Generic Compatible 1000BASE-SX SFP 850nm 550m DOM Duplex LC MMF Optical Transceiver Module

SPECIFICATIONS
Product Model	SFP-1.25-85-055-LCD	Manufacturer Brand	PHILISUN
Package Type	SFP	Optical Connector	Duplex LC
Max Data Rate	up to 1.25Gbps	Channel Data Rate	-
Effective Transmission Distance	550M
Wavelength	850nm	Operating Voltage	3.3V
Fiber Type	MMF	Core Size	50/125µm
Transmitter Type	VCSEL	Receiver Type	IDP
TX Power	-9.5~-3dbm	Receiver Sensitivity	-17dbm
Digital Diagnostic Monitoring(DDM)	YES	Receiver Overload	-3dBm
Power Consumption	<1W	Protocols	SFP MSA
Operating temperature(Commercial)	0℃~+70℃	Storage Temperature(Commercial)	-40℃~+85℃
Operating temperature(Industrial)	-40℃~+85℃	Storage Temperature(Industrial)	-40℃~+85℃

PRODUCT PRESENTATION

The PHILISUN SFP 1.25G 850nm 550m LC DX Transceiver series is a compact multi-mode module designed for high-speed bi-directional optical data communication, supporting 550m transmission distance; these small form-factor pluggable (SFP) modules are compatible with Gigabit Ethernet 1000BASE-SX and Fiber Channel FC-PH-2 standards (100-M5-SN-1/100-M6-SN-1), featuring a 20-pin connector enabling hot-plug functionality. Optimized for multi-mode fiber operation at 850nm wavelength, the transmitter integrates a Vertical Cavity Surface Emitting Laser (VCSEL) compliant with IEC-60825 Class 1 laser safety standards, while the receiver incorporates an advanced optical detection system with integrated GaAs detector preamplifier (IDP) mounted in an optical header and precision limiting post-amplifier IC.

TRANSCEIVER SERIES PRODUCTS

PRODUCTION & TESTING EQUIPMENT

PERFORMANCE PARAMETER

Absolute Maximum Ratings
Parameter	Symbol	Min.	Max.	Unit
Storage temperature	TS	-4.0	+85	℃
Supply voltage	VCC	-0.5	3.6	V
Operating relative humidity	–	–	95	%
Exceeding any one of these values may destroy the device immediately

Recommended Operating Environment
Operating case temperature		Tc	SFP-1.25-85-055-LCD	0	–	+70	°C
				-40	–	+85
Power supply voltage		Vcc		3.15	3.3	3.45	V
Power supply current		Icc		–	–	300	mA
Date rate	GBE	–		–	1.25	–	Gbps
	FC			–	1.063	–

Performance Specifications – Electrical
Parameter		Symbol	Min.	Typ.	Max.	Unit	Notes
Transmitter
LVPECL inputs(Differential)		Vin	500	–	2000	mVpp	AC coupled inputs
Input impedance (Differential)		Zin	85	100	115	ohm	Rin > 100 kohm @ DC
TX_disable	Disable	–	2	–	Vcc	V	–
TX_disable	Enable	–	0	–	0.8	V	–
TX_FAULT	Fault	–	2	–	Vcc+0.3	V	–
TX_FAULT	Normal	–	0	–	0.5	V	–
Receiver
LVPECL outputs (Differential)		Vout	370	–	2000	mVpp	AC coupled output
Output impedance (Differential)		Zout	85	100	115	ohms	–
RX_LOS	LOS	–	2	–	Vcc+0.3	V	–
RX_LOS	Normal	–	0	–	0.8	V	–
MOD_DEF ( 2:0 )		VoH	2.5	–	–	V	With serial ID
MOD_DEF ( 2:0 )		VoL	0	–	0.5	V	With serial ID

Optical and Electrical Characteristics
Parameter	Symbol	Min.	Typical	Max.	Unit
50µm core diameter MMF	L	–	550	–	m
Data rate	–	–	1.063/1.25	–	Gbps
Transmitter
Center wavelength	λC	830	850	860	nm
Spectral width (RMS)	Δλ	–	–	0.85	nm
Average output power	Pout	-9.5	–	-3	dBm
Extinction ratio	ER	9	–		dB
Rise/Fall time(20%～80%)	tr/tf	–	–	260	ps
Total jitter	TJ	–	–	0.43	UI
Output optical eye	IEEE802.3z and ANSI fiber channel compliant
TX disable assert time	t_off	–	–	10	us
Receiver
Center wavelength	λC	760	–	860	nm
Receiver sensitivity	Pmin	-3	–	-17	dBm
Receiver overload	Pmax	–	–	–	dBm
Return loss	–	12	–	–	dB
LOS de-assert	LOSD	–	–	-18	dBm
LOS assert	LOSA	-35	–	–	dBm
LOS hysteresis	–	1	–	–	dB

FUNCTIONAL DESCRIPTION OF TRANSCEIVER

SFP TRANSCEIVER ELECTRICAL PAD LAYOUT

PIN FUNCTION DEFINITIONS

Pin	Name	Function	Plug Seq.	Notes
1	VeeT	Transmitter ground	1	5)
2	TX Fault	Transmitter fault indication	3	1)
3	TX Disable	Transmitter disable	3	2) Module disables on high or open
4	MOD-DEF2	SDA	3	3) 2 wire serial ID interface.
5	MOD-DEF1	SCL	3	3) 2 wire serial ID interface.
6	MOD-DEF0	MOD_ABS	3	3) Grounded within the module.
7	Rate Select	Not connect	3	Function not available
8	LOS	Loss of signal	3	4)
9	VeeR	Receiver ground	1	5)
10	VeeR	Receiver ground	1	5)
11	VeeR	Receiver ground	1	5)
12	RD-	Inv. received data out	3	6)
13	RD+	Received data out	3	7)
14	VeeR	Receiver ground	1	5)
15	VccR	Receiver power	2	7) 3.3V ± 5%
16	VccT	Transmitter power	2	7) 3.3V ± 5%
17	VeeT	Transmitter ground	1	5)
18	TD+	Transmit data In	3	8)
19	TD-	Inv. transmit data In	3	8)
20	VeeT	Transmitter ground	1	5)
Notes: 1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor on the host board. Pull up voltage between 2.0V and VccT/R+0.3V. When high, output indicates a laser fault of some kinds. Low indicates normal operation. In the low state, the output will be pulled to < 0.8V. 2) TX disable is an input that is used to shutdown the transmitter optical output. It is pulled up within the module with a 4.7K – 10 KΩ resistor. Its states are: Low (0 – 0.8V): Transmitter on (>0.8, < 2.0V): Undefined High (2.0 – 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 – 10K resistor on the host board. The pull-up voltageshall 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/drain output, which should be pulled up with a 4.7K – 10KΩ resistor. Pull up voltage between 2.0V and VccT/R+0.3V. When high, this output indicates the received optical power is below the worst-case receiver sensitivity (as defined by the standard in use).Low indicates normal operation. In the low state, the output will be pulled to < 0.8V. 5) VeeR and VeeT may be internally connected within the SFP module. 6) 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. 7) VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V ±5% at the SFP connector pin. Maximum supply current is 300Ma. Recommended host board power supply filtering is shown below. Inductors with DC resistance of less than 1ohm should be used in order to maintain the required voltage at the SFP input pin with 3.3V supply voltage. When the recommended supply-filtering network is used, hot plugging of the SFP transceiver module will result in an inrush current of no more than 30Ma greater than the steady state value.VccR and VccT may be internally connected within the SFP transceiver module. 8) TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ω differential termination inside the module.