Mylinking™ Optical Transceiver Module SFP LC-MM 850nm 550m

ML-SFP-MX 1.25Gbps SFP 850nm 550m LC Multi-Mode

Short Description:

The Mylinking™ RoHS Compliant 1.25Gbps 850nm Optical Transceiver 550m Reach are high performance, cost effective modules supporting data-rate of 1.25Gbps and 550m transmission distance with MMF. The transceiver consists of three sections: a VCSEL 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.

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Product Detail

Product Tags

Product Features

● Supports 1.25Gbps/1.0625Gbps bit rates

● Duplex LC connector

● Hot pluggable SFP footprint

● 850nm VSCEL laser transmitter and PIN photo-detector

● Applicable for 550m on 50/125µm, 300m on 62.5/125µm MMF connection

● Low power consumption, < 0.8W

● Digital Diagnostic Monitor Interface

● Compliant with SFP MSA and SFF-8472

● Very low EMI and excellent ESD protection

● Operating case temperature:

Commerical:0 to 70 °C

Industrial:-40 to 85 °C

Applications

● Gigabit Ethernet

● Fiber Channel

● Switch to Switch interface

● Switched backplane applications

● Router/Server interface

● Other optical transmission systems

Functional Diagram

Absolute Maximum Ratings

Parameter	Symbol	Min.	Max.	Unit	Note
Supply Voltage	Vcc	-0.5	4.0	V
Storage Temperature	TS	-40	85	°C
Relative Humidity	RH	0	85	%

Note: Stress in excess of the maximum absolute ratings can cause permanent damage to the transceiver.

General Operating Characteristics

Parameter	Symbol	Min.	Typ	Max.	Unit	Note
Data Rate	DR		1.25		Gb/s
Supply Voltage	Vcc	3.13	3.3	3.47	V
Supply Current	Icc₅			220	mA
Operating Case Temp.	Tc	0		70	°C
Operating Case Temp.	TI	-40		85	°C

Electrical Characteristics (TOP(C) = 0 to 70 ℃, TOP(I) =-40 to 85 ℃,VCC = 3.13 to 3.47 V)/h2>

Parameter	Symbol	Min.	Typ	Max.	Unit	Note
Transmitter
Differential data input swing	VIN,PP	250		1200	mVpp	1
Tx Disable Input-High	VIH	2.0		Vcc+0.3	V
Tx Disable Input-Low	VIL	0		0.8	V
Tx Fault Output-High	VOH	2.0		Vcc+0.3	V	2
Tx Fault Output-Low	VOL	0		0.8	V	2
Input differential impedance	Rin		100		Ω
Receiver
Differential data output swing	Vout,pp	250		550	mVpp	3
Rx LOS Output-High	VROH	2.0		Vcc+0.3	V	2
Rx LOS Output-Low	VROL	0		0.8	V	2

Notes:

1. TD+/- are internally AC coupled with 100Ω differential termination inside the module.

2. Tx Fault and Rx LOS are open collector outputs, which should be pulled up with 4.7k to 10kΩ resistors on the host board. Pull up voltage between 2.0V and Vcc+0.3V.

3.RD+/- outputs are internally AC coupled, and should be terminated with 100Ω (differential) at the user SERDES.

Optical Characteristics (TOP(C) = 0 to 70 ℃, TOP(I) =-40 to 85 ℃,VCC = 3.13 to 3.47 V)

Parameter	Symbol	Min.	Typ	Max.	Unit	Note
Transmitter
Operating Wavelength	λ	840	850	860	nm
Ave. output power (Enabled)	PAVE	-9		0	dBm	1
Extinction Ratio	ER	9			dB	1
RMS spectral width	Δλ			0.65	nm
Rise/Fall time (20%~80%)	Tr/Tf			0.25	ps	2
Output Optical Eye	Compliant with IEEE802.3 z &ITU G.957 Compliant (class 1 aser safety)
Receiver
Operating Wavelength	λ	840	850	860	nm
Receiver Sensitivity	PSEN1			-18	dBm	3
Overload	PAVE	-3			dBm	3
LOS Assert	Pa	-35			dBm
LOS De-assert	Pd			-20	dBm
LOS Hysteresis	Pd-Pa	0.5			dB

Notes:

1. Measured at 1.25Gb/s with PRBS 223 – 1 NRZ test pattern.

2.Unfiltered, measured with a PRBS 223-1 test pattern @1.25Gbps

3.Measured at 1.25Gb/s with PRBS 223 – 1 NRZ test pattern for BER < 1x10-10

Pin Definitions And Functions

Pin	Symbol	Name/Description	Notes
1	VeeT	Tx ground
2	Tx Fault	Tx fault indication, Open Collector Output, active “H”	1
3	Tx Disable	LVTTL Input, internal pull-up, Tx disabled on “H”	2
4	MOD-DEF2	2 wire serial interface data input/output (SDA)	3
5	MOD-DEF1	2 wire serial interface clock input (SCL)	3
6	MOD-DEF0	Model present indication	3
7	Rate select	No connection
8	LOS	Rx loss of signal, Open Collector Output, active “H”	4
9	VeeR	Rx ground
10	VeeR	Rx ground
11	VeeR	Rx ground
12	RD-	Inverse received data out	5
13	RD+	Received data out	5
14	VeeR	Rx ground
15	VccR	Rx power supply
16	VccT	Tx power supply
17	VeeT	Tx ground
18	TD+	Transmit data in	6
19	TD-	Inverse transmit data in	6
20	VeeT	Tx ground

Notes:

1. When high, this output indicates a laser fault of some kind. Low indicates normal operation. And should be pulled up with a 4.7 – 10KΩ resistor on the host board.

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 4.7 – 10KΩ resistor. Its states are:

Low (0 – 0.8V): Transmitter on (>0.8, < 2.0V): Undefined

High (2.0V~Vcc+0.3V): 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 between 2.0V~Vcc+0.3V.

Mod-Def 0 has been 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. When high, this output indicates loss of signal (LOS). Low indicates normal operation.

5. RD+/-: These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should be terminated with 100Ω (differential) at the user SERDES. The AC coupling is done inside the module and is thus not required on the host board.

6. TD+/-: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ω differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board.