1.25Gbps CWDM SFP Optical Transceiver, 20KM Reach
  
Features:

1.Data-rate of 1.25Gbps operation
2.18 CWDM DFB wavelengths laser and PIN photodetector for 20km transmission
3.Compliant with SFP MSA and SFF-8472 with duplex LC receptacle
4.Digital Diagnostic Monitoring:
  Internal Calibration or External Calibration
5.Compatible with SONET OC-24-LR-1
6.Compatible with RoHS
7.+3.3V single power supply
8.Operating case temperature:
  Commercial Temperature: 0 to +70°C
  Industrial Temperature: -40 to +85°C

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

Description:

The SFP transceivers are high performance, cost effective modules supporting data-rate of 1.25Gbps and 20KM transmission distance with SMF.
 
The transceiver consists of three sections: an uncooled CWDM DFB 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.

Product Selection:

TKSX12-3LCD20
Recommended Operating Conditions
 
Specification of Transmitter
 Note:
Measure at 2^23-1 NRZ PRBS pattern
"XX" is: 27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59 and 61; "λ" is 7.5

Transmitter eye mask definition
 
Specification of Receiver
 Notes:
Measured with Light source 1XX0 nm, ER=8.2dB; BER =<10^-12 @PRBS=2^23-1 NRZ ,
"XX" is: 27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59 and 61\
When LOS de-asserted, the RX data+/- output is High-level (fixed)

Electrical Interface CharacteristicsNote: 
A (TX) + B (RX) = 300mA    (Not include termination circuit)

Pin DescriptionsNotes:
Circuit ground is internally isolated from chassis ground.
Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.
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.
This is an optional input used to control the receiver bandwidth for compatibility with multiple data rates (most likely Fiber Channel 1x and 2x Rates).If implemented, the input will be internally pulled down with > 30kΩ resistor.
The input states are:
Low (0 - 0.8V):       Reduced Bandwidth
(>0.8, < 2.0V):       Undefined
High (2.0 - 3.465V):   Full Bandwidth
Open:               Reduced Bandwidth

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
Digital Diagnostic Functions

TKSX12-3LCD20 transceivers support the 2-wire serial communication protocol as defined in the SFP MSA. It is very closely related to the E2PROM defined in the GBIC standard, with the same electrical specifications.
The standard SFP serial ID provides access to identification information that describes the transceiver's capabilities, standard interfaces, manufacturer, and other information.
 
Additionally, TAKFLY SFP transceivers provide a unique enhanced digital diagnostic monitoring interface, which allows real-time access to device operating parameters such as transceiver temperature, laser bias current, transmitted optical power, received optical power and transceiver supply voltage. It also defines a sophisticated system of alarm and warning flags, which alerts end-users when particular operating parameters are outside of a factory set normal range.
 
The SFP MSA defines a 256-byte memory map in E2PROM that is accessible over a 2-wire serial interface at the 8 bit address 1010000X (A0h). The digital diagnostic monitoring interface makes use of the 8 bit address 1010001X (A2h), so the originally defined serial ID memory map remains unchanged. The interface is identical to, and is thus fully backward compatible with both the GBIC Specification and the SFP Multi Source Agreement.
 
The operating and diagnostics information is monitored and reported by a Digital Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed through a 2-wire serial interface. When the serial protocol is activated, the serial clock signal (SCL, Mod Def 1) is generated by the host. The positive edge clocks data into the SFP transceiver into those segments of the E2PROM that are not write-protected. The negative edge clocks data from the SFP transceiver.  The serial data signal (SDA, Mod Def 2) is bi-directional for serial data transfer. The host uses SDA in conjunction with SCL to mark the start and end of serial protocol activation. The memories are organized as a series of 8-bit data words that can be addressed individually or sequentially.
 
Digital diagnostics for the TKSX12-3LCD20 are internally calibrated by default

Regulatory Compliance 
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!
 
Item and company images:










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.
 
Having a nice shopping time!