CWDM uses 1.25gbps 80km module GBIC SFP optical transceiver

CWDM Used 1.25gbps 80km Module GBIC SFP Optical Transceiver1.Features1.Dual data-rate of 1.25Gbps/1.0625Gbps operation;2.18 CWDM DFB wavelengths laser and PIN photodetector for 80km transmission;3.Duplex SC optical interface;4.Standard serial ID information compatible with SFF-8053+3.3V/5Vsingle power supplyRoHS Compliant;5

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CWDM Used 1.25gbps 80km Module GBIC SFP Optical Transceiver


1.Dual data-rate of 1.25Gbps/1.0625Gbps operation;
2.18 CWDM DFB wavelengths laser and PIN photodetector for 80km transmission;
3.Duplex SC optical interface;
4.Standard serial ID information compatible with SFF-8053+3.3V/5Vsingle power supplyRoHS Compliant;
5.Operating case temperature: 0 to +70ºC;


1.Switch to Switch interface;
2.Switched backplane applications;
3.Router/Server interface;
4.Other optical transmission systems;


The GBIC transceiver is high performance, cost effective module supporting dual data-rate of 1.25Gbps/1.0625Gbps and from 80km transmission distance with SMF.
The transceiver consists of two sections: The transmitter section incorporates a DFB laser. And the receiver section consists of a PIN photodiode integrated with a trans-impedance preamplifier (TIA). All odules 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.
Absolute Maximum Ratings
Stress in excess of the maximum absolute ratings can cause permanent damage to the module.
Table 1 - Absolute Maximum Ratings

Maximum Supply VoltageVcc0.5-4.5V
Storage TemperatureTS-40-+85ºC
Relative HumidityRH0-+85%
Table2 - Recommended Operating Conditions

Operating Case TemperatureStandard0-+70ºC
Power Supply Voltage3.1 5.5v
Power Supply Current  300mA
Data RateGigabit Ethernet 1.25 Gbps
Fibre Channel 1.0625 
See table3 below for "xx" values
Table3 -λC Wavelength Guide

λC Wavelength Guide
Optical and Electrical Characteristics:
DF-xx24-08C: (CWDM and PIN, 80km)

Table3 - Optical and Electrical Characteristics  (Operating case temperature TC=25ºC, VCC=3.3V)

Spectral Width (-20dB)σ  1nm 
Side Mode Suppression RatioSMSR30  dB 
Average Output PowerP0ut0 +5dBm1
Extinction RatioER9  dB 
Output Optical EyeIEEE 802.3z and ANSI Fiber Channel compatible2
Data Input Swing DifferentialVIN200 2400mV3
Input Differential ImpedanceZIN90100110Ω 
TX DisableDisable 2.0 VccV 
Enable 0 0.8V 
TX FaultFault 2.0 Vcc+0.3V 
Normal 0 0.8V 
Receiver Sensitivity   -23dBm4
Receiver Overload -3  dBm4
Optical Path Penalty   1dB5
LOS De-AssertLOSD  -24dBm 
LOS AssertLOSA-30  dBm 
LOS Hysteresis 1 4dB 
Data Output Swing DifferentialVOUT600 1000mV6

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.
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).
Pin Descriptions
Pin NamePin#Name/FunctionSignal Specification
Receiver signals
RGND2,3,11,14Receiver Ground
(may be connected sith TGND in GBIC)
Groud,to GBIC
VDDR15Receiver+3.3/5 volt
(may be connected with VDDT in GBIC)
Power,to GBIC
-RX_DAT12Receive Data,Differential PECLHigh speed serial.from GBIC
+RX_DAT13Receive Data,Differential PECLHigh speed serial.from GBIC
RX_LOS1Receiver Loss of Signal,logic high,open collector compatible,4.7k to 10kΩpull up to VDDT on hostLow speed,from GBIC
Transmitter signals
TGND8,9,17,20Transmitter Groud
(may be connected with RGND internally)
Ground,to GBIC
VDDT16Transmitter +3.3/5 volt
(may be connected with VDDR in GBIC)
Power,to GBIC
-TX_DAT18Transmit Data, Differential PECLHigh speed serial,to GBIC
+TX_DAT19Transmit Data, Differential PECLHigh speed serial,to GBIC
TX_DISABLE7Transmitter Disable, logic high, open collector
Compatible,4.7k to 10kΩ pull up to VDDT on GBIC
Low speed,to GBIC
TX_FAULT10Transmitter,Fault,logic high, open collector compatible,4.7k to 10kΩ pull up to VDDT on hostLow speed,from GBIC
Control signals
MOD_DEF(0)4TTL low, outputPlease reference
SFF-8053,Annex D;
Module definition"4"
MOD_DEF(1)5SCL serial clock signal, input
MOD_DEF(2)6SDA serial data signal, input/output
4.Ordering information
Part  numberProduct Description
DF-2724-08C1270nm, 1.25Gbps, 80km,  0°C~+70°C
DF-2924-08C1290nm, 1.25Gbps, 80km,  0°C~+70°C
DF-3124-08C1310nm, 1.25Gbps, 80km,  0°C~+70°C
DF-3324-08C1330nm, 1.25Gbps, 80km,  0°C~+70°C
DF-3524-08C1350nm, 1.25Gbps, 80km,  0°C~+70°C
DF-3724-08C1370nm, 1.25Gbps, 80km,  0°C~+70°C
DF-3924-08C1390nm, 1.25Gbps, 80km,  0°C~+70°C
DF-4124-08C1410nm, 1.25Gbps, 80km,  0°C~+70°C
DF-4324-08C1430nm, 1.25Gbps, 80km,  0°C~+70°C
DF-4524-08C1450nm, 1.25Gbps, 80km,  0°C~+70°C
DF-4724-08C1470nm, 1.25Gbps, 80km,  0°C~+70°C
DF-4924-08C1490nm, 1.25Gbps, 80km,  0°C~+70°C
DF-5124-08C1510nm, 1.25Gbps, 80km,  0°C~+70°C
DF-5324-08C1530nm, 1.25Gbps, 80km,  0°C~+70°C
DF-5524-08C1550nm, 1.25Gbps, 80km,  0°C~+70°C
DF-5724-08C1570nm, 1.25Gbps, 80km,  0°C~+70°C
DF-5924-08C1590nm, 1.25Gbps, 80km,  0°C~+70°C
DF-6124-08C1610nm, 1.25Gbps, 80km,  0°C~+70°C
5.Company Information

Takfly, established in 2000, has been manufacturing and exporting in fiber optic communications for more than 15 years. Mainly supplying 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. Our goods have passed RoHS, CE, ISO9001, FCC, etc. verifications.

With the development of optical communications, Takfly's turnover has been increasing steadily. To strengthen the brand recognition and communication with more clients, Takfly participates in several industrial exhibitions every year in the whole word.

The products we sell is manufactured by our own factories. Our main aim is to supply high quality goods to our customers. Therefore, Takfly has imported foreign advanced production equipment 5 years ago, mainly made in German, Japan. The skilled technicians and professional sales team are available. Standard production management system has been built. Any requirements and inquiries will be processed with 24 hours. Strict test is a must before delivery. Apart from these, we have steady transport service. So, we can provide you the optimal transportation.

No complaints  is one of our aims. We believe that our products can help you win good reputation and market share.
Hereby, we sincerely hope to establish a long-term business relationship with you in the future.
Welcome to visit Takfly Communications Co., Ltd. We are waiting for your coming!

6.Item and company images

CWDM Used 1.25gbps 80km Module GBIC SFP Optical Transceiver
CWDM Used 1.25gbps 80km Module GBIC SFP Optical Transceiver
CWDM Used 1.25gbps 80km Module GBIC SFP Optical Transceiver

CWDM Used 1.25gbps 80km Module GBIC SFP Optical Transceiver
CWDM Used 1.25gbps 80km Module GBIC SFP Optical Transceiver
CWDM Used 1.25gbps 80km Module GBIC SFP Optical Transceiver

Why choose Takfly ?


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

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

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

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.
Having a nice shopping time!


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