Light Optics
Building a brighter future
LO-SG5D3-20LD
1.25Gb/s Bi-Directional SFP Transceiver
20km 1000BASE-BX-D
Product Features

Compliant with IEEE Std 802.3-2005
1000BASE-BX10-D

Digital Diagnostic Monitoring available

Specifications according to SFF-8074i and
SFF-8472, revision 9.5

Uncooled 1550nm DFB Laser

Up to 1.25Gb/s bi-directional data links

Up to 20km on 9/125µm SMF

Simplex LC connector compliant

Single +3.3V DC power supply

Hot-pluggable SFP footprint

Class 1 laser safety certified

Operating temperature Options

- (Commercial) -10oC to +70oC
Applications
RoHS Compliant

1000BASE-BX10-D

Point to Point FTTH

Fast Ethernet
Ordering Information
Part Number
LO-SG5D3-20LD
Transmitter
1550nm DFB
Output Power Receiver
-9 ~ -3dBm
Sensitivity
PIN
< -23dBm
1
Reach
20km
Temp
o
-10 ~ 70 C
DDM
RoHS
Available
Compliant
Light Optics
Building a brighter future
LO-SG5D3-20LD
1.25Gb/s Bi-Directional SFP Transceiver
20km 1000BASE-BX-D
Absolute Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Unit
Storage Temperature
TS
-40
85
o
Relative Humidity
RH
5
95
%
Supply Voltage
VCC
-0.5
4.0
V
C
Recommended Operating Conditions
Parameter
Operating Case Temperature
Symbol
Min
Typ
Max
-10
25
70
VCC
3.135
3.3
3.465
V
-
-
1.25
-
Gb/s
TC
LO-SG5D3-20LD
Supply Voltage
Data Rate
Unit
o
C
Transceiver Electrical Characteristics
Parameter
Symbol
Minimum
Typical
Maximum
Unit
Notes
Module Supply Current
Transmitter Differential Input
Voltage (TD +/-)
Receiver Differential Output Voltage (RD
+/-)
Low speed output:
Transmitter Fault(TX_FAULT) /
Loss of Signal (LOS)
Icc
-
-
220
mA
-
-
300
-
2200
mVP-P
1
-
600
-
1200
mVP-P
2
VOH
2.0
-
Vcc
V
3
VOL
0
-
0.8
V
-
VIH
2.0
-
Vcc
V
4
VIL
0
-
0.8
V
-
Low speed iutput:
Transmitter Disable (TX_DISABLE),
MOD_DEF 1, MOD_DEF 2
Notes:
1.
Internally AC coupled and terminated to 100Ω differential load.
2.
Internally AC coupled, but requires a 100Ω differential termination or internal to Serializer/Deserializer.
3. Pulled up externally with a 4.7KΩ-10KΩ resistor on the host board to VCCT,R.
4.
Mod_Def1 and Mod_Def2 must be pulled up externally with a 4.7KΩ-10KΩ resistor on the host board to VCCT,R.
2
Light Optics
Building a brighter future
LO-SG5D3-20LD
1.25Gb/s Bi-Directional SFP Transceiver
20km 1000BASE-BX-D
Transmitter Optical Characteristics
Parameter
Symbol
Minimum
Typical
Maximum
Unit
Notes
Launch Optical Power
Po
-9
-6
-3
dBm
-
Center Wavelength Range
λc
1500
1550
1600
nm
-
Extinction Ratio
EX
9
-
-
dB
-
Spectral Width (-20dB)
Δλ
-
-
1
nm
-
Side Mode Suppression Ratio
SMSR
30
-
-
dB
-
Optical Rise/Fall Time
Trise/Tfall
-
-
260
ps
-
Poff
-
-
-45
dBm
-
Pout @TX-Disable Asserted
Eye Diagram
IEEE Std 802.3-2005 1000BASE-BX10-D compatible
3
Light Optics
Building a brighter future
LO-SG5D3-20LD
1.25Gb/s Bi-Directional SFP Transceiver
20km 1000BASE-BX-D
Receiver Optical Characteristics
Parameter
Symbol
Minimum
Typical
Maximum
Unit
Notes
Wavelength Range
-
1260
1310
1360
nm
-
Receiver Sensitivity
S
-
-
-23
dBm
1
Receiver Overload
POL
-3
-
-
dBm
1
Optical Return Loss
ORL
12
-
-
dB
-
LOS De-Assert
LOSD
-
-
-24
dBm
-
LOS Assert
LOSA
-35
-
-
dBm
-
-
0.5
3
5
dB
-
LOS Hysteresis
Notes:
1. Measured with PRBS 223-1 test pattern, 1.25Gb/s, EX=9dB, BER<10-10.
Mechanical specifications
Figure 5. Outline Drawing
4
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