SFP-1.25G-1310nm-2km-MM-LC_Shenzhen Yuhang Communication Technology Co., Ltd

No.1 brand of outdoor industrial switch in China

English





Current location: Home > Products > Accessories > 1.25G SFP transceiver

Product Categories

SFP-1.25G-1310nm-2km-MM-LC

‹

›

‹

›

SFP-1.25G-1310nm-2km-MM-LC

Features

ü Up to 1.25Gbps data links

ü 1310nm FP Laser and PIN photo-detector

ü Up to 2km on 50/125µm MMF

ü Duplex LC receptacle optical interface compliant

ü Hot pluggable

ü All-metal housing for superior EMI performance

ü RoHS6 compliant (lead free)

ü Operating case temperature:

Commercial: -5°C to +70°C

Extended: -20°C to +80°C

Industrial: -40°C to +85°C

Applications

ü Gigabit Ethernet

ü Fiber Channel

ü Switch to Switch interface

ü Switched backplane applications

ü Router/Server interface

ü Other optical transmission systems

Standards

ü Compliant with SFP MSA

ü Compliant with SFF-8472

ü Compatible with IEEE802.3ah 2004

Description

The SFP transceivers are high performance, cost effective modules supporting data-rate of 1.25Gbps and 2km transmission distance with MMF.

The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA and SFF-8472.

Module Block Diagram

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typical	Max.	Unit
Power Supply Voltage	V_CC	0		3.6	V
Storage Temperature	Ts	-40		+85	°C
Operating Case Temperature	Tc	-40		+85	°C
Relative Humidity	RH	0		85	%
RX Input Average Power	P_max	-		0	dBm

Recommended Operating Environment

Parameter		Symbol	Min.	Typical	Max.	Unit
Power Supply Voltage		V_CC	3.13	3.3	3.46	V
Power Supply Current		Icc			300	mA
Operating Case Temperature	Commercial	T_C	-5		+70	°C
	Extended		-20		+80
	Industrial		-40		+85
Data Rate				1.25		Gbps

Electrical Characteristics

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section
Input Differential Impedance	R_in	90	100	110	Ω
Single Ended Data Input Swing	V_i_{n PP}	250		1000	mV	1
Transmit Disable Voltage	V_D	V_cc – 1.3		V_cc	V
Transmit Enable Voltage	V_EN	V_ee		V_ee+ 0.8	V
Receiver Section
Single Ended Data Output Swing	V_out_PP	300		600	mV
LOS Fault	V_{los fault}	V_cc – 0.5		V_{cc_}_host	V	2
LOS Normal	V_{los nor}_m	V_ee		V_ee+0.5	V	2

Notes:

1. Connected directly to TX data input pins. AC coupling from pins into laser driver IC.

2. LOS is an open collector output. Should be pulled up with 4.7kΩ – 10kΩ on the host board. Normal operation is logic 0; loss of signal is logic 1.

Optical Parameters

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section
Centre Wavelength	λc	1260	1310	1360	nm
Spectral Width (RMS)	σ			3	nm
Average Optical Power (avg.)	P_out	-9		-3	dBm	1
Laser Off Power	P_off	-	-	-45	dBm
Extinction Ratio	ER	9	-	-	dB	2
Relative Intensity Noise	RIN	-	-	-128	dB/Hz
Optical Rise/Fall Time	t_r/ t_f		-	260	ps	3
Optical Return Loss Tolerance		-	-	12	dB
Output Optical Eye	Compliant with IEEE802.3z eye masks when filtered					2
Receiver Section
Receiver Center Wavelength	λc	1260		1620	nm
Receiver Sensitivity in Average Power	Sen	-23		-3	dBm	4
Los Assert	LOS_A	-35	-	-	dBm
Los Dessert	LOS_D	-	-	-24	dBm
Los Hysteresis	LOS_H	0.5	-	5	dB
Overload	P_in-max	-	-	-3	dBm	4
Receiver Reflectance		-	-	-12	dB
Receiver Power (damage)		-	-	0	dBm

Notes:

1. The optical power is launched into 50/125µm MMF.

2. Measured with a PRBS 2⁷-1 test pattern @1.25Gbps.

3. Unfiltered, 20-80%. Measured with a PRBS 2⁷-1 test pattern @1.25Gbps.

4. Measured with a PRBS 2⁷-1 test pattern @1.25Gbps, ER=10dB, BER <10-12.

Timing Characteristics

Parameter	Symbol	Min.	Typical	Max.	Unit
TX_Disable Assert Time	t_off			10	us
TX_Disable Negate Time	t_on			1	ms
Time to Initialize Include Reset of TX_FAULT	t_init			300	ms
TX_FAULT from Fault to Assertion	t_fault			100	us
TX_Disable Time to Start Reset	t_reset	10			us
Receiver Loss of Signal Assert Time	T_A, RX_LOS			100	us
Receiver Loss of Signal Deassert Time	T_d, RX_LOS			100	us
Rate-Select Change Time	t_ratesel			10	us
Serial ID Clock Time	f_serial-clock			100	kHz

Digital Diagnostic Monitor Characteristics (DDM)

The following digital diagnostic characteristics are defined over the Recommended Operating Environment unless otherwise specified. It is compliant to SFF8472 Rev10.2 with internal calibration mode. For external calibration mode please contact our sales stuff.

Parameter	Symbol	Min.	Max.	Unit
Temperature Monitor Absolute Error	DMI_Temp	-3	3	°C
Laser Power Monitor Absolute Error	DMI_TX	-3	3	dB
RX Power Monitor Absolute Error	DMI_RX	-3	3	dB
Supply Voltage Monitor Absolute Error	DMI_VCC	-3	3	V
Bias Current Monitor Absolute Error	DMI_Ibias	-10%	10%	mA

Digital Diagnostic Memory Map (Compliant with SFF-8472)

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 (For further information, please refer to SFF-8472).

Pin Definitions

Pin Descriptions

Pin	Signal Name	Description	Plug Seq.	Notes
1	VeeT	Transmitter Ground	1
2	TX FAULT	Transmitter Fault Indication	3	1
3	TX Disable	Transmitter Disable	3	2
4	MOD_DEF(2)	Serial Data Signal SDA	3	3
5	MOD_DEF(1)	Serial Clock Signal SCL	3	3
6	MOD_DEF(0)	Grounded in Module	3	3
7	Rate Select	Not Connected	3
8	LOS	Receiver Loss of Signal Indicator (Active high, open-drain)	3	4
9	VeeR	Receiver Ground	1
10	VeeR	Receiver Ground	1
11	VeeR	Receiver Ground	1
12	RD-	Inv. Received Data Out	3	5
13	RD+	Received Data Out	3	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	6
19	TD-	Inv. Transmit Data In	3	6
20	VeeT	Transmitter Ground	1	2

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;

Between (>0.8V, < 2.0V): Undefined;

High (2.0 to 3.465V): Transmitter Disabled;

Open: Transmitter Disabled.

3. Mod-Def0, 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 SCL.

MOD_DEF (2) is the data line of two wire serial interface for serial ID SDA.

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.

Mechanical Dimensions