Sign in

Sign in
Reset PasswordCreate an Account

Create an Account

Create an Account
Sign in

GPON OLT SFP 2.5G Class C+ 20 km

ASCENT’s GPON OLT transceiver SFP-GG-SP-4931 C+ is designed for optical line terminal (OLT) for ITU-T G.984.2 Class C+ requirements Network transmission. The optical transceiver is compliant with the Small Form- Factor Pluggable (SFP) Multi- Source Agreement (MSA). The GPON OLT SFP module is contained in a SFP package with SC/UPC receptacle connector. The module consists 1490 nm DFB laser, InGaAs APD, Preamplifier and WDM filter in a high-integrated optical sub-assembly, and it transmit up to 2.5 Gbps of continuous data at 1490 nm, and receives 1.25 Gbps burst-mode data at 1310 nm. The module data link up to 20 km in 9/125 µm single-mode fiber. Ascent GPON SFP is a low cost point to multi point (P2MP) Fiber to the Home, Business or Curb (FTTX) GPON OLT transceiver. It is fabricated with a rugged die cast metal housing and cage assembly. Commercial and industrial temperature ranges are available. It is IEC 60825-1 Class I laser safety compliant and meets the EEC Directive 2002/95/EC for RoHS compliance.

    Single-fiber bi-directional data links asymmetric TX 2488 Mbps / RX 1244 Mbps application

     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

    Single 3.3V power supply

    DDMI function available with internally calibrated mode

    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

    International Class1 laser safety certified

    Operating temperature range:

     Commercial: -5°C to 70°C

    Complies with EU Directive 2015/863/EU

    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



Absolute Maximum Ratings

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Storage Ambient Temperature

TSTG

-40


85

°C


Storage Humidity

HS

0


90

°C


Operating Humidity

Ho

5


85

%


Power Supply Voltage

VCC

0


3.6

V


Receiver Damaged Threshold


+4



dBm


Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Operating Case Temperature

TC

-5


70

°C


Power Supply Voltage

VCC

3.13

3.3

3.47

V


Power Consumption

PW



1.65

W


Data Rate



TX 2.488 /

RX 1.244


Gbps


Electrical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Total Supply Current

ICC



500

mA


Transmitter

Transmitter Differential Input Voltage


400


2400

mV


Tx_Fault Output Voltage - High

VOH

2.4


Vcc

V

LVTTL

Tx_Fault Output Voltage - Low

VOL

0


0.4

V

LVTTL

Tx_Disable Input Voltage - High

VIH

2


Vcc

V

LVTTL

Tx_Disable Input Voltage - Low

VIL

0


0.8

V

LVTTL

Input Differential Impedance

ZIN

85

100

115

Ω


Receiver

Receiver Differential Output Voltage


600


1600

mV

LVPECL, DC Coupled

SD Output Voltage - High

VOH

2.4


Vcc

V

LVTTL

SD Output Voltage - Low

VOL

0


0.4

V

LVTTL

Reset Input Voltage - High

VIH

2.0


Vcc

V

LVTTL

Reset Input Voltage - Low

VIL

0


0.8

V

LVTTL

RSSI Trigger Input Voltage - High

VIH

2.0


Vcc

V

LVTTL

RSSI Trigger Input Voltage - Low

VIL

0


0.8

V

LVTTL

Output Differential Impedance

ZOUT

90

100

110

Ω


Optical and Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Transmitter

Average Output Power

POUT

+3


+7

dBm


Center Wavelength

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

Transmitter OFF Power

POFF



-39

dBm


Output Eye Diagram

Compliant with ITU-T G.984.2

Transmitter Reflectance




-10

dB


Receiver

Center Wavelength

λC

1260


1360

nm


Receiver Sensitivity

SEN



-30

dBm

1

Input Saturation Power (Overload)

SAT

-12



dBm


Dynamic Range


15



dB

Figure of Burst Mode Receiver Dynamic Range in GPON System

Receiver Reflectance




-15

dB


Notes:
    
1.       PRBS 223-1+72CID @1244Mbps, transmitter is operating, BER ≤1×10-10.

Burst Mode Receiver Dynamic Range in GPON System
image.png
Burst Receiver Timing Sequence
image.png

image.png
Receiver Timing Characteristics


Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Guard Time

TG

32



bit


Reset Pulse Width

TR


16


bit

1

Receiver Amplitude Recovery

Time

TSETTLE



24

bit

2


TSETTLE_E



16

bit


Signal Detect Assert Time

TA



25

ns


Signal Detect De-Assert Time

TD



10

ns


Notes:
    1.       Reset pulse support 2 modes in Burst Receiver Timing Sequence figure.
    2.       SD signal pulls down immediately after Reset signal, and pulls up while detected RX burst signal till the next Reset signal.
image.png
RSSI Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

RSSI Trigger-Low


0


0.8

V


RSSI Trigger-High


2.0


Vcc

V


RSSI Trigger Delay

TD

0


3000

ns


Optical Signal During Time

TONT

300



ns


RSSI Trigger Width

TW

300


TONT - TD

ns


I2C Access Prohibited Time

Tp



500

μs



image.png
image.png

Series Recommendation
Related Information

Get in touch with our experts

Feedback