SLC-25-6-2L-TIL - Stratos Lightwave

SLC-25-6-X-TXL Optical Fibre Channel -- +3.3V

Small Form Factor (SFF) Transceiver -- 1.0625 GBaud

1180.01 PRELIMINARY

PRELIMINARY



PRODUCT OVERVIEW

The SLC-25-6-X-TXL Small Form Factor (SFF) optical

transceivers are high performance integrated duplex data

links for bi-directional communication over multimode or

single mode fiber. The SLC-25-6 module is specifically

designed to be used in multimode or single mode Fibre

Channel applications. The SLC-25-6 transceivers are

provided with the LC receptacle which is compatible with

the industry standard LC connector. The Stratos

Lightwave SFF transceivers measure 0.532 inches in

width. These transceivers provide double port densities by

fitting twice the number of transceivers into the same

board space as a 1x9 transceiver. This saves on system

costs and can reduce overall design time. The SLC-25-6-

X-TXL operates at +3.3V.

This optoelectronic transceiver module is a class 1 laser

product compliant with FDA Radiation Performance

Standards, 21 CFR Subchapter J. This component is also

class 1 laser compliant according to International Safety

Standard IEC-825-1.

SHORT WAVELENGTH LASER

The use of short wavelength VCSELs (Vertical Cavity

Surface-Emitting Laser) and high volume production

processes has resulted in a low cost, high performance

product available in various data transfer rates up to

1.0625 GBaud. The Stratos 1x Fiber Channel 850nm

SLC-25-6-1-TXL is compatible with legacy 850nm CD laser

Fiber Channel transmitter.

LONG WAVELENGTH LASER

The SLC-25-6-2-TXL is provided with single mode optics.

The 1300 nm laser provides highly reliable single mode

communications which meets or exceeds the Fibre

Channel distance requirements.

ABSOLUTE MAXIMUM RATINGS

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ORDERING INFORMATION

SLC - 25 - 6 - X - T X L

+3.3V POWER SUPPLY

GROUND CLIP

N - No Ground Clip

I - Individual Mount (.600 Center)

G - Gang Mount (.550 Center)

SIGNAL DETECT

T - TTL Output

WAVELENGTH

1 - 850 nm (multimode)

2 - 1300 nm (single mode)5km

2M - 1300nm (single mode)10km

2L - 1300nm (single mode) 20km

PROTOCOL

6 - Fibre Channel, 1.0625GBaud

3 - ATM OC-12, 622MBaud

4 - Gigabit Ethernet, 1.25GBaud

7 - ATM OC-48, 2.488GBaud

8 - Fibre Channel, 2.125GBaud

Optoelectronic Products

7444 West Wilson Avenue • Chicago, IL 60656

708/867-9600 • 800/323-6858 • Fax: 708/867-0996

email:optoinfo@stratoslightwave.com

http://www.stratoslightwave.com

Features

!1.0625 Gbps Fibre Channel Performance

!Die Cast Metal Housing

!TTL Signal Detect Output

!Transmitter Disable Input

!Low profile fits Mezzanine Card Applications

!50Ω AC coupled LVPECL Inputs/Outputs

!Single +3.3V Power Supply

!Wave Solderable / Aqueous Washable

!Class 1 Laser Safety Compliant

!UL 1950 Approved

1180.01 PRELIMINARY

SLC-25-6-X-TXL Optical Fibre Channel -- +3.3V

Small Form Factor (SFF) Transceiver -- 1.0625 GBaud



MODULE SPECIFICATIONS - ELECTRICAL Ta = 25° C, Vcc = +3.3 V

PERFORMANCE SPECIFICATIONS - OPTICAL 850 nm Laser Multimode Ta = 25° C, Vcc = +3.3 V

Note1 - This is the link length for at least 95% of the installed fiber base.

Note2 - Measured with 27 - 1 Pseudorandom bit sequence.

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RECOMMENDED OPERATING CONDITIONS

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1180.01 PRELIMINARY

SLC-25-6-X-TXL Optical Fibre Channel -- +3.3V

Small Form Factor (SFF) Transceiver -- 1.0625 GBaud



SLC-25-6-2-TXL PERFORMANCE SPECIFICATIONS - OPTICAL Ta=25°C, Vcc= +3.3V

SLC-25-6-2M-TXL PERFORMANCE SPECIFICATIONS - OPTICAL Ta=25°C, Vcc= +3.3V

SLC-25-6-2L-TXL PERFORMANCE SPECIFICATIONS - OPTICAL Ta=25°C, Vcc= +3.3V

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1180.01 PRELIMINARY

SLC-25-6-X-TXL Optical Fibre Channel -- +3.3V

Small Form Factor (SFF) Transceiver -- 1.0625 GBaud



Notes:

1. Consult the SERDES manufacturer’s applications information for biasing required for Tx outputs. Some serializer outputs are

internally biased and may not need external bias resistors.

2. Consult SERDES manufacturer’s data sheet and application data for appropriate receiver input biasing network.

TERMINATION CIRCUITS

Inputs to the SLC-25 transmitter are AC coupled and internally terminated through 50 ohms to AC ground. These

transceivers can operate with PECL logic level. The input signal must have at least a 350 mV peak-to-peak (single

ended) signal swing. Output from the receiver section of the module is also AC coupled and is expected to drive into a

50 ohm load. Different termination strategies may be required depending on the particular Serializer/Deserializer chip set

used.

The SLC-25 product family is designed with AC coupled data inputs and outputs to provide the following advantages:

!Close positioning of SERDES with respect to transceiver; allows for shorter line lengths and at

gigabit speeds reduces EMI.

!Minimum number of external components.

!Internal termination reduces the potential for unterminated stubs which would otherwise increase

jitter and reduce transmission margin.

Subsequently, this affords the customer the ability to optimally locate the SERDES as close to the SLC-25 as possible

and save valuable real estate on PCI cards and other small circuit assemblies. At gigabit rates this can provide a

significant advantage resulting in better transmission performance and accordingly better signal integrity.

AC coupling allows the Stratos Lightwave SLC-25 to be applied across a wider range of applications without modification.

This benefits users in terms of enhanced RF performance, reduced component count, tighter layout and fewer design

problems.

Figure 1 illustrates the recommended transmit and receive data line terminations and Figure 2 describes an alternative

termination approach. Figure 3 illustrates a Thevenin equivalent 50 ohm termination circuit for the SERDES receiver

input data lines, which require a +3.3V PECL termination. Other equivalent circuits can be readily calculated for other

bias voltages.

100 ohm

TTL logic level

See

Fig. 4

See

Fig. 5A

Figure 1. Recommended TRANSMIT and RECEIVE Data Terminations

1180.01 PRELIMINARY

SLC-25-6-X-TXL Optical Fibre Channel -- +3.3V

Small Form Factor (SFF) Transceiver -- 1.0625 GBaud



Figure 3. Thevenin Equivalent RECEIVE Data Terminations

Figure 2. Alternative TRANSMIT and RECEIVE Data Terminations

Notes:

1. Consult the SERDES manufacturer’s applications information for biasing required for Tx outputs. Some serializer outputs are

internally biased and may not need external bias resistors.

2. Consult SERDES manufacturer’s data sheet and application data for appropriate receiver input biasing network.

TTL logic level

See

Fig. 4

See

Fig. 5A

+3.3V

TTL logic level

See

Fig. 4

See

Fig. 5A

1180.01 PRELIMINARY

SLC-25-6-X-TXL Optical Fibre Channel -- +3.3V

Small Form Factor (SFF) Transceiver -- 1.0625 GBaud



POWER COUPLING

A suggested layout for power and ground connections is given in figure 5B below. Connections are made via separate

voltage and ground planes. The mounting posts are at case ground and should not be connected to circuit ground. The

ferrite bead should provide a real impedance of 50 to 100 ohms at 100 to 1000 MHz. Bypass capacitors should be

placed as close to the 10-pin connector as possible.

SIGNAL DETECT

The SLC-25 transceivers are equipped with TTL signal detect outputs. The TTL option eliminates the need for a PECL to

TTL level shifter in most applications. The SFF adhoc industry standard provides for a TTL level SIgnal Detect output.

Figure 5B. Suggested Power Coupling - Component Placement

Figure 4A. Suggested Power Coupling - Electrical Schematic

Figure 5A. Suggested Power Coupling - Electrical Schematic

Figure 4 . Signal Detect

1180.01 PRELIMINARY

SLC-25-6-X-TXL Optical Fibre Channel -- +3.3V

Small Form Factor (SFF) Transceiver -- 1.0625 GBaud



MECHANICAL DIMENSIONS – ( INDIVIDUAL MOUNT)

EMI and ESD CONSIDERATIONS

Stratos Lightwave optoelectronic transceivers offer a Die Cast Metal case and two types of chassis grounding clips

(Individual & Gang Mount). As shown in the drawing, both clips connect the module case to chassis ground when

installed flush through the panel cutout. The grounding clip in this way brushes the edge of the cutout in order to make a

proper contact. The use of a grounding clip also provides increased electrostatic protection and helps reduce radiated

emissions from the module or the host circuit board through the chassis faceplate. The attaching posts are at case

potential and may be connected to chassis ground. They should not be connected to circuit ground.

PANEL CUTOUT DIMENSIONS – ( INDIVIDUAL MOUNT)

Plastic optical subassemblies are used to further reduce the possibility of radiated emissions in multimode transceiver.

By providing a non-metal receptacle for the optical cable ferrule, the gigabit speed RF electrical signal is isolated from

the connector area thus preventing radiated energy leakage from these surfaces to the outside of the panel.

1180.01 PRELIMINARY

SLC-25-6-X-TXL Optical Fibre Channel -- +3.3V

Small Form Factor (SFF) Transceiver -- 1.0625 GBaud



10 x.018*

.700

.280

.620

.590

2x.040*

.070*

.386*

.014

SUGGESTED PCB LAND PATTERN

MECHANICAL DIMENSIONS – (GANG MOUNT)

1180.01 PRELIMINARY

SLC-25-6-X-TXL Optical Fibre Channel -- +3.3V

Small Form Factor (SFF) Transceiver -- 1.0625 GBaud



PHYSICAL DESCRIPTION

The SLC-25 features a compact design with a standard LC duplex connector for fiber optic connections. The 10-pin

connector (70 mil spacing) provides the electrical connection for all operation. With a height of 9.8 mm the SLC-25 fits

mezzanine card applications. An epoxy encapsulation provides excellent protection from environmental hazards and

assists in heat dissipation for all components. Two wave-solderable posts are provided for attaching the package to the

circuit board without the need for multiple attachment operations.

Optoelectronic Products

7444 West Wilson Avenue • Chicago, IL 60656

708/867-9600 • 800/323-6858 • Fax: 708/867-0996

email:optoinfo@stratoslightwave.com

http://www.stratoslightwave.com

IMPORTANT NOTICE

Stratos Lightwave reserves the right to make changes to or discontinue any optical link product or service identified in this publication, without

notice, in order to improve design and/or performance. Stratos Lightwave advises its customers to obtain the latest version of the publications

to verify, before placing orders, that the information being relied on is current. Stratos Lightwave Small Form Factor (SFF) products are covered

under U.S. Patent Numbers 5,812,582 and 5,864,468.

Stratos Lightwave warrants performance of its optical link products to current specifications in accordance with Stratos Lightwave standard

warranty. Testing and other quality control techniques are utilized to the extent that Stratos Lightwave has determined it to be necessary to

support this warranty. Specific testing of all parameters of each optical link product is not necessarily performed on all optical link products.

Stratos Lightwave products are not designed for use in life support appliances, submarines, military, flight hardware, devices, or systems

where malfunction of a Stratos Lightwave product can reasonably be expected to result in a personal injury. Stratos Lightwave customers

using or selling optical link products for use in such applications do so at their own risk and agree to fully indemnify Stratos Lightwave for any

damages resulting from such improper use or sale.

Stratos Lightwave assumes no liability for Stratos Lightwave applications assistance, customer product design, software performance, or

infringement of patents or services described herein. Nor does Stratos Lightwave warrant or represent that a license, either expressed or

implied is granted under any patent right, copyright, or intellectual property right , and makes no representations or warranties that these

products are free from patent, copyright, or intellectual property rights.

Applications that are described herein for any of the optical link products are for illustrative purposes only. Stratos Lightwave makes no

representation or warranty that such applications will be suitable for the specified use without further testing or modification.

ELECTRICAL INTERFACE, PIN DESCRIPTIONS

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