SFP GPON OLT Transceiver Class D 8dBm TX Power Optical Modules DDM

Basic Information
Place of Origin: Shenzhen, China
Brand Name: Gigaopto
Certification: CE,FCC,RoHs, TUV,UL
Model Number: GTS-SGT21-20DCF
Minimum Order Quantity: 1
Price: negotiable
Packaging Details: Single Package,10 or 20pcs per Tray,30 or 50 or 100pcs per box, 400 or 600pcs per carton
Delivery Time: 1-5 work days
Supply Ability: 50,000pcs/month
Detail Information
Product Name: GPON SFP Transceiver Type: Class D 8dBm
Data Rate(Gb/s): TX2.5Gb/s/RX1.25Gb/s Wavelength: 1490nm-TX/1310nm-RX
Connector: Simplex SC Diagnostic: Supported
Keywords: +8dBm Class D GPON OLT SFP Transceiver Module
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SFP GPON OLT Transceiver


DDM GPON OLT Transceiver


8dBm Optical Modules

Product Description

GPON OLT SFP Class D TX Power 8dBm Transceiver Modules Part Number GTS-SGT21-20DCF





This 8dBm Tx Power GPON OLT SFP is full compliant with ITU G.984.2 Class D/C+++ requirements for optical line terminal (OLT) applications with 1.244Gbps upstream and 2.488Gbps downstream.

This GPON D SFP packaging module consists of 1490nm continuous-mode 2.488Gbps DFB transmitter, 1310nm burst-mode 1.244Gbps APD receiver, Preamplifier and WDM filter in a high-integrated optical sub-assembly. It is a Class 1 laser Product comply with the IEC 60825-1 and IEC 60825-2, and it is MSA SFP, SFF-8472 and ROHS6 compliant.





Product Name GPON OLT SFP Module Class Type Class D/C+++
Packaging SFP Power Supply Voltage +3.3V
Connector SC Simplex Max Reach 20km
DDM/DOM Supported Fiber Type single mode fiber
Warranty 3 Years Operating Temperature -5~70°C/ -40~85°C
Data Rate (TX) 2.488Gbps Data Rate (RX) 1.244Gbps
Wavelength (TX) 1490nm Wavelength (RX) 1310nm
Power Consumption <1.5W Total Current 450mA (Max)
Transmitter DFB Receiver APD
TX Out Power (dBm) +6.0~+10.0dBm RX Sensitivity < -32.0dBm
Ext. Ratio >8.2dB Receiver Overload >-15dBm
Protocols SFF-8472, ITUT-984.2





  • Single fiber bi-directional data links asymmetric TX 2488Mbps/RX1244Mbps application
  • 1490nm continuous-mode DFB laser transmitter and 1310nm burst-mode APD-TIA receiver
  • Small Form Factor Pluggable package with SC/UPC Connector
  • Operating case temperature Range:Commercial: -5°C~70°C, Industrial: -40°C~85°C
  • Single 3.3V power supply
  • Digital diagnostic monitoring interface
  • Digital burst RSSI function to monitor the input optical power level
  • LVPECL compatible data input/output interface
  • LVTTL transmitter disable control
  • LVTTL transmitter laser fault alarm
  • Fast LVTTL receiver Signal Detect (SD) indication response
  • Low EMI and excellent ESD protection
  • Class I laser safety standard IEC-60825 compliant
  • RoHS6 Compliance




  • Gigabit-capable Passive Optical Networks (GPON)




  • Complies with SFP Multi-Source Agreement (MSA) SFF-8074i
  • Complies with ITU-T G.984.2 Amendment 1
  • Complies with FCC 47 CFR Part 15, Class B
  • Complies with FDA 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated June 24, 2007
  • Complies with SFF-8472
  • Compatible with TR-NWT-000870 4.1 ESD sensitivity classification Class2.
  • Compatible with Telcordia GR-468-CORE


Optical transmitter Characteristics
Parameter Symbol Min Typical Max Unit Notes
Launched Power (avg.) POUT +6 +8 +10 dBm  
Operating Wavelength Range λC 1480   1500 nm  
Spectral Width (-20dB) ∆λ     1 nm  
Side Mode Suppression Ratio SMSR 30        
Extinction Ratio ER 8.2     dB PRBS 223-1+72CID @2.488Gbit/s
Transmitter and Dispersion Penalty TDP     1 dB Transmit on 20km SMF
Optical Output Power after TX Disable PDIS     -39 dBm  
Output Eye Diagram Compliant with ITU-T G.984.2
Transmitter Reflectance       -10 dB  
Optical Receiver Characteristics
Parameter Symbol Min Typical Max Unit Notes
Wavelength Range λC 1260   1360 nm  
Receiver Sensitivity SEN     -32 dBm Note1
Optical Power Input Overload SAT -15     dBm Note1
Dynamic Range   15     dB Figure 1
Receiver Reflectance       -15 dB  
Note 1: PRBS 223-1+72CID @1244Mbps, transmitter is operating, BER ≤1×10-10



Typical Application Circuit


SFP GPON OLT Transceiver Class D 8dBm TX Power Optical Modules DDM 0



EEPROM Memory Map


SFP GPON OLT Transceiver Class D 8dBm TX Power Optical Modules DDM 1



EEPROM Serial ID Memory Contents


The optical transceiver contains an EEPROM. It provides access to sophisticated identification information that describes the transceiver’s capabilities, standard interfaces, manufacturer, and other information. When the serial protocol is activated, the host generates the serial clock signal (SCL, Mod Def 1). The positive edge clocks data into those segments of the EEPROM that are not writing protected within the SFP transceiver. The negative edge clocks data from the SFP transceiver. The serial data signal (SDA, Mod Def 2) is bi-directional for serial data transfer. The host uses SDA in conjunction with SCL to mark the start and end of serial protocol activation. The memories are organized as a series of 8-bit data words that can be addressed individually or sequentially.

The Module provides diagnostic information about the present operating conditions. The transceiver generates this diagnostic data by digitization of internal analog signals. Calibration and alarm/warning threshold data is written during device manufacture. Received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring all are implemented. The diagnostic data are raw A/D values and must be converted to real world units using calibration constants stored in EEPROM locations 56 - 95 at wire serial bus address A2h. The digital diagnostic memory map specific data fields define as following.



Ordering information - Gigaopto’s GPON OLT SFP Series(DFB+APD TX-2.488Gbps/RX-1.244Gbps/TX-1490nm/RX-1310nm SC Simplex)


P/N Class Tx Power Rx Sensitivity Temperature
GTS-SGT21-20DCB B+ +1.5~+5.0dBm < -28.0dBm Com
GTS-SGT21-20DIB B+ +1.5~+5.0dBm < -28.0dBm Ind.
GTS-SGT21-20DCC C+ +3.0~+7.0dBm < -30.0dBm Com
GTS-SGT21-20DIC C+ +3.0~+7.0dBm < -30.0dBm Ind.
GTS-SGT21-20DCD C++ +4.5~+10.0dBm < -31.0dBm Com
GTS-SGT21-20DID C++ +4.5~+10.0dBm < -31.0dBm Ind.
GTS-SGT21-20DCE C+++ / D +6.0~+10.0dBm < -32.0dBm Com
GTS-SGT21-20DIE C+++ / D +6.0~+10.0dBm < -32.0dBm Ind.
Note OEM/ODM Supported,You Are Always Welcome to Contact Us.


Contact Details

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