1.25g SFP Bidi Bx 20km Reach

Description

1.25G SFP BiDi BX 20km reach

Features:

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. For further information, please refer to SFP MSA.

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	%

 
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

 
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

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.
 
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

 
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

 
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.
 
The digital diagnostic memory map specific data field defines as following:
 

Pin Definitions:
Pin Diagram

Notes:
Plug Seq.: Pin engagement sequence during hot plugging.
1) TX Fault is an open collector output, which should be pulled up with a 4.7k~10kΩ 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~10kΩ resistor. Its states are:
Low (0 to 0.8V):            Transmitter on
(>0.8V, < 2.0V):            Undefined
High (2.0 to 3.465V):        Transmitter Disabled
Open:                     Transmitter Disabled
3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7k~10kΩ 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 a 4.7k~10kΩ resistor. Pull up voltage between 2.0V and Vcc+0.3V. Logic 1 indicates loss of signal; Logic 0 indicates normal operation. In the low state, the output will be pulled to less than 0.8V.
5) RD-/+: These are the differential receiver outputs. They are internally AC-coupled 100 differential lines which should be terminated with 100Ω (differential) at the user SERDES.
6) TD-/+: These are the differential transmitter inputs. They are internally AC-coupled, differential lines with 100Ω differential termination inside the module.
 
Recommended Interface Circuit:

Mechanical Dimensions:



 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

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 worker
7.Excellent service
 
Delivery:
1.Packing: Plastic bag& carton, Neutral packing or as your required.
2.Sample time: 1-3 days after confirmation.
3.Order lead time: 2-7working days depend on quantity and products.
4.Shipping port: Shenzhen, HK or other ports as you required.
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.