Optic fiber Attenuator, Optic fiber adapter-Ocean International Holding
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1310nm SFP transceiver 1.25G SM
Item: 1310nm SFP transceiver 1.25G SM
Description:

Feature
Data rate up to 1.25Gbps
1310 nm FP LD Transmitter
Transmitting distance from 10 km up to 30km
(Up to 40km if use DFB laser)
3.3V DC power supply
Duplex LC Connector Interface
Hot pluggable
Compliant with IEEE 802.3z
Compliant with SFP MSA
ROHS Compliant is available
Digital Diagnostic monitor interface compatible with SFF-8472 is available
Application
Gigabit Ethernet data link
Data storage networks
Optical access network
Other optical links
XDSL Application
Transmitter Section
The transmitter section consists of a high reliability 1310nm laser diode (FP) with back facet monitor photo detector (PD) in eye safety, which is mated to the Tx port of the fiber optic LC duplex receptacle. A driver IC converts differential input data signals into an analog current source that drives the LD, and the input data are ac coupled to the driver.
Receiver Section
The receiver section consists of a high-speed GaAs PIN photodiode (PD) and trans-impedance preamplifier, which is mated to the Rx port of the fiber optic LC duplex receptacle. The output of the PD drives the post-amplification, quantizing, and optical signal detection circuits. The receiver is equipped with the LOS monitoring function. The post-amplifier is AC coupled to the preamplifier and outsider. If a very low signal rate or a code which has significantly more low frequency content is used, sensitivity, jitter and pulse distortion could be degraded.
PECL Logic Level
Logic State Unit Min Typ Max
Low V VCC-1.84 - VCC-1.60
High V VCC-1.10 - VCC-0.90


TTL Logic Level
Logic State Unit Min Typ Max
Low V 0 - 0.8
High V 2.4 - VCC


Pin Descriptions
Pin Name Description Plug Sequence Note
1 VEET Transmitter Ground 1
2 TX Fault Transmitter Fault Indication 3 1
3 TX Disable Transmitter Disable 3 2
4 MOD-DEF2 Module Definition 2 3 3
5 MOD-DEF1 Module Definition 1 3 3
6 MOD-DEF0 Module Definition 0 3 3
7 Rate Select Not Connected 3
8 LOS Loss of Signal 3 4
9 VeeR Receiver Ground 1 5
10 VeeR Receiver Ground 1 5
11 VeeR Receiver Ground 1 5
12 RD- Inverse Received Data Out 3 6
13 RD+ Received Data Out 3 7
14 VeeR Receiver Ground 1 5
15 VccR Receiver Power 2 7
16 VccT Transmitter Power 2 7
17 VeeT Transmitter Ground 1 5
18 TD+ Transmit Data In 3 8
19 TD- Inverse Transmit Data In 3 8
20 VeeT Transmitter Ground 1 5
Note:
1.TX Fault is an open collector output, which should be pulled up with a 4.7k~10kilo-ohm resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; logic 1 indicates a laser fault of some kind. In the low state, the output will be pulled to less than 0.8V.
2. TX Disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7k~10kilo-ohm resistor. Its states are:
Low (0~0.8V): Transmitter on (>0.8V, <2.0V): Undefined
High (2.0~3.465V): Transmitter Disabled
Open: Transmitter Disable
3. MOD-DEF 0,1,2 are the module definition pins. They should be pulled up with a 4.7k~10kilo-ohm resistor on the host board. The pull-up voltage shall be VccT or VccR.
MOD-DEF 0 is grounded by the module to indicate that the module is present
MOD-DEF 1 is the clock line of two wire serial interface for serial ID
MOD-DEF 2 is the data line of two wire serial interface for serial ID
4. LOS is an open collector output, which should be pulled up with a4.7k~10kilo-ohm resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; logic 1 indicates loss of signal. In the low state, the output will be pulled to less than 0.8V.
5.VeeR and VeeT may be internally connected within the SFP module.
6.RD-/+: These are the differential receiver outputs. They are AC coupled 100_ differential lines which should be terminated with 100_ (differential) at the user SERDES. The AC coupling is done inside the module and is thus not required on the host board. The voltage swing on these lines will be between 370 and 2000 mV differential (185 - 1000 mV single ended) when properly terminated.
7.VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V +- 5% at the SFP connector pin. Maximum supply current is 300mA.Recommended host board power supply filtering is shown below. Inductors with DC resistance of less than 1 ohm should be used in order to maintain the required voltage at the SFP input pin with 3.3V supply voltage. When the recommended supply-filtering network is used, hot plugging of the SFP transceiver module will result in an inrush current of no more than 30mA greater than the steady state value. VccR and VccT may be internally connected within the SFP transceiver module.
8. TD-/+: These are the differential transmitter inputs. They are AC-coupled,differential lines with 100_ differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board. The inputs will accept differential swings of 500 - 2400 mV (250 - 1200mV single-ended), though it is recommended that values between 500 and 1200 mV differential (250 - 600mVsingle-ended) be used for best EMI performance.
Absolute Maximum Ratings
Parameter Symbol Min Max Unit Note
Storage Temperature TS -40 85 ºC -
Operating Temperature To -40 85 ºC -
Storage Relative Humidity RHS - 95 % -
Power Supply VCC - 5.5 V -
Lead Solder Temperature TSLD - 260 ºC -
Lead Solder Duration tSLD - 10 s -
Voltage on any input/output pin VIO 0 VCC V -
Performance Specification
Transmitter Characteristics
Parameter Symbol min Typical Max Unit Note
Supply Voltage VCC 3.15 3.3 3.45 V -
Operation Current ICC - - 130 mA -
Differential Input Voltage VIN 400 - 1600 mV -
Data Rate Rate - 1250 - Mbps -
Optical Output Power Po -8 - -2 dBm -
Extinction Ratio ER 8.2 - - dB -
Central Wavelength  1260 1310 1360 nm -
Output Spectrum Width - - 4 nm RMS

Optical Rise Time Tr - - 0.26 ns 20%~80%
Optical Fall Time Tf - - 0.26 ns 20%~80%
Eye Diagram Compliant IEEE802.3z

Receiver Characteristics
Parameter Symbol min Typical Max Unit Note
Supply Voltage VCC 3.14 3.3 3.47 V -
Operation Current IOC - - 120 mA -
Differential Output Voltage VOUT 400 - 2000 mV 1
Data Rate Rate - 1250 - Mbps -
Sensitivity S - - -23 dBm 2
Optical Input Overload POL -3 - - dBm -
Central Wavelength  1100 - 1600 nm -

SD (Signal Detected) Optical Decreased -35 - - dBm -
Optical Increased - -23 dBm -
SD Hysterics PH 0.5 - 5 dB -
Note1: Internally AC coupled.
Note2: Average received power where the BER = 10 -12, measured with a 27-1 NRZ test pattern.
Power Supply
The Transceiver includes internal circuit components to filter power supply noise. Under some conditions of EMI and power supply noise, external power supply filtering may be necessary. If receiver sensitivity is found to be degraded by power supply noise, the filter network illustrated in the following figure may be used to improve performance. The values of the filter components are general recommendations and may be changed to suit a particular system environment. Shielded inductors are recommended.

Recommended Application Circuits

Note1: Internally AC coupled.
Note2: Average received power where the BER = 10 -12, measured with a 27-1 NRZ test pattern.

Ordering Information

Model No. Data Rate Wavelength Laser Type MediaType Reach Temp.(ºC)
JFSFP-LX-SM-10 1.25Gb/s 1310nm FP SMF 10 km -40~85
JFSFP-LX-SM-20 1.25Gb/s 1310nm FP SMF 20 km -40~85
JFSFP-LX-SM-30 1.25Gb/s 1310nm FP SMF 30 km -40~85
JFSFP-LX-SM-40 1.25Gb/s 1310nm DFB SMF 40 km -40~85