1.25G single mode sfp bidi optical transceiver SC20KM
1.Features
1.Dual data-rate of 1.25Gbps/1.0625Gbps operation;
2.1310nm FP laser and PIN photodetector for 20km transmission;
3.Duplex SC optical interface;
4.Standard serial ID information compatible with SFF-8053;
5.+3.3V/5Vsingle power supply;
6.RoHS Compliant;
7.Operating case temperature: Standard : 0 to +70°C;
2.Applications
1.Switch to Switch interface;
2.Switched backplane applications;
3.Router/Server interface;
4.Other optical transmission systems;
3.Description
The GBIC transceiver is high performance, cost effective module supporting dual data-rate of 1.25Gbps/1.0625Gbps and from 20km transmission distance with SMF.
The transceiver consists of two sections: The transmitter section incorporates a FP laser. And the receiver section consists of a PIN photodiode integrated with a trans-impedance preamplifier (TIA). All modules satisfy class I laser safety requirements.
The optical output can be disabled by a TTL logic high-level input of Tx Disable. Tx Fault is provided to indicate degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver.
The standard serial ID information Compatible with GBIC MSA describes the transceiver's capabilities, standard interfaces, manufacturer and other information. The host equipment can access this information via the two-wire serial CMOS EEPROM protocol. For further information, please refer to SFF-8053
4.Absolute Maximum Rating
Stress in excess of the maximum absolute ratings can cause permanent damage to the module.
| Parameter | Symbol | Min | Typical | Max | Unit |
| Maximum Supply Voltage | Vcc | 0.5 | - | 4.5 | V |
| Storage Temperature | TS | -40 | - | 100 | ºC |
| Relative Humidity | RH | 0 | - | +85 | % |
5.Recommended Operating Conditions
| Parameter | Symbol | Min | Typical | Max | Unit |
| Operating Case Temperature | Standard | TC | 0 | - | +70 | ºC |
| Power Supply Voltage | VCC | 3.1 | | 5.5 | v |
| Power Supply Current | Icc | | | 300 | mA |
| Data Rate | Gigabit Ethernet | | | 1.25 | | Gbps |
| Fibre Channel | | | 1.0625 | |
6.Optical and Electrical Characteristics
DF-3424S-L2C: (1310nm FP and PIN, 10~20km)
(Operating case temperature TC=25ºC, VCC=3.3V)
| Parameter | Symbol | Min. | Typical | Max. | Unit | Notes |
| Transmitter |
| Centre Wavelength | λC | 1260 | 1310 | 1360 | nm | |
| Average Output Power | P0ut | -9 | | 0 | dBm | 1 |
| Spectral Width (RMS) | σ | | | 4 | nm | |
| Extinction Ratio | ER | 9 | | | dB | |
| Output Optical Eye | IEEE 802.3z and ANSI Fibre Channel compatible | 2 |
| Data Input Swing Differential | VIN | 300 | | 1860 | mV | 3 |
| 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+0.3 | V | |
| Normal | | 0 | | 0.8 | V | |
| Receiver |
| Centre Wavelength | λC | 1470 | | 1510 | nm | |
| Receiver Sensitivity | | | | -23 | dBm | 4 |
| Receiver Overload | | -3 | | | dBm | 4 |
| Optical Path Penalty | | | | 1 | dB | 5 |
| LOS De-Assert | LOSD | | | -23 | dBm | |
| LOS Assert | LOSA | -30 | | | dBm | |
| LOS Hysteresis | | 1 | | 4 | dB | |
| Data Output Swing Differential | VOUT | 370 | | 1800 | mV | 6 |
Notes:
1. The optical power is launched into SMF;
2. Measured with a PRBS 27-1 test pattern @1250Mbps;
3. PECL input, internally AC coupled and terminated;
4. Measured with a PRBS 27-1 test pattern @1250Mbps, BER ≤1×10-12
5. Measured with a PRBS 27-1 test pattern @1250Mbps, over 20km G.652 SMF, BER ≤1×10-12
6. Internally AC coupled;
7.EEPROM Section:
The SFF-8053 defines a 256-byte memory map in EEPROM describing the transceiver's capabilities,
standard interfaces, manufacturer, and other information, which is accessible over a 2 wire serial
interface at the 8-bit address 1010000X (A0h).
8.Pin Descriptions
| Pin Name | Pin# | Name/Function | Signal Specification |
| Receiver signals |
| RGND | 2,3,11,14 | Receiver Ground
(may be connected sith TGND in GBIC) | Groud,to GBIC |
| VDDR | 15 | Receiver+3.3/5 volt
(may be connected with VDDT in GBIC) | Power,to GBIC |
| -RX_DAT | 12 | Receive Data,Differential PECL | High speed serial.from GBIC |
| +RX_DAT | 13 | Receive Data,Differential PECL | High speed serial.from GBIC |
| RX_LOS | 1 | Receiver Loss of Signal,logic high,open collector compatible,4.7k to 10kΩpull up to VDDT on host | Low speed,from GBIC |
| Transmitter signals |
| TGND | 8,9,17,20 | Transmitter Groud
(may be connected with RGND internally) | Ground,to GBIC |
| VDDT | 16 | Transmitter +3.3/5 volt
(may be connected with VDDR in GBIC) | Power,to GBIC |
| -TX_DAT | 18 | Transmit Data,Differential PECL | High speed serial,to GBIC |
| +TX_DAT | 19 | Transmit Data,Differential PECL | High speed serial,to GBIC |
| TX_DISABLE | 7 | Transmitter Disable,logic high,open collector
Compatible,4.7k to 10kΩ pull up to VDDT on GBIC | Low speed,to GBIC |
| TX_FAULT | 10 | Transmitter,Fault,logic high,open collector compatible,4.7k to 10kΩ pull up to VDDT on host | Low speed,from GBIC |
| Control signals |
| MOD_DEF(0) | 4 | TTL low,output | Please reference
SFF-8053,Annex D;
Module definition"4" |
| MOD_DEF(1) | 5 | SCL serial clock signal,input |
| MOD_DEF(2) | 6 | SDA serial data signal,input/output |
9.Mechanical Dimensions
10.Ordering information
| Part number | Product Description |
| DF-3424S-L2C | 1310nm, 1.25Gbps, SC, 20km, 0°C~+70°C |
11.Our item images:
12.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.
13.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}