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www.DataSheet.co.kr SLC-25-8-1-X Optical 2x FC/GbE/1x FC -- +3.3V
SFF 2x5 Transceiver -- 2.125/1.25/1.0625 GBaud
ORDERING INFORMATION
SLC - 25 - 8 - 1 - X
GROUNDING CLIP
N = No Clip
E = Individual Clip (0.600" center)
K = Ext. Individual Clip (0.600" center)
G = Gang Mount Clip (0.550" center )
WAVELENGTH
1 = 850nm (Multimode)
PROTOCOL
8 = 2x FC/GbE/1x FC;
2.125/1.25/1.0625 GBaud
Features
„ 2.125 Gbps Fibre Channel Compliant
„ 1.25 Gbps Gigabit Ethernet compliant
„ 1.0625 Gbps Fibre Channel compliant
„ Die Cast Metal Package
„ TTL Signal Detect Output
„ Transmitter Disable Input
„ Low profile fits Mezzanine Card Applications
„ 100differential AC coupled CML level Outputs
„ Single +3.3V Power Supply
„ Wave Solderable / Aqueous Washable
„ Class 1 Laser Safety Compliant
„ UL 1950 Approved
PRODUCT OVERVIEW
The SLC-25-8-1-X Small Form Factor (SFF) optical
transceivers are high performance integrated duplex
data links for bi-directional communication over
multimode fiber. The SLC-25-8-1-X module is
specifically designed to be used in multi mode Fibre
Channel applications with data rate up to 2.125GBaud.
The SLC-25-8-1-X 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.
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.
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
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
2.125GBaud.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
MIN
MAX
UNITS NOTES
Storage Temperature
Ts tg
-50 +100
°C
Soldering Temperature
260 ºC 10 seconds on leads only
Supply Voltage
Data AC Voltage
VCCT, VCCR
Tx+, Tx-
6.0 V VCC - ground
2.6 Vpp Differential
Data DC Voltage
Tx+, Tx-
-10 10.0 Vpk V (Tx+ or Tx-) - ground
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
Operating Case Temperature
Tc
Supply Voltage
Vcc
Baud Rate
Brate
MIN
-5
+3.0
1.0625
TYP
+3.3
MAX
+80
+3.6
2.125
UNITS
°C
VDC
GBaud
NOTES
1.0625/1.25/2.125GBaud
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SLC-25-8-1-X Optical 2x FC/GbE/1x FC -- +3.3V
SFF 2x5 Transceiver -- 2.125/1.25/1.0625 GBaud
MODULE SPECIFICATIONS - ELECTRICAL
PARAMETER
Supply Current
SYMBOL MIN
Icc
TRANSMITTER
CML/PECL Inputs (Differential)
400
Input Impedance
Zin 85
TX_DISABLE input Voltage - HIGH
TX_DISABLE input Voltage - LOW
RECEIVER
CML Outputs (Differential)
VIH
VIL
2.0
0
400
Output Impedance (Differential) Zin
90
Total Jitter
TJ
TTL Signal Detect Output - LOW
TTL Signal Detect Output - HIGH
2.4
-5ºC<Tc<+80ºC; +3.0<Vcc<+3.6V
TYP MAX UNITS NOTES
150 200 mA -5ºC<Tc<+80ºC; +3.0V<Vcc<+3.6V
2500 mVpp AC coupled inputs
100 115 ohms
Vcc+0.3 V
0.8 V
600 1000 mVpp AC coupled outputs
100 110 ohms
75 ps
Mesured with 27 -1 PRBS @ 2.125GBaud
130 ps
Mesured with 27 -1 PRBS @ 1.25/1.0625GBaud
0.8 V
IOL= -1.6mA, 1 TTL unit load
3 V IOH= 40µA, 1 TTL unit load
SLC-25-8-1-XX OPTICAL SPECIFICATIONS - 8500 nm Multimode Laser
-5ºC<Tc<+80ºC; +3.0<Vcc<+3.6V
PARAMETER
SYMBOL MIN TYP MAX UNITS NOTES
50µm Core Diameter MMF
300 500
550 1000
m BER<1.0E-12 @ 2.125GBaud
m BER<1.0E-12 @ 1.25/1.0625GBaud
62.5µm Core Diameter MMF
200 300
300 500
m BER<1.0E-12 @ 2.125GBaud
m BER<1.0E-12 @ 1.25/1.0625GBaud
TRANSMITTER
Optical Center Wavelength
Spectral Width
Optical Transmit Power
λ
∆λ
Popt
830 850 860 nm
0.85 nm RMS
-9.5 -2¹ dBm Average @ 850nm
Optical Modulation Amplitude OMA
225
µW pk-pk
Extinction Ratio
ER 9
dB P1/P0
Relative Intensity Noise
RIN
-117 dB/Hz
Total Jitter
TJ
85 ps Mesured with 27 -1 PRBS @ 2.125GBaud
170 ps Mesured with 27 -1 PRBS @ 1.25/1.0625GBaud
Output Rise/Fall Time
tR, tF
160 ps 20-80%; measured unfiltered @ 2.125GBaud
260 ps 20-80%; measured unfiltered @ 1.25/1.0625GBaud
RECEIVER
Optical Input Wavelength
Optical Input Power
λ
Pr
770
-17
860 nm
0 dBm BER<1.0E-12 @ 2.125/1.25/1.0625GBaud
Optical Modulation Amplitude OMA
31
µw pk-pk @ 2.125/1.25/1.0625GBaud
Optical Return Loss
ORL
12
dB
Signal Detect - Asserted
Pa
-17 dBm Measured on transition - Low to High
Signal Detect - Deasserted Pd
-29
dBm Measured on transition - High to Low
Signal Detect - Hysteresis Pa-Pd
1.5 5.0
dB
Note1: Lessor of Class 1 Laser Safety Limits (CDRH or EN 60825) or Receiver power, max.
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SLC-25-8-1-X Optical 2x FC/GbE/1x FC -- +3.3V
SFF 2x5 Transceiver -- 2.125/1.25/1.0625 GBaud
TERMINATION CIRCUITS
Inputs to the SLC-25-8-1-X transmitter are AC coupled and internally terminated with 100ohms differential. These
transceivers can operate with CML or PECL logic level. The input signal must have at least a 400 mV peak-to-peak
(differential) signal swing. Output from the receiver section of the module is CML level 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 in-
crease 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 modifica-
tion. 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 receiverinput data lines, which require a +3.3V CML termination. Other equivalent circuits can be readily
calculated for other bias voltages.
8 TTL logic level
7
9 Z=50
10
Z=50
6
See
2 Fig. 5A&B
3
See
Fig. 4
4 Z=50
5 Z=50
1
270
270
100
Figure 1. Recommended 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.
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SLC-25-8-1-X Optical 2x FC/GbE/1x FC -- +3.3V
SFF 2x5 Transceiver -- 2.125/1.25/1.0625 GBaud
8 TTL logic level
7
9 Z=50
10
Z=50
6
See
2 Fig. 5A&B
3
See
Fig. 4
4 Z=50
5 Z=50
1
270
270
50
50
Figure 2. Alternative TRANSMIT and RECEIVE Data Terminations
8 TTL logic level
7
9 Z=50
10
Z=50
6
See
2 Fig. 5A&B
3
See
Fig. 4
4 Z=50
5 Z=50
1
270
270
+3.3V
8282
130
130
Figure 3. Thevenin Equivalent 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.
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SLC-25-8-1-X Optical 2x FC/GbE/1x FC -- +3.3V
SFF 2x5 Transceiver -- 2.125/1.25/1.0625 GBaud
SIGNAL DETECT
The SLC-25-8-1-X 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 4. Signal Detect
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 220ohms at 100MHz. Bypass capacitors should be
placed as close to the 10-pin connector as possible.
L2
2
6 L1
C1 C2
Vcc
C3 + C4
Values:
C1, C2 = 1000pF, COG
C3 = 0.1µF
C4 = 10µF, Tantilum
L1, L2 = Real Impedence of 220@ 100MHz
Figure 5A. Suggested Power Coupling - Electrical Schematic
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Values:
C1, C2 = 1000pF, COG
C3 = 0.1µF
C4 = 10µF, Tantilum
L1, L2 = Real Impedence of 220
@ 100MHz
Note:
(1) Components shown are placed
on the bottom layer and are
viewed through the board.
LEGEND:
Vcc Plane Connection
Circuit Ground Connection
Case Ground
Figure 5B. Suggested Power Coupling - Component Placement
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