This document provides specifications for the SFP-1G-BX20D-49/31-T02 1G Tx1490nm/Rx1310nm 20km BiDi SFP Transceiver. It includes details on its product description, features, functional diagram, electrical and optical characteristics, pin definitions, digital diagnostic specifications, typical interface circuit, and package dimensions. The transceiver supports 1.25Gbps/1.0625Gbps bit rates and bidirectional transmission over a single mode fiber for up to 20km.
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LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
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1. SFP-1G-BX20D-49/31-T02#151016
Guilin GLsun Science and Tech Group Co., LTD.
Tel: +86-773-3116006 info@glsun.com Web: www.glsun.com
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1G Tx1490nm/Rx1310nm 20km BiDi SFP Transceiver
Specification Revision Record
Date Version Page Revision Description Prepare Approve
20210706 1.0 Zhang S
All right reserved by Guilin GLsun Science and Tech Group Co., LTD. Without written permission,
any unit or individual can’t reproduce, copy or use it for any commercial purpose.
Product 1G Tx1490nm/Rx1310nm 20km BiDi SFP Transceiver
Model SFP-1G-BX20D-49/31-T02
File No. SFP-1G-BX20D-49/31-T02#151016
Version 1.0
Issuing Date 2021-7-6
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2. SFP-1G-BX20D-49/31-T02#151016
Guilin GLsun Science and Tech Group Co., LTD.
Tel: +86-773-3116006 info@glsun.com Web: www.glsun.com
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Product Description
SFP-1G-BX20D-49/31-T02 SFP-BIDI transceivers are high performance, cost effective modules
supporting dual data-rate of 1.25Gbps/1.0625Gbps and 20km transmission distance with SMF. The
transceiver consists of three sections: a FP/DFB 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.
Product Feature
Supports 1.25Gbps/1.0625Gbps bit rates
Bi-Directional LC connector
Hot pluggable SFP footprint
1490nm DFB laser and 1310nm PIN photo detector
Applicable for 20Km SMF 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: 0 to 70 °C (commercial)
Application
Gigabit Ethernet
Fiber Channel
Switch to Switch interface
Switched backplane applications
Router/Server interface
Other Optical Links
3. SFP-1G-BX20D-49/31-T02#151016
Guilin GLsun Science and Tech Group Co., LTD.
Tel: +86-773-3116006 info@glsun.com Web: www.glsun.com
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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 Characteristic
Parameter Symbol Min Typ Max Unit Note
Supply Voltage Vcc 3.13 3.3 3.47 V
Supply Current Icc 220 mA
Data Rate DR 1.0625 1.25 Gb/s
Operating Case Temperature Tc 0 70 °C Commercial
4. SFP-1G-BX20D-49/31-T02#151016
Guilin GLsun Science and Tech Group Co., LTD.
Tel: +86-773-3116006 info@glsun.com Web: www.glsun.com
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Electrical Characteristics (TOP(C) = 0 to 70 ℃, TOP(I) =-40 to 85 ℃,VCC = 3.13 to 3.47 V)
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
1270 1310 1360
nm
1470 1490 1510
Ave. output power (Enabled) PAVE -9 -3 dBm 1
Extinction Ratio ER 9 dB 1
Side-Mode Suppression Ratio SMSR 30 dB 1490nm
RMS spectral width
1310nm( FP)
Δλ 3 nm
Parameter Symbol Min. Typ Max. Unit Note
Transmitter
Differential data input swing VIN,PP 120 820 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 340 650 800 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.
5. SFP-1G-BX20D-49/31-T02#151016
Guilin GLsun Science and Tech Group Co., LTD.
Tel: +86-773-3116006 info@glsun.com Web: www.glsun.com
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RMS spectral width
1490nm( DFB)
1 nm
Rise/Fall time (20%~80%) Tr/Tf 0.26 ns 2
Dispersion penalty TDP 3.9 dB
Output Optical Eye Compliant with IEEE802.3 z (class 1 aser safety)
Receiver
Operating Wavelength λ
1470 1490 1510
nm
1270 1310 1360
Receiver Sensitivity PSEN1 -23 dBm 3
Overload PAVE -3 dBm 3
LOS Assert Pa -35 dBm
LOS De-assert Pd -24 dBm
LOS Hysteresis Pd-Pa 0.5 dB
Notes:
1.Measured at 1.25Gb/s with PRBS 2 223 – 1NRZ test pattern.
2.Unfiltered, measured with a PRBS223 – 1
test pattern @1.25Gbps
3.Measured at 1.25Gb/s with PRBS 223 – 1
NRZ test pattern for BER < 1x10-12
Pin Definition And Functions
6. SFP-1G-BX20D-49/31-T02#151016
Guilin GLsun Science and Tech Group Co., LTD.
Tel: +86-773-3116006 info@glsun.com Web: www.glsun.com
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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
7. SFP-1G-BX20D-49/31-T02#151016
Guilin GLsun Science and Tech Group Co., LTD.
Tel: +86-773-3116006 info@glsun.com Web: www.glsun.com
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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 – 10K
Ω 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 100
Ω differential termination inside the module. The AC coupling is done inside the module and is thus
not required on the host board.
8. SFP-1G-BX20D-49/31-T02#151016
Guilin GLsun Science and Tech Group Co., LTD.
Tel: +86-773-3116006 info@glsun.com Web: www.glsun.com
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Digital Diagnostic Specifications
The SFP-1G-BX20D-49/31-T02#151016 transceivers can be used in host systems that require
either internally or externally calibrated digital diagnostics.
Parameter Symbol Units Min. Max. Accuracy Note
Transceiver temperature DTemp-E ºC -45 +90 ±5ºC 1
Transceiver supply voltage DVoltage V 2.8 4.0 ±3%
Transmitter bias current DBias mA 2 80 ±10% 2
Transmitter output power DTx-Power dBm -12 0 ±3dB
Receiver average input power DRx-Power dBm -26 0 ±3dB
Notes:
1.When Operating temp.=0~70 ºC,the range will be min=-5,Max=+75
2.The accuracy of the Tx bias current is 10% of the actual current from the laser driver to the laser
3.Internal/ External Calibration compatible.
Typical Interface Circuit
9. SFP-1G-BX20D-49/31-T02#151016
Guilin GLsun Science and Tech Group Co., LTD.
Tel: +86-773-3116006 info@glsun.com Web: www.glsun.com
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Package Dimensions
Wavelength Latch Color
TX 1310nm Blue
TX 1490nm Violet
Ordering Information
Part Number Description
SFP-1G-BX20D-49/31-T02
SFP BIDI, 1.25G, 1490/1310nm, 20Km, 0~70℃,
with Digital Diagnostic Monitor