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CA16A2CNN

CA16-Type 2.5 Gbits/s DWDM Transponder with 16-Channel 155 Mbits/s Multiplexer/Demultiplexer

Agere -> LSI Corporation 

Advance Data Sheet

March 2001

CA16-Type 2.5 Gbits/s DWDM Transponder with

16-Channel 155 Mbits/s Multiplexer/Demultiplexer

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 channels.

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.

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-16Transmitter 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.

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 Voltage1

Relative Humidity (noncondensing)

Receiver Optical Input Power—Biased APD

Minimum Fiber Bend Radius

1. Human body model.

Symbol

TC

TS

—

—

—

ESD

RH

PIN

—

Min

0

–40

–0.5

0

—

—

—

—

1.25 (31.8)

Max

75

85

5.5

VCC

50

500

85

0

—

Unit

°C

°C

V

—

mA

V

%

dBm

in. (mm)

Agere Systems Inc.

3

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