1.25G SFP Optical Module

   The 1.25G SFP optical module is  Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). They simultaneously comply with Gigabit Ethernet as specified in IEEE Std 802.31 and 1x and 2x Fiber Channel as defined in FC-PI 13.03.
The 1000BASE-LX/LH (long wavelength/long haul) SFP module interfaces fully comply with the IEEE 802.3z 1000BASE-LX standard.Their higher optical quality allows them to reach 6.2 miles (10 km) to 62.1 miles(100km) over single-mode fiber (SMF) .

Features:

      l       Up to 1.25Gb/s bi-directional data links

      l       Hot-pluggable SFP footprint

      l       1310/1550nm FP/DFB, SM Fiber

       l       Duplex LC connector
l       Very low jitter
 l       Up to 100km on 9/125μm SMF
l       Metal enclosure, for lower EMI
l       Single 3.3V power supply
l       Low power dissipation <700mW typical

Application:

 

• Switch to switch interface
• High speed I/O for file servers .
• Bus extension applications

Description:

The Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). They simultaneously comply with Gigabit Ethernet as specified in IEEE Std 802.31 and 1x and 2x Fiber Channel as defined in FC-PI 13.03.

Absolute Maximum Ratings:

Parameter	Symbol	Min	Typ	Max	Unit	Ref.
Maximum Supply Voltage	Vcc	0.5		4.5	V
Storage Temperature	TS	-40		100	℃
Case Operating Temperature	TOP	-40		85	℃
Relative Humidity	RH	0		85	%	1

 Electrical Characteristics (TOP = -40 to 85 ℃, VCC = 3.00 to 3.60 Volts)

Parameter	Symbol	Min	Typ	Max	Unit	Ref.
Supply Voltage	Vcc	3.00		3.60	V
Supply Current	Icc		200	300	mA
Transmitter
Input differential impedance	Rin		100		Ω	2
Single ended data input swing	Vin,pp	250		1200	mV
Transmit Disable Voltage	VD	Vcc – 1.3		Vcc	V
Transmit Enable Voltage	VEN	Vee		Vee+ 0.8	V	3
Transmit Disable Assert Time				10	us
Receiver
Single ended data output swing	Vout,pp	300	400	800	mV	4
Data output rise time	tr		100	175	ps	5
Data output fall time	tf		100	175	ps	5
LOS Fault	VLOS fault	Vcc – 0.5		VccHOST	V	6
LOS Normal	VLOS norm	Vee		Vee+0.5	V	6
Power Supply Rejection	PSR	100			mVpp	7
Deterministic Jitter Contribution	RX Δ DJ			51.7	ps	8
Total Jitter Contribution	RX Δ TJ			122.4	ps

Notes:

1. Non condensing.
2. AC coupled.
3. Or open circuit.
4. Into 100 ohm differential termination.
5. 20 – 80 %
6. LOS is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
7. All transceiver specifications are compliant with a power supply sinusoidal modulation of 20 Hz to 1.5 MHz up to specified value applied through the power supply filtering network shown on page 23 of the Small Form-factor Pluggable (SFP) Transceiver MultiSource Agreement (MSA), September 14, 2000.
8. Measured with DJ-free data input signal. In actual application, output DJ will be the sum of input DJ andDDJ.

Optical Characteristics (TOP = 0 to 70℃, VCC = 3.00 to 3.60 Volts)

Parameter Symbol Min Typ Max Unit Ref. Transmitter Output Opt. Power POUT -9 -3 dBm 1 Optical Wavelength λ 1270 1310 1360 nm 2 Spectral Width σ 3 nm 2 Optical Modulation Amplitude OMA 174 μW 2,3 Optical Rise/Fall Time tr/ tf 100 160 ps 4 RIN -120 dB/Hz Deterministic Jitter Contribution TX Δ DJ 20 56.5 ps 5 Total Jitter Contribution TX Δ TJ 70 119 ps Optical Extinction Ratio ER 9 dB Receiver Average Rx Sensitivity @ 2.125 RSENS1 -21 dBm 6, 7 Gb/s (2X Fiber Channel) Average Rx Sensitivity @ 1.25 Gb/s RSENS2 -22 dBm 6, 7 (Gigabit Ethernet) Average Rx Sensitivity @ 1.06 Gb/s RSENS1 -22 dBm 6, 7 (1X Fiber Channel) Stressed RX sens. =1.25 Gb/s -18 -14.5 dBm Average Received Power RxMAX 0 dBm Receiver Elec. 3 dB cutoff freq. 1500 MHz Optical Center Wavelength λC 1265 1600 nm Return Loss 12 dB LOS De-Assert LOSD -23 -19 dBm LOS Assert LOSA -30 -25 dBm LOS Hysteresis 0.5 dB Notes: 1. Class 1 Laser Safety per FDA/CDRH and EN (IEC) 60825 regulations. 2. Also specified to meet curves in FC-PI 13.0 Figures 18 and 19, which allow trade-off between wavelength, spectral width and OMA. 3. Equivalent extinction ratio specification for Fiber Channel. Allows smaller ER at higher average power. 4. Unfiltered, 20-80%. Complies with IEEE 802.3 (Gig. E), FC 1x and 2x eye masks when filtered. 5. Measured with DJ-free data input signal. In actual application, output DJ will be the sum of input DJ and DDJ. 6. Measured with conformance signals defined in FC-PI 13.0 specifications. 7. Measured with PRBS 27-1 at 10-12 BER