CT2-ML2LBCW61C3 - JDS Uniphase

COMMUNICATIONS MODULES & SUBSYSTEMS

Key Features • SFP MSA compatible

• 2.5 Gb/s compliant CWDM performance for short haul

and long haul

• Microprocessor-based design fully implements the Digital

Diagnostic Monitoring Interface

• Automatic output power and extinction ratio control over

temperature and lifetime to compensate for laser efficiency

degradation

• Both PIN and APD versions meet -27 dB receiver reflectance

• Optical parameters tuned and optimized over temperature

in production test

The JDSU CT2 Series 2.5 Gb/s Coarse Wavelength Division Multiplexing

(CWDM) transceiver integrates optics and electronics in a Small Form Factor

Pluggable (SFP) package. It is Multisource Agreement (MSA) compatible and

designed for CWDM operation per ITU-T G.695 for unidirectional 8 channel

black-link transmission (S-C8S1-1DX and S-C8L1-1DX). Although optimized

for 2.5 Gb/s, the CT2 provides multi-rate capabilities and can be used for various

protocols ranging from OC-3 (155 Mb/s) up to 2.7 Gb/s including 622 Mb/s,

1x/2x FC, GbE and 2x GbE.

The CT2 Series CWDM SFP transceiver provides a fully G.695 8 channel black-

link compliant interface between the optical Mux/Demux photonic layer and the

electrical layer. Its microprocessor-based modular design implements all features

specified in the SFP MSA compatible 2-wire Serial Digital Diagnostic Monitoring

Interface for Optical Transceivers.

The major components in this module include an uncooled distributed feedback

(DFB) based optical transmitter, a PIN or APD based optical receiver with

integrated transimpedence amplifier (TIA), an APD high voltage circuit (if

required), a microprocessor, a limiting post amplifier, and a laser driver. This

CWDM transceiver design offers a "hot-pluggable" interface and is available in

short haul (40 km, PIN) and long haul (80 km, APD) configurations.

Applications

• Metro access

•Metro core

• Wide area networks

• Optical crossconnects

Compliance

• GR-253-CORE

• ITU-T G.957

• SFF-8472 Revision 9.3

• ITU-T G.695

2.5 Gb/s CWDM SFP Transceiver (Multirate)

CT2 Series

NORTH AMERICA:800 498-JDSU (5378) WEBSITE:www.jdsu.comWORLDWIDE:+800 5378-JDSU

2.5 GB/S CWDM SFP TRANSCEIVER

Dimensions Diagram (Specifications in mm unless otherwise noted; see dimensions table on next page.)

K REF

J MIN

F REF

Section A-A

L MIN X 45°

Y MAX

BG REF

H MAX

R MAX

Y MAX

X REF

See Detail Y

Detail Y

AE REF

Section Z-Z

AA REF

AB MAX

2.5 GB/S CWDM SFP TRANSCEIVER

Dimension Table for the CT2

Designator Dimension Tolerance Comments

A 13.7 mm ±0.1 mm Transceiver width, nose piece or front that extends inside cage

B 8.6 mm ±0.1 mm Transceiver height, front, that extends inside cage

C 8.5 mm ±0.1 mm Transceiver height, rear

D 13.4 mm ±0.1 mm Transceiver width, rear

E 1.0 mm Maximum Extension of front sides outside of cage

F 2.3 mm Reference Location of cage grounding springs from centerline, top

G 4.2 mm Reference Location of side cage grounding springs from top

H 2.0 mm Maximum Width of cage grounding springs

J 28.5 mm Minimum Location of transition between nose piece and rear of transceiver

K 55.0 mm Reference Transceiver overall length

L 1.1 mm x 45° Minimum Chamfer on bottom of housing

M 2.0 mm ±0.25 mm Height of rear shoulder from transceiver printed circuit board

N 2.25 mm ±0.1 mm Location of printed circuit board to bottom of transceiver

P 1.0 mm ±0.1 mm Thickness of printed circuit board

Q 9.2 mm ±0.1 mm Width of printed circuit board

R 0.7 mm Maximum Width of skirt in rear of transceiver

S 45.0 mm ±0.2 mm Length from latch shoulder to rear of transceiver

T 34.6 mm ±0.3 mm Length from latch shoulder to bottom opening of transceiver

U 41.8 mm ±0.15 mm Length from latch shoulder to end of printed circuit board

V 2.7 mm ±0.05 mm Length from latch shoulder to shoulder of transceiver outside of cage

(location of positive stop)

W 2.7 mm ±0.1 mm Clearance for actuator tines

X 7.3 mm Reference Transceiver length extending outside of cage

Y 2.0 mm Maximum Maximum length of top and bottom transceiver extending outside of cage

Z 0.45 mm ±0.05 mm Height of latch boss

AA 8.6 mm Reference Transceiver height, front, that extends inside the cage

AB 2.6 mm Maximum Length of latch boss

AE 6.0 mm Reference Width of cavity that contains the actuator

Bail Latch Color Code Definition

Bail Latch Color Wavelength Typical Reach

Gray 1471 nm Short haul/Long haul

Violet 1491 nm Short haul/Long haul

Blue 1511 nm Short haul/Long haul

Green 1531 nm Short haul/Long haul

Yellow 1551 nm Short haul/Long haul

Orange 1571 nm Short haul/Long haul

Red 1591 nm Short haul/Long haul

Brown 1611 nm Short haul/Long haul

2.5 GB/S CWDM SFP TRANSCEIVER

CT2 Electrical Pad Layout

VeeT

VeeR

VccR

VccT

TD-

TD+

RD+

RD-

VeeT

VeeR

LOS

Tx Fault

Tx Disable

MOD-DEF(2)

MOD-DEF(1)

MOD-DEF(0)

Rate Select

Top of Board Bottom of Board (As Viewed

through Top of Board)

Transceiver Pin Descriptions

Pin Description

TD Un-clocked, multirate, differential serial bit stream (155 Mb/s to 2.7 Gb/s) used to drive the optical transmitter.

TDb Internally AC coupled and terminated via internal 100 Ωdifferential impedence.

RD Differential received electrical signal capable of detecting 155 Mb/s to 2.7 Gb/s bit patterns.

RDb The differential pair is internally biased and AC coupled. This signal requires 100 Ωexternal differential termination.

Rate_select Internally monitored and available for future use. Can be customized for specific applications.

TxDIS Transmitter Disable Input. A logic HIGH on this input pin disables the transmitter's laser so that there is no optical

output. If left open the transmitter will be disabled.

LOS Loss of Signal (Open Collector). A logic HIGH on this output indicates an incoming signal level that is less than -25 dBm

but no greater than -31 dBm for the 40 km configuration and less than -34 dBm but no greater than -40 dBm for the

80 km configuration. LOS shall deassert (logic LOW) when a 3 dB (maximum), 0.5 dB (minimum) hysteresis is obtained.

Tx_fault Transmitter fault (Open collector). A logic HIGH indicates that the transmitter is in a fault condition.

MOD_DEF(0) MOD_DEF(0) is internally grounded to indicate the presence of the module. Must be pulled-up on host board with

10 KΩresistor.

MOD_DEF(1) MOD_DEF(1) is the clock of the 2 wire interface for module monitoring.

MOD_DEF(2) MOD_DEF(2) is the data line of the 2 wire interface for module monitoring.

VccR,VccT Receiver, Transmitter power supply, respectively

VeeR, VeeT Receiver, Transmitter ground, respectively. The chassis ground and circuit ground isolation is configurable.

2.5 GB/S CWDM SFP TRANSCEIVER

Absolute Maximum Ratings

Parameter Minimum Maximum

Standard operating case temperature range 0 °C 70 °C

Extended operating case temperature range -5 °C 85 °C

Storage case temperature range -40 °C 85 °C

Supply voltage -0.5 V 4.0 V

Voltage on any input/output pin 0 V Vcc

High-speed output source current - 50 mA

Lead soldering temperature/time - 250 °C/10 seconds

Operating relative humidity (non-condensing) 5% 85%

Receiver optical input power

PIN - 3 dBm

APD - 0 dBm

Transceiver Electrical Input/Output Characteristics

Parameter Minimum Maximum

Input data signal levels input voltage swing, DVIN (internally AC coupled) 200 mV 2000 mV

Transmitter disable input (disabled/enabled) 2.0 V/0 V Vcc/0.8 V

Rate select input (high data rate/low data rate) 2.8 V/0 V Vcc/0.6 V

Transmitter fault output (asserted/deasserted) 2.4 V/0 V Vcc/0.5 V

Output data signal levels1 output voltage swing, DVOUT (internally AC coupled) 400 mV 2000 mV

Loss-of-signal output (output high, VOH/output low, VOL) 2.4 V/0 V Vcc/0.5 V

1. Terminated into 100 Ωdifferential. These levels are guaranteed down to 2 dB lower than the typical receiver sensitivity for each data rate and reach.

(Vcc = 3.3 V±5%)

2.5 GB/S CWDM SFP TRANSCEIVER

Timing of Status and Control Input/Output

Parameter Symbol Condition Specification

TX_DISABLE assert time t_off Time from rising edge of TX_DISABLE to when the Maximum 10 µs

output optical power falls below 10% of nominal

TX_DISABLE deassert time t_on Time from falling edge of TX_DISABLE to when the Maximum 1 ms

output optical power rises above 90% of nominal

Time to initialize t_init Upon power up or negation of TX_FAULT due to TX_DISABLE Maximum 300 ms

TX_FAULT assert time t_fault Time from a fault condition to TX_FAULT assertion Maximum 100 µs

TX_DISABLE for reset t_reset Time TX_DISABLE must be held HIGH to reset TX_FAULT Minimum 10 µs

LOS assert time t_loss_on Time from loss of signal to assertion of LOS Maximum 100 µs

LOS deassert time t_loss_off Time from non-loss condition to LOS deassertion Maximum 100 µs

2-wire serial clock rate f_serial_clock - Maximum 100 kHz

Power Supply Voltage

Parameter Short Haul (40 km, PIN) Long Haul (80 km, APD)

Supply voltage Minimum 3.1 V 3.1 V

Typical 3.3 V 3.3 V

Maximum 3.5 V 3.5 V

Power supply current drain1Typical 275 mA 285 mA

Maximum 320 mA 350 mA

1. Applies to hardware revision 2. Does not include output termination resistor current.

2.5 GB/S CWDM SFP TRANSCEIVER

Optical Specifications

Parameter 40 km (PIN) at OC-48 80 km (APD) at OC-48

Average output power1Minimum 0 dBm 0 dBm

Typical 1.5 dBm 1.5 dBm

Maximum 4 dBm 4 dBm

BOL power output1Minimum 0.5 dBm 0.5 dBm

Typical 1.5 dBm 1.5 dBm

Maximum 3 dBm 3 dBm

TX operating wavelength Minimum -6.5 nm -6.5 nm

Typical Center Center

Maximum 6.5 nm 6.5 nm

Spectral width2Typical 0.3 nm 0.3 nm

Maximum 1 nm 1 nm

Side mode suppression ratio (DFB laser)3Minimum 30 dB 30 dB

Extinction ratio4(BOL) Minimum 9.0 dB 9 dB

Typical 10.0 dB 10 dB

Maximum 11.5 dB 11.5 dB

Extinction ratio4(EOL) Minimum 8.2 dB 8.2 dB

Maximum 12.0 dB 12.0 dB

Optical rise and fall times (20 to 80%)5Maximum 200 ps 200 ps

Eye mask of optical output Compliant with GR-253 Compliant with GR-253

and ITU-T G.957 and ITU-T G.957

Eye mask margin (filtered) Minimum 10% 10%

Typical 15% 15%

Jitter generation (peak-to-peak)6Maximum 70 mUIP-P 70 mUIP-P

Jitter generation (rms)6Maximum 7 mUIrms 7 mUIrms

Power output with transmitter disabled Typical -50 dBm -50 dBm

Maximum -40 dBm -40 dBm

Receiver sensitivity (BOL, BER=1 x 10-10, ER=10 dB) Minimum -21 dBm -30 dBm

Typical -23 dBm -32 dBm

Receiver sensitivity (EOL, BER=1 x 10-10, ER=8.2 dB) Minimum -18 dBm -28 dBm

Maximum received optical power Minimum 0 dBm -8 dBm

Link status response time Minimum 3 µs 3 µs

Typical 50 µs 50 µs

Maximum 100 µs 100 µs

Optical path penalty Maximum 1.5 dB 2.5 dB

Dispersion Maximum 1000 ps/nm 1600 ps/nm

Receiver reflectance Maximum -27 dB -27 dB

Minimum optical return loss Minimum -24 dB -24 dB

BER floor Maximum 10-15 10-15

Reflect into Tx for <1 dB degradation at the receiver Maximum -24 dB -24 dB

Bit rate 155 to 2700 Mb/s 155 to 2700 Mb/s

1. Fiber coupled power, connector repeatability is ±1 dB.

2. Full spectral width measured 20 dB down from the central wavelength peak under fully modulated conditions (for DFB lasers).

3. Ratio of the average output power in the dominant longitudinal mode to the power in the most significant side mode under fully modulated conditions.

4. Ratio of logic 1 output power to logic 0 output power under fully modulated conditions. When operated at data rates below 1 Gb/s, the maximum extinction ratio

specification is increased by 2 dB.

5. Using an unfiltered measurement.

6. Formatted OC-48 pattern with scrambled PRBS 23 payload using Agilent Omni BER as the optical source driving an external OC-48 optical receiver with CDR. The

differential data outputs of this optical receiver with CDR. The differential dataoutputs of this optical receiver are used as the electrical inputs for the CT2 transmitter which

optically drives the Omni BER receiver input.

NORTH AMERICA:800 498-JDSU (5378) WEBSITE:www.jdsu.comWORLDWIDE:+800 5378-JDSU

Telcordia is a registered trademark of Telcordia Technologies Incorporated.

All statements, technical information and recommendations related to the products herein are based upon information believed to be

reliable or accurate. However, the accuracy or completeness thereof is not guaranteed, and no responsibility is assumed for any

inaccuracies. The user assumes all risks and liability whatsoever in connection with the use of a product or its application. JDSU reserves

the right to change at any time without notice the design, specifications, function, fit or form of its products described herein, includ-

ing withdrawal at any time of a product offered for sale herein. JDSU makes no representations that the products

herein are free from any intellectual property claims of others. Please contact JDSU for more information. JDSU and the JDSU logo are

2.5 GB/S CWDM SFP TRANSCEIVER

Ordering Information

For more information on this or other products and their availability, please contact your local JDSU account manager or

JDSU directly at 1-800-498-JDSU (5378) in North America and +800-5378-JDSU worldwide or via e-mail at

customer.service@jdsu.com.

Sample: CT2-MI2LBCW13C2

Code Custom Options

(Output Power/

Dispersion/Channel

Spacing)3

CStandard

Code Hardware Revision

1 Hardware revision 1,

long haul wide body

2 Hardware revision 2,

short haul wide body

3 Hardware revision 3,

narrow body high

desity bail latch

4 Hardware revision 4,

narrow body top-down

bail latch

1. Fully G.695 compliant at 2.5 Gb/s

2. Per GR-253-Core

3. Customer specific options

available upon request

Code Format/ITU Channel/

Wavelength

CW1 CWDM Channel 1 (1471 nm)

CW2 CWDM Channel 2 (1491 nm)

CW3 CWDM Channel 3 (1511 nm)

CW4 CWDM Channel 4 (1531 nm)

CW5 CWDM Channel 5 (1551 nm)

CW6 CWDM Channel 6 (1571 nm)

CW7 CWDM Channel 7 (1591 nm)

CW8 CWDM Channel 8 (1611 nm)

Code Software Feature Set

1Software release 1, long haul

3Software release 3, short haul

YStandard TX fault operation,

no DDM interface,page

AO only

Code Connector/

Pigtail Length

LLC duplex

Code Temperature Range/

Package

A0 to 70 °C case temperature

B-5 to 75 °C case temperature

D-5 to 80 °C case temperature

F-5 to 85 °C case temperature

Code Rate

M2.5 Gb/s (multirate)1

Code Reach2

I2 Short haul (40 km, PIN)

L2 Long haul (80 km, APD)

CT2- ML