SONET/SDH OC-48/STM-16 physical layer specifi-
cations as shown in Table 5, OC-48/STM-16 Receiver
Optical Characteristics.
Description
(continued)
Figure 1 shows a simplified block diagram of the CA16-
Type transponder. This device is a bidirectional module
designed to provide a SONET or SDH compliant elec-
tro-optical interface between the SONET/SDH photonic
physical layer and the electrical section layer. The mod-
ule contains a wavelength-tunable (two channels at
100 GHz) 2.5 Gbits/s optical transmitter and a
2.5 Gbits/s optical receiver in the same physical pack-
age along with the electronics necessary to multiplex
and demultiplex sixteen 155 Mbits/s electrical chan-
nels. Clock synthesis, clock recovery, and SONET/SDH
frame detection circuits are also included within the
module.
In the transmit direction, the transponder module multi-
plexes sixteen 155 Mbits/s PECL electrical data signals
into an optical signal at 2488.32 Mbits/s for launching
into optical fiber. An internal 2.488 GHz reference oscil-
lator is phase-locked to an external 155.52 MHz data
timing reference.
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
Minimum Fiber Bend Radius
1. Human body model.
Symbol
T
C
T
S
—
—
—
ESD
RH
P
IN
—
Min
0
–40
–0.5
0
—
—
—
—
1.25 (31.8)
Max
65
85
5.5
V
CC
50
500
85
0
—
Unit
°
C
°
C
V
—
mA
V
%
dBm
in. (mm)
Lucent Technologies Inc.
3
CA16-Type 2.5 Gbits/s
Translight
DWDM Transponder with
16-Channel 155 Mbits/s Multiplexer/Demultiplexer
Advance Data Sheet
July 2000
Block Diagram
WS (WAVELENGTH
SELECT)
TXDIS
WDEA
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)
Figure 1. CA16-Type Transponder Block Diagram
4
Lucent Technologies Inc.
Advance Data Sheet
July 2000
CA16-Type 2.5 Gbits/s
Translight
DWDM Transponder with
16-Channel 155 Mbits/s Multiplexer/Demultiplexer
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
VTEC
VTEC
VTEC
RXDGND
RXAGND
RXAGND
RX3.3A
RXAGND
RXAGND
NC
RX3.3D
RX3.3D
RXDGND
FRAMEN
FP
WDEA
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
VTEC
VTEC
WS
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).d
Figure 2. CA16-Type Transponder Pinout
Lucent Technologies Inc.
5
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