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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).

•    Support ITU-T G.984.2 GPON OLT C++ application

•    Single fiber bi-directional data links with symmetric 2.488Gbps Tx and 1.244Gbps Rx

•    1490 nm continuous-mode transmitter with DFB LD

•    1310 nm burst-mode receiver with APD-TIA

•    2-wire interface for integrated digital diagnostic Monitoring

•    Receiver RESET, Signal Detect, RSSI function indication (RESET,  RX_SD,  RSSI)

•    SFP package with SC/UPC receptacle optical interface

•    Single +3.3 V power supply

•    Operation case temperature 0 to 70°C

•    RoHS6 compliance


Operating Condition

Parameter

Unit

Min.

Typical

Max.

Storage Temperature

°C

‑40


85

Operating Case Temp for C‑temp

°C

0


70

Operating Relative Humidity

%

5


95

Power Supply Voltage

V

3.15

3.3

3.45

Supply Current

mA



600

Bit Rate for Tx

Gbps


2.488


Bit Rate for Rx

Gbps


1.244


 

Characteristics

All performance is specified at whole working temperature and conditions

Parameter

Unit

Min.

Typ.

Max.

Notes

Transmitter






TX Central Wavelength

nm

1480

1490

1500


Spectral Width (‑20dB)

nm



1


Side Mode Suppression Ratio (SMSR)

dB

30




Mean Launched Power

dBm

4.5


10


Mean Launched Power (TX Off)

dBm



‑45


Extinction Ratio

dB

8.2




Optical Return Loss Tolerance

dB

‑12




Transmitter and dispersion Penalty

dB



1


Transmitter Mask 


Compliant With ITU‑T G.984.2

1

Receiver






Receive Wavelength

nm

1290

1310

1330


Sensitivity

dBm



‑30

2

Overload

dBm

‑12



2

Receiver Burst Mode Dynamic Range

dB

15




Damage Threshold for Receiver

dBm

5




SD Assert Level

dBm



‑33


SD De‑assert Level

dBm

‑45




SD Hysteresis

dB

0.5


6


WDM Filter isolation to 1550nm

dB

38




WDM Filter isolation to 1650nm

dB

35




Electrical Interface Characteristics






Data Input Swing Differential/TX

mV

200

‑

2000


Data Output Swing Differential/RX

mV

400


1600


Date Differential Impedance

Ω

90

100

110


LVTTL Output High

V

2.4


Vcc


LVTTL Output Low

V

0


0.4


LVTTL Input High

V

2.0


Vcc+0.3


LVTTL Input Low

V

0


0.8


Timing Characteristics






Guard Time (Tg)

ns

25.6




Reset Pulse Width (Tr)

ns



12.8


Reset Delay (Trd)

ns



12.8


Receiver Preamble Time (Tp)

ns



140


SD Assert Time (TSDA)

ns



100


SD De‑assert Time (TSDD)

ns



12.8


RSSI Trigger Delay (Ttd)

ns

25




RSSI Trigger Pulse Width (Tw)

ns

500




Internal I2C Delay (Twait)

us



500


 Notes:

1. PRBS223‑1 @ 2.488G

2. PRBS223‑1 @ 1.244G, ER=10, BER<10‑10

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