1.25Gbps SM SFP Optical Transceiver

Model NO.: SFP-S1215L-120
Delivery: FOB
Supply Ability: 5000 / Day
Country of Origin: SHENZHEN
Stock Time: 3-5 Days

Quantity:

Product Description

Features

Up to 1.25Gbps data links
1550nm DFB laser and photo TIA+PINdetector for 120km transmission
Compliant with SFP MSA and SFF-8472 with Duplex LC receptacle
Digital Diagnostic Monitoring: Internal Calibration or External Calibration
Compatible with SONET
Compatible with RoHS
+3.3V single power supply
Operating case temperature:Standard :0 to +70°CIndustrial : -40 to +85°C

Applications

SDH and SONET system
Fiber Channel
Switch to Switch interface
Switched backplane applications
Router/Server interface
Other optical transmission systems

Description

The SFP transceiversare high performance, cost effective modulessupporting dual data-rate of 1.25Gbps and 120km transmission distance with SMF.

The transceiver consists of threesections: a DFP laser transmitter,a PIN photodiode integrated with a trans-impedance preamplifier(TIA)and MCU control unit. All modules satisfy class I laser safety requirements.

Thetransceivers are compatible with SFP Multi-Source Agreement (MSA). For further information, please refer to SFP MSA.

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

Parameter		Symbol	Min	Typical	Max	Unit
Operating Case Temperature	Standard	Tc	0		+70	°C
Operating Case Temperature	Industrial	Tc	-40		+85	°C
Power Supply Voltage		Vcc	3.135	3.30	3.465	V
Power Supply Current		Icc			300	mA
Data Rate			0.1	1.25		Gbps

Optical and Electrical Characteristics

Parameter		Symbol		Min	Typical	Max	Unit	Notes
Transmitter
Centre Wavelength			λc	1530	1550	1570	nm
Spectral Width（-20dB）			Δλ			1	nm
Side-Mode Suppression Ratio			SMSR	30	-	-	dB
Average Output Power			P_out	1		+5	dBm	1
Extinction Ratio			ER	9.0			dB
Data Input Swing Differential			V_IN	180		1200	mV	2
Input Differential Impedance			Z_IN	90	100	110	Ω
TX Disable	Disable			2.0		Vcc	V
TX Disable	Enable			0		0.8	V
TX Fault	Fault			2.0		Vcc	V
TX Fault	Normal			0		0.8	V
Receiver
Centre Wavelength			λc	1260		1610	nm
Receiver Sensitivity						-28	dBm	3
Receiver Overload				-1			dBm	3
LOS De-Assert			LOS_D			-29	dBm
LOS Assert			LOS_A	-40			dBm
LOS Hysteresis				0.5		4	dB
Data Output Swing Differential			V_out	600	800	1000	mV	4
LOS			High	2.0		Vcc	V
LOS			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

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 TxFault	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		100	400	KHz
MOD_DEF (0:2)-High	V_H	2		Vcc	V
MOD_DEF (0:2)-Low	V_L			0.8	V

Diagnostics

Parameter	Range	Unit	Accuracy	Calibration
Temperature	0 to +70	°C	±3°C	Internal/External
Temperature	-40 to +85	°C	±3°C	Internal/External
Voltage	3.0 to 3.6	V	±3%	Internal/External
Bias Current	0 to 100	mA	±10%	Internal/External
TX Power	0to5	dBm	±3dB	Internal/External
RX Power	-24 to -3	dBm	±3dB	Internal/External

Digital Diagnostic Memory Map

The transceivers provide serial ID memory contents and diagnostic information about the present operating conditionsby the 2-wireserial interface(SCL, SDA).

The diagnostic information with internal calibrationor external calibration all are implemented,includingreceived 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

Pin Descriptions

Pin	Signal Name	Description	Plug Seq.	Notes
1	V_EET	Transmitter Ground	1
2	TX FAULT	Transmitter Fault Indication	3	Note1
3	TXDISABLE	Transmitter Disable	3	Note2
4	SDA	SDA Serial Data Signal	3
5	SCL	SCL Serial Clock Signal	3
6	MOD_ABS	Module Absent. Grounded within the module	3
7	RS0	Not Connected	3
8	LOS	Loss of Signal	3	Note3
9	V_EER	Receiver ground	1
10	V_EER	Receiver ground	1
11	V_EER	Receiver ground	1
12	RD-	Inv. Received Data Out	3	Note4
13	RD+	Received Data Out	3	Note4
14	V_EER	Receiver ground	1
15	V_CCR	Receiver Power Supply	2
16	V_CCT	Transmitter Power Supply	2
17	V_EET	Transmitter Ground	1
18	TD+	Transmit Data In	3	Note5
19	TD-	Inv. Transmit Data In	3	Note5
20	V_EET	Transmitter Ground	1

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~10kΩresistor 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) Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.

3) LOS is open collector output. Should be pulled up with 4.7k~10kΩ on host board to a voltagebetween 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

4) RD-/+: These are the differential receiver outputs. They are internallyAC-coupled 100 differential lines which should be terminated with 100Ω (differential) at the user SERDES.

5) TD-/+: These are the differential transmitter inputs. They are internallyAC-coupled, differential lines with 100Ω differential termination inside the module.

Recommended Interface Circuit

Mechanical Dimensions

Ordering information

Model No.	Product Description
SFP-S1215L-120	1.25Gbps, 1550nm, LC, 120km, 0ºC~ +70ºC, with DDM
SFP-S1215L-120I	1.25Gbps, 1550nm, LC, 120km, -40ºC~ +85ºC, with DDM