1.25G single mode dual fibers SFP Optical Module LC20KM
1.Feature:
1.Dual data-rate of 1.25Gbps/1.063Gbps operation;
2.1310nm FP laser and PIN photodetector for 20km transmission;
3.Compliant with SFP MSA and SFF-8472 with duplex LC receptacle;
4.Digital Diagnostic Monitoring;
5.Internal Calibration or External Calibration;
6.Compatible with SONET OC-24-LR-1;
7.Compatible with RoHS;
8.+3.3V single power supply;
9.Operating case temperature:
10.Standard: 0 to +70°C
11.Extended: -20 to +85°C
12.Industrial: -40 to +85°C
2.Applications:
1.Gigabit Ethernet;
2.Fiber Channel;
3.Switch to Switch interface;
4.Switched backplane applications;
5.Router/Server interface;
6.Other optical transmission systems;
3.Description:
The SFP transceivers are high performance, cost effective modules supporting dual data-rate of 1.25Gbps/1.0625Gbps and 20km transmission distance with SMF.
The transceiver consists of three sections: a FP laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.
The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472.
4.Absolute Maximum Ratings:
Table 1 - Absolute Maximum Ratings:
| Parameter |
Symbol |
Min |
Max |
Unit |
| Supply Voltage |
Vcc |
-0.5 |
4.5 |
V |
| Storage Temperature |
Ts |
-40 |
+85 |
°C |
| Operating Humidity |
- |
5 |
85 |
% |
5.Recommended Operating Conditions:
Table 2 - Recommended Operating Conditions:
| Parameter |
Symbol |
Min |
Typical |
Max |
Unit |
| Operating Case Temperature |
Standard |
Tc |
0 |
|
+70 |
°C |
| -20 |
+85 |
| Industrial |
-40 |
|
+85 |
°C |
| Power Supply Voltage |
Vcc |
3.13 |
3.3 |
3.47 |
V |
| Power Supply Current |
Icc |
|
|
300 |
mA |
| Data Rate |
Gigabit Ethernet |
|
|
1.25 |
|
Gbps |
| Fiber Channel |
|
|
1.063 |
|
6.Optical and Electrical Characteristics:
DF -3124-L2x(D): (FP and PIN, 1310nm, 20km Reach)
Table 3 - Optical and Electrical Characteristics
| Parameter |
Symbol |
Min |
Typical |
Max |
Unit |
Notes |
| Transmitter |
| Centre Wavelength |
λc |
1260 |
1310 |
1360 |
nm |
|
| Spectral Width (RMS) |
λ |
|
|
4 |
nm |
|
| Average Output Power |
Pout |
-9 |
|
-3 |
dBm |
1 |
| Extinction Ratio |
ER |
9 |
|
|
dB |
|
| Optical Rise/Fall Time (20%~80%) |
tr/tf |
|
|
0.26 |
ns |
|
| Data Input Swing Differential |
VIN |
400 |
|
1800 |
mV |
2 |
| Input Differential Impedance |
ZIN |
90 |
100 |
110 |
Ω |
|
| TX Disable |
Disable |
|
2.0 |
|
Vcc |
V |
|
| Enable |
|
0 |
|
0.8 |
V |
|
| TX Fault |
Fault |
|
2.0 |
|
Vcc |
V |
|
| Normal |
|
0 |
|
0.8 |
V |
|
| Receiver |
| Centre Wavelength |
λc |
1260 |
|
1580 |
nm |
|
| Receiver Sensitivity |
|
|
|
-23 |
dBm |
3 |
| Receiver Overload |
|
0 |
|
|
dBm |
3 |
| LOS De-Assert |
LOSD |
|
|
-24 |
dBm |
|
| LOS Assert |
LOSA |
-35 |
|
|
dBm |
|
| LOS Hysteresis |
|
1 |
|
4 |
dB |
|
| Data Output Swing Differential |
Vout |
400 |
|
1800 |
mV |
4 |
| LOS |
High |
2.0 |
|
Vcc |
V |
|
| Low |
|
|
0.8 |
V |
|
Notes:
1. The optical power is launched into SMF.
2. PECL input, internally AC-coupled and terminated.
3. Measured with a PRBS 27-1 test pattern @1250Mbps, BER ≤1×10-12.
4. Internally AC-coupled.
7.Timing and Electrical:
Table 4 - Timing and Electrical:
| Parameter |
Symbol |
Min |
Typical |
Max |
Unit |
| Tx Disable Negate Time |
t_on |
|
|
1 |
ms |
| Tx Disable Assert Time |
t_off |
|
|
10 |
µs |
| Time To Initialize, including Reset of Tx Fault |
t_init |
|
|
300 |
ms |
| Tx Fault Assert Time |
t_fault |
|
|
100 |
µs |
| Tx Disable To Reset |
t_reset |
10 |
|
|
µs |
| LOS Assert Time |
t_loss_on |
|
|
100 |
µs |
| LOS De-assert Time |
t_loss_off |
|
|
100 |
µs |
| Serial ID Clock Rate |
f_serial_clock |
|
|
400 |
KHz |
| MOD_DEF (0:2)-High |
VH |
2 |
|
Vcc |
V |
| MOD_DEF (0:2)-Low |
VL |
|
|
0.8 |
V |
8.Diagnostics:
Table 5 - Diagnostics Specification:
| Parameter |
Range |
Unit |
Accuracy |
Calibration |
| Temperature |
0 to +70 |
°C |
±3°C |
Internal / External |
| -40 to +85 |
| Voltage |
3.0 to 3.6 |
V |
±3% |
Internal / External |
| Bias Current |
0 to 100 |
mA |
±10% |
Internal / External |
| TX Power |
-9 to -3 |
dBm |
±3dB |
Internal / External |
| RX Power |
-23 to 0 |
dBm |
±3dB |
Internal / External |
9.Digital Diagnostic Memory Map:
The transceivers provide serial ID memory contents and diagnostic information about the present operating conditions by the 2-wire serial interface (SCL, SDA).
The diagnostic information with internal calibration or external calibration all are implemented, including received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring.
10.Pin Descriptions:
| Pin |
Signal Name |
Description |
Plug Seq. |
Notes |
| 1 |
VEET |
Transmitter Ground |
1 |
|
| 2 |
TX FAULT |
Transmitter Fault Indication |
3 |
Note 1 |
| 3 |
TX DISABLE |
Transmitter Disable |
3 |
Note 2 |
| 4 |
MOD_DEF(2) |
SDA Serial Data Signal |
3 |
Note 3 |
| 5 |
MOD_DEF(1) |
SCL Serial Clock Signal |
3 |
Note 3 |
| 6 |
MOD_DEF(0) |
TTL Low |
3 |
Note 3 |
| 7 |
Rate Select |
Not Connected |
3 |
|
| 8 |
LOS |
Loss of Signal |
3 |
Note 4 |
| 9 |
VEER |
Receiver ground |
1 |
|
| 10 |
VEER |
Receiver ground |
1 |
|
| 11 |
VEER |
Receiver ground |
1 |
|
| 12 |
RD- |
Inv. Received Data Out |
3 |
Note 5 |
| 13 |
RD+ |
Received Data Out |
3 |
Note 5 |
| 14 |
VEER |
Receiver ground |
1 |
|
| 15 |
VCCR |
Receiver Power Supply |
2 |
|
| 16 |
VCCT |
Transmitter Power Supply |
2 |
|
| 17 |
VEET |
Transmitter Ground |
1 |
|
| 18 |
TD+ |
Transmit Data In |
3 |
Note 6 |
| 19 |
TD- |
Inv. Transmit Data In |
3 |
Note 6 |
| 20 |
VEET |
Transmitter Ground |
1 |
|
11.Mechanical Dimensions:
12.Ordering information:
| Part Number |
Product Description |
| DF-3124-L2C |
1310nm, 1.25Gbps, 20km, 0ºC ~ +70ºC |
| DF-3124-L2CD |
1310nm, 1.25Gbps, 20km, 0ºC ~ +70ºC, With Digital Diagnostic Monitoring |
| DF-3124-L2N |
1310nm, 1.25Gbps, 20km, -20ºC ~ +85ºC |
| DF-3124-L2ND |
1310nm, 1.25Gbps, 20km, -20ºC ~ +85ºC, With Digital Diagnostic Monitoring |
| DF-3124-L2T |
1310nm, 1.25Gbps, 20km, -40ºC ~ +85ºC |
| DF-3124-L2TD |
1310nm, 1.25Gbps, 20km, -40ºC ~ +85ºC, With Digital Diagnostic Monitoring |
13.Our item images:
14.Company Information:
Takfly, established in 2000, has been manufacturing and exporting fiber cable, adapter, attenuator, connector, coupler, splitter, termination box, ODF, fiber instruments, media conceiver, switch, optical module, CWDM/DWDM, etc. Takfly's products have passed the management verification: ISO14001: 2004. and goods have passed RoHS, CE, FCC, REACH, EN50575, ISO9001, etc.
So far, Our products have been widely installed in many big worldwide project and work perfectly. Many project contactors ask the first and second operators to purchase fiber items from Takfly for their new project. In addition, we also have builted long term cooperation with Lapp, Amper, Telefonica, orange and Ericsson. All enquiry are warmly welcomed here no matter it's small or big, we promise to provide all customers high quality and good price item.
15.Why choose Takfly?
Service
1.Customer's logo: Acceptable;
2.General inspection on fixing before packing;
3.Third party inspection: Acceptable;
Quality Control
All products must go through five checks before manufacturing process;
1.Material incoming inspection before production;
2.Full check after every individual process finished;
3.Full check after production half-done;
4.Full check before packing;
5.Spots check after production packed before shipping;
Advantage
1.15 years experience in manufacturing fiber optic products;
2.Availability of R & D with more than 10 engineers;
3.Available of design and making mold with special molding house;
4.High quality, attractive price and fast delivery(2-7days);
5.OEM, ODM customer designs are also welcomed;
6.More than 200 workers;
7.Excellent service;
Delivery
1.Packing: Plastic bag& carton, Neutral packing or as your required;
2.Sample time: 1-3 days after confirm;
3.Order lead time: 2-7working days depend on quantity and products;
4.Shipping port: Shenzhen China or HK;
5.Shipping term: EXW or FOB;
Shipping
1.Once confirmed the order, and payment sent after finishing goods;
2.Goods will be sent within 7 days with the fast, reasonable and efficient shipping mode such as DHL, EMS, UPS,FEDEX, TNT, etc;
3.Please make sure your postal address is correct. Any lost and mistakes because of wrong address are not supplier's responsibility;
4.Please do not bid if you disagree with the shipping and
handling charge;
Welcome to your trial order. If i'm of further help to you, pls do not heistate to contact me.
Audited Supplier 
){kind=link}