Pluggable SFP Transceiver
1.25G 1310 20KM
Product Features
Up to 1.25Gb/s dual data links
Hot-pluggable SFP footprint
1310nm FP laser transmitter
Duplex LC connector
Up to 20km on 9/125µm SMF
Metal enclosure for lower EMI
Single +3.3V power supply
Low power dissipation <700mW
Commercial operating temperature range: -40°C to +85°C
Applications
1.25Gb/s 1000Base-LX Ethernet
1.06 Gb/s Fibre Channel
General
Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). They simultaneously comply with Gigabit Ethernet as specified in IEEE STD 802.3 and 1x Fibre Channel as defined in FC-PI-2 Rev. 10.0 .They are RoHS compliant and lead-free.
I. Pin Descriptions
Pin Symbol Name/Description Ref.
1 VeeT Transmitter Ground (Common with Receiver Ground) 1
2 TX Fault Transmitter Fault.
3 TX Disable Transmitter Disable. Laser output disabled on high or open. 2
4 MOD_DEF(2) Module Definition 2. Data line for Serial ID. 3
5 MOD_DEF(1) Module Definition 1. Clock line for Serial ID. 3
6 MOD_DEF(0) Module Definition 0. Grounded within the module. 3
7 Rate Select No connection required
8 LOS Loss of Signal indication. Logic 0 indicates normal operation. 4
9 VeeR Receiver Ground (Common with Transmitter Ground) 1
10 VeeR Receiver Ground (Common with Transmitter Ground) 1
11 VeeR Receiver Ground (Common with Transmitter Ground) 1
12 RD- Receiver Inverted DATA out. AC Coupled
13 RD+ Receiver Non-inverted DATA out. AC Coupled
14 VeeR Receiver Ground (Common with Transmitter Ground) 1
15 VccR Receiver Power Supply
16 VccT Transmitter Power Supply
17 VeeT Transmitter Ground (Common with Receiver Ground) 1
18 TD+ Transmitter Non-Inverted DATA in. AC Coupled.
19 TD- Transmitter Inverted DATA in. AC Coupled.
20 VeeT Transmitter Ground (Common with Receiver Ground) 1
Notes:
1. Circuit ground is internally isolated from chassis ground.
2. Laser output disabled on TX Disable >2.0V or open, enabled on TX Disable<0.8V.
3. Should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V.
MOD_DEF(0) pulls line low to indicate module is plugged in.
4. LOS is LVTTL output. Should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.
Pinout of Connector Block on Host Board
II. Absolute Maximum Ratings
Parameter Symbol Min Typ Max Unit Ref.
Maximum Supply Voltage Vcc -0.5 +4.0 V
Storage Temperature TS -40 +100 °C
Case Operating Temperature TOP 0 +70 °C
Relative Humidity RH 0 85 % 1
III. Electrical Characteristics (TOP=25°C, Vcc=3.3Volts)
Parameter Symbol Min Typ Max Unit Ref.
Supply Voltage Vcc 3.00 3.60 V
Supply Current Icc 180 300 mA
Transmitter
Input differential impedance Rin 100 Ω 2
Single ended data input swing Vin, pp 250 1200 mV
Transmit Disable Voltage VD Vcc - 1.3 Vcc V
Transmit Enable Voltage VEN Vee Vee+ 0.8 V
Transmit Disable Assert Time 10 us
Receiver
Single ended data output swing Vout, pp 300 400 800 mV 3
Data output rise time tr 300 ps 4
Data output fall time tf 300 ps 4
LOS Fault VLOS fault Vcc - 0.5 VccHOST V 5
LOS Normal VLOS norm Vee Vee+0.5 V 5
Deterministic Jitter Contribution RXΔDJ 80 ps 6
Total Jitter Contribution RXΔTJ 122.4 ps
Notes:
1. Non condensing.
2. AC coupled.
3. Into 100 ohm differential termination.
4. 20 - 80 %
5. LOS is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
6. Measured with DJ-free data input signal. In actual application, output DJ will be the sum of input DJ and ΔDJ.
IV. Optical Characteristics (TOP=25°C, Vcc=3.3 Volts)
Parameter Symbol Min Typ Max Unit Ref.
Transmitter
Output Opt. Power PO -9 - -3 dBm 1
Optical Wavelength λ 1275 1310 1350 nm
Spectral Width σ - - 3 nm
Optical Rise/Fall Time tr/tf - 170 260 ps 2
Deterministic Jitter Contribution TXΔDJ - - 0.07 UI 3
Total Jitter Contribution TXΔTJ - - 0.007 UI
Optical Extinction Ratio ER 9 - - dB
Receiver
Average Rx Sensitivity RSENS - - -24 dBm 4
Maximum Received Power RXMAX 0 - - dBm
Optical Center Wavelength λC 1270 - 1600 nm
LOS De-Assert LOSD - - -25 dBm
LOS Assert LOSA -36 - - dBm
LOS Hysteresis 0.5 - - dB
Notes:
1. Class 1 Laser Safety.
2. Unfiltered, 20-80%.
3. Measured with DJ-free data input signal .In actual application, output DJ will be the sum of input DJ and ΔDJ.
4. Measured with PRBS 27-1 at 10-12 BER .
V. General Specifications
Parameter Symbol Min Typ Max Units Ref.
Data Rate BR - - 1250 Mb/sec 1
Bit Error Rate BER - - 10-12 2
Max. Supported Link Length on
9/125μm SMF @ Gigabit Ethernet LMAX - - 20 km 3,4
Notes:
1. Gigabit Ethernet and 1x Fibre Channel compliant.
2. Tested with a PRBS 27-1 data pattern.
3. Dispersion limited per FC-PI-2 Rev. 10.
4. Attenuation of 0.55 dB/km is used for the link length calculations. Please refer to the Optical Specifications in
Table IV to calculate a more accurate link budget based on specific conditions in your application.
VI. Environmental Specifications
1310nm Commercial Temperature SFP transceivers have an operating temperature range from 0°C to +70°C case temperature.
Parameter Symbol Min Typ Max Units Ref.
Case Operating Temperature Top -40 +85 °C
Storage Temperature Tsto -40 +100 °C
VII. Mechanical Specifications
Small Form Factor Pluggable (SFP) transceivers are compatible with the dimensions defined by the SFP Multi-Sourcing Agreement (MSA).
1.25G 1310 20KM
IX. PCB Layout and Bezel Recommendations
X. For More Information
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