155m / 1.25gbps Bidi SFP Module GBIC Optical Transceiver

Industrial Grade 1.25Gbps Bi-directional SFP TransceiverFeatureCompliant with IEEE802.3z Gigabit Ethernet StandardCompliant with Fiber Channel 100-SM-LC-L standardIndustry standard small form pluggable (SFP) packageSimplex SC connectorDifferential LVPECL inputs and outputsSingle power supply 3.3VTTL signal detect indicatorHot Pl

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Industrial Grade 1.25Gbps Bi-directional SFP Transceiver

Compliant with IEEE802.3z Gigabit Ethernet Standard
Compliant with Fiber Channel 100-SM-LC-L standard
Industry standard small form pluggable (SFP) package
Simplex SC connector
Differential LVPECL inputs and outputs
Single power supply 3.3V
TTL signal detect indicator
Hot Pluggable
Class 1 laser product complies with EN 60825-1
RoHS Compliant
CPRI ready
Transmission distance up to 20km by single fiber
Compliant with cisco/HP/Huawei etc brand switch or router
Work temperature -40-+85ºC
Gigabit Ethernet Application
Point-to-Point FTTX Application
 155m/1.25gbps Bidi SFP Module GBIC Optical Transceiver
155m/1.25gbps Bidi SFP Module GBIC Optical Transceiver

The PHY-3524-1LX Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA)1. They are simultaneously compatible with Gigabit Ethernet as specified in IEEE Std 802.32 and
Fibre Channel FC- PI-2 Rev. 7.03. They are RoHS compliant and lead-free per Directive
. Pin Descriptions
1VEETTransmitter Ground (Common with Receiver Ground)1
2TFAULTTransmitter Fault. Not supported. 
3TDISTransmitter Disable. Laser output disabled on high or open.2
4MOD_DEF(2)Module Definition 2. Data line for Serial ID.3
5MOD_DEF(1)Module Definition 1. Clock line for Serial ID.3
6MOD_DEF(0)Module Definition 0. Grounded within the module.3
7Rate SelectNo connection required 
8LOSLoss of Signal indication. Logic 0 indicates normal operation.4
9VEERReceiver Ground (Common with Transmitter Ground)1
10VEERReceiver Ground (Common with Transmitter Ground)1
11VEERReceiver Ground (Common with Transmitter Ground)1
12RD-Receiver Inverted DATA out. AC Coupled 
13RD+Receiver Non-inverted DATA out. AC Coupled 
14VEERReceiver Ground (Common with Transmitter Ground)1
15VCCRReceiver Power Supply 
16VCCTTransmitter Power Supply 
17VEETTransmitter Ground (Common with Receiver Ground)1
18TD+Transmitter Non-Inverted DATA in. AC Coupled. 
19TD-Transmitter Inverted DATA in. AC Coupled. 
20VEETTransmitter Ground (Common with Receiver Ground)1
1. Circuit ground is internally isolated from chassis ground.
2. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <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 open collector 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.
.Absolute Maximum Ratings
Storage TemperatureTS-45+100ºC
Supply VoltageVcc-0.56.0V
Input VoltageVIN-0.5VccV
Output CurrentIo 50mA
Operating CurrentIOP 400mA
Case Operating TemperatureTC-40+85ºC
Supply CurrentITX + IRX 250mA
.Transmitter Electro-optical Characteristics
Vcc = 3.1 V to 3.5 V, TC =-40ºC to +85 ºC
Output Optical Power
9/125 μm fiber
Extinction RatioER9------dB 
Center WavelengthλC126013101360nm 
Spectral Width (RMS)
Rise/Fall Time, (2080%)Tr/f------260ps 
Relative Intensity NoiseRIN-------120dB/Hz 
Total JitterTJ------227ps 
Output EyeCompliant with IEEE802.3z
Max. Pout TX-DISABLE AssertedPOFF-------45dBm 
Differential Input VoltageVDIFF0.4---2.0V 
1.PHY-3524-1L2     2.PHY-3524-1L4       3.PHY-3524-1L6
.Receiver Electro-optical Characteristics
Vcc = 3.1 V to 3.5 V, TC =-40ºC to +85 ºC
Optical Input Power-maximumPIN0------dBmBER < 10-12
Optical Input Power-minimum
BER < 10-12
Operating Center WavelengthλC148015501580nm 
Optical Return LossORL14------dB1480~1580nm
Optical isolationISO-------40dB1480~1580nm
Signal Detect-AssertedPA-------24dBm 
Signal Detect-DeassertedPD-35--- dBm 
Differential Output VoltageVDIFF0.5---1.2V 
Data Output Rise, Fall Time
T r/f
Receiver Loss of Signal Output
Receiver Loss of Signal Output
.Block Diagram of Transceiver

Transmitter and Receiver Optical Sub-assembly Section
A 1310 nm InGaAsP laser and an InGaAs PIN photodiode integrate with an WDM filter to form a bi-directional single fiber optical subassembly (OSA). The laser of OSA is driven by a LD driver IC which converts differential input LVPECL logic signals into an analog laser driving current. And, The photodiode of OSA is connected to a circuit providing post-amplification quantization, and optical signal detection.
The TX_DISABLE signal is high (TTL logic "1") to turn off the laser output.
Receive Loss (RX_LOS)
The RX_LOS is high (logic "1") when there is no incoming light from the companion transceiver. This signal is normally used by the system for the diagnostic purpose. The signal is operated in TTL level.
. PCB Layout and Bezel Recommendations

.Recommended Interface Circuit

.Ordering Information
Part NumberTx/RxInput/OutputSignal DetectTemperatureLD TypeDistance
. References
1. Small Form Factor Pluggable (SFP) Transceiver Multi-source Agreement (MSA).
September 14, 2000.
2. IEEE Std 802.3, 2002 Edition, Clause 38, PMD Type 1000BASE-SX. IEEE Standards
Department 2002.
3. "Fibre Channel Draft Physical Interface Specification (FC-PI-2 Rev. 7.0)". American
National Standard For Information Systems.
4. Directive 2002/95/EC of the European Council Parliament and of the Council, "on the restriction of the use of certain hazardous substances in electrical and electronic equipment." January 27, 2003.
Handling Precautions: This device is susceptible to damage as a result of electrostatic discharge (ESD).  A  static  free  environment  is  highly  recommended.  Follow  guidelines according  to proper  ESD  procedures.
Laser Safety:  Radiation emitted by laser devices can be dangerous to human eyes. Avoid eye exposure to  direct  or indirect  radiation.


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