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XGSPON N2 SFP Transceiver

The XGSPON N2 & GPON C+ Combo SFP+ is a dual-mode optical transceiver that supports both next-gen XGSPON and legacy GPON in a single compact SFP+ module. Designed for smooth network evolution, it enables operators to serve GPON and XGSPON users simultaneously—without hardware changes. Fully compliant with ITU-T G.984.5 (2014)/Amd.2 (10/2020) standards, this hot-pluggable module delivers high reliability, low power consumption, and excellent optical sensitivity. It integrates easily into major OLT platforms, supporting flexible deployments across a wide range of environments. With the XGSPON N2 & GPON C+ Combo SFP+, service providers can cut upgrade costs, extend infrastructure lifespan, and accelerate rollout of ultra-fast broadband—all with one simple solution. The transceiver is a combination of XGS-PON OLT and GPON OLT optical transceiver in an SFP+ housing. It is designed to support both the XGS-PON OLT and the GPON OLT specifications over a single fiber via coarse wave division multiplexing. The XGS-PON bidirectional link is configured with 1270nm/1577nm optics and the GPON link is configured with 1310nm/1490nm optics. The 1270nm and 1310nm optical burst mode receivers incorporate APD/TIA optics for maximum sensitivity. The 10G transmitter incorporates a 1577nm EML laser assembly and the 2.5G transmitter incorporates a 1490nm DFB laser assembly. The transmitters can be controlled by the LVTTL Tx_DISABLE function and the receivers incorporates the LVTTL Rx_SD output. The transceiver is designed to support up to 32/64 subscribers over distances of up to 20km.

·       SFP+ Package

·       3.3V DC power supply

·       4 Lambda

·       SC receptacle optical connector

·       Hot pluggable

·       2x10 SFP+ Electrical Interface

·       ITU-T G.984.2 Class C+ compliant

·       ITU-T G.987.2 Class C+ compliant

·       ITU-T G.9807.1 Class C+ compliant

·       1577nm CW Mode EML
          o   9.95328Gb/s data rate
          o   LVCML AC Coupled input

·       1490nm CW Mode DFB Laser
          
o   2.48832Gb/s data rate
          o   LVPECL AC Coupled input

·       1270nm Burst Mode APD/TIA receiver
          
o   9.95328 or 2.48832Gb/s data rate
          o   LVCML DC Coupled output

·       1310nm Burst Mode APD/TIA receiver
          
o   1.24416Gb/s data rate
          o   LVPECL DC Coupled output

·       LVTTL Tx_Disable

·       LVTTL Rx_SD_GPON

·       LVTTL Rx_SD_XGS-PON

·       LVTTL Rx_RSSI_Tri

·       LVTTL Rx_Reset_GPON

·       Tri-level Ratesel/Reset_XGSPON

 



Absolute Maximum Ratings

Parameter

Symbol

Min.

Max.

Unit

Note

Storage Ambient Temperature

Tstg

-40

+85

°C

1

Relative Humidity - Storage

RHS

5

90

%

1

Relative Humidity - Operating

RHO

5

85

%

1

Module Supply Voltage

Vcc3

0

3.6

V

1

Notes1: Exceeding the Absolute Maximum Ratings may cause irreversible damage to the device. The device is
              not intended to be operated under the condition of simultaneous Absolute Maximum Ratings, a condition
              which may cause irreversible damage to the device.


 Absolute Maximum Ratings: Control Function Logic Levels

Parameter

Symbol

Min.

Max.

Unit

Note

Tx_DISABLE

Tx_Dis

0

Vcc3+0.5

V

LVTTL

Burst Mode Signal Detect

Rx_SD

0

Vcc3+0.5

V

LVTTL

Rx_Reset

Rx_Reset

0

Vcc3+0.5

V

Signal Ended LVTTL input

Digital Rx_RSSI_Trigger Input

TRI

0

Vcc3+0.5

V

Single Ended LVTTL Input

I2C Serial Data

SDA

0

Vcc3+0.5

V

Single Ended LVTTL I/O

I2C Serial Clock

SCL

0

Vcc3+0.5

V

Single Ended LVTTL Input


Recommended Operating Conditions

Parameter

Symbol

Min.

Typ

Max.

Unit

Note

Case Operating Temperature

TCASE

0

-

+70

°C

SFPP-XG-SP-N2



-40

-

+85


SFPP-XG-SP-N2A

Module Supply Voltage

Vcc3

3.135

3.3

3.465

V


Module Supply Current   

Icc3

-

750

-

mA


Power Consumption

P



3.5

W



Transmitter Electrical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Tx Differential Input Impendence

ZIN

90

100

110

Ω


10Gb/s Tx Differential Input Amplitude

VIN10  

120

-

800

mV


2.5Gb/s Tx Differential Input Amplitude

VIN1

300

-

800

mV


Tx_Dis = HIGH (Transmitter OFF / DISABLED)

VTDH

2.0

-

VCC3

V

LVTTL (Control INPUT)

Tx_Dis = LOW (Transmitter ON / ENABLED)

VTDL

0

-

0.8

V

LVTTL (Control INPUT)


Receiver Electrical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Rx Differential Output Impendence

ZOUT

90

100

110

Ω


10Gb/s Rx_Data Differential Output Voltage Amplitude

VOUT10

300

-

850

mV

LVCML

1.25Gb/s Rx_Data Differential Output Voltage Amplitude

VOUT1

600

-

1600

mV

LVPECL

Rx_SD = HIGH (Receiver ON)

VOH

2.0

-

VCC3

V

LVTTL (Monitor OUTPUT)

Rx_SD = LOW (Receiver OFF)

VOL

0

-

0.8

V

LVTTL (Monitor OUTPUT)

Ratesel/Reset=HIGH

VIH

1.9

-

VCC3

V

Tri-level (Control INPUT)

Ratesel/Reset=Middle

VIM

1.2

-

1.6

V

Tri-level (Control INPUT)

Ratesel/Reset=LOW

VIL

0

-

0.9

V

Tri-level (Control INPUT)

TRI=HIGH

VIH

0.7*VCC3

-

VCC3

V

LVTTL (Control INPUT)

TRI=LOW

VIL

0

-

0.8

V

LVTTL (Control INPUT)

 
9.95328Gb/s Transmitter Optical Characteristic

Parameter

Symbol

Min.

Typ.

Max.

Unit

Conditions / Notes

Laser Type


1577nm CW EML



Downstream Signal Rate


9.95328

Gb/s


Average Launch Power

POUT10

5

-

8

dBm


Optical Center Wavelength

λ10

1575

-

1581

nm


Spectral Width

Δλ10

-

-

1.0

nm


Side Mode Suppression Ratio

SMSR10

30

-

-

dB


Extinction Ratio

ER10

8.2


-

dB


Output Eye Diagram

Compliant with ITU-T G.987.2 &ITU-T G.9807.1


 
2.48832Gb/s Transmitter Optical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Conditions / Notes

Laser Type


1490nm CW DFB Laser



Downstream Signal Rate


2.48832

Gb/s


Average Launch Power

POUT2

3

-

7

dBm


Optical Rise and Fall Time

Tr / Tf

-

-

200

ps

20% to 80%

Optical Center Wavelength

λ1

1480

-

1500

nm


Spectral Width

Δλ1

-

-

1.0

nm


Side Mode Suppression Ratio

SMSR1

30

-

-

dB


Extinction Ratio

ER1

8.2

-

-

dB


Output Eye Diagram

Compliant with ITU-T G.984.2



9.95328/2.48832Gb/s Receiver Optical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Receiver Type


1270nm APD/TIA Receiver



Upstream Signal Rate


9.95328/2.48832

Gb/s


Optical Center Wavelength

λ

1260

-

1280

nm


XGS-PON Receiver Sensitivity

PIN    

-

-

-29

dBm

1

XG-PON Receiver Sensitivity

PIN    

-

-

-30.5

dBm

2

XGS-PON Receiver Optical Overload*

PIN(SAT)    

-8

-

-

dBm


XG-PON Receiver Optical Overload*

PIN(SAT)

-10

-

-

dBm


Damaged Input Optical Power

Pd

-

-

-5

dBm


Rx_SD Assert

PA

-45

-

-31

dBm


Rx_SD De Assert

PD

-45

-

-31

dBm


Rx_SD Hysteresis

PHy

0.5

-

7

dBm


Notes:
         1: BER@10-3  *, Test Condition: PRBS: 231-1, ER=6 dB.
         2: BER@10-4 *, Test Condition: PRBS: 223-1, ER=8.2 dB.

1.24416Gb/s Receiver Optical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Receiver Type


1310nm Burst APD/TIA Receiver



Upstream Signal Rate


1.24416

Gb/s


Optical Center Wavelength

λ

1290

1310

1330

nm


Receiver Sensitivity

PIN

-

-

-30

dBm

1

Receiver Sensitivity


-

-

-32

dBm

2

Receiver Optical Overload *

PIN(SAT)

-12

-

-

dBm


Damaged Input Optical Power

Pd

-

-

-5

dBm


Rx_SD Assert

PA

-45

-

-32.5

dBm


Rx_SD De Assert

PD

-45

-

-32.5

dBm


Rx_SD Hysteresis

PHy

0.5

-

7

dB


 Notes:
            
1: BER@10-10 *, PRBS: 223-1, ER=10dB.
            
2: BER@10-4 *, PRBS: 223-1, ER=10dB.
image.png
image.png

Receiver Timing Diagram  

Parameter

Symbol

Min

Typ.

Max

Units

Notes

Guard Time (GPON)

Tg

25.6

-

-

ns


Guard Time (XGS-PON)

Tg

51.2

-

-

ns


Reset Pulse Width (GPON)  

Tw

25.6

-

-

ns


Reset Pulse Width (XGS-PON)  

Tw

25.6

-

-

ns

1  

Reset to Ranging ONU Optical Time  

Trto

0



ns


Reset Delay Time During Ranging  

Trdr

0



ns


Reset time overlapping preamble

t_overlap

0

-

-

ns


Setup time of rate level for following burst

t_setup

5

-

-

ns


Burst Signal Detect Assert (GPON)  

T_SDA

-

-

25.6

ns


Burst Signal Detect Assert (XGS-PON)  

T_SDA

-

20

100

ns


Burst Signal Detect De-assert (GPON)  

T_SDD

-

12.8

25.6

ns


Burst Signal Detect De-assert (XGS-PON) 

T_SDD

-

-

100

ns

2

Burst Mode Receiver Setting Time (GPON)  

Tsettle  

-

-

25.6

ns


Burst Mode Receiver Setting Time (XGS- PON)  

Tsettle  

-

100

-

ns


 Notes:
            
1: Reset pulse is required to be partially inside preamble.
            2: Auto reset function is applied. Signal detect de-assert time is about 100ns forced by auto reset, and will short to about 20ns with external Reset pulse.

 

Digital RSSI Sample/Hold Timing
image.png
 

Parameter

Symbol

Min

Typ.

Max

Units

Notes

Optical Input Signal Width

Tont

525

-

-

ns


RSSI Trigger Delay

Ttri (TRI Delay)

25

-

3000

ns


RSSI Trigger Width

TI2C (TRI Width)

500

-

Tont – Ttri

ns


I2C Protect Time

Tp

500

-

-

μs


RSSI Monitor Range

Pmon

-8

-

-29

dBm

XGS-PON


Pmon

-10

-

-31

dBm

XGPON


Pmon

-12

-

-32

dBm

GPON

RSSI Precision

Prssi

-3

+/-2

3

dB



Note: 
Ttri+TI2c<Tont.

 



image.png

SFP+ Connector Dimensions

image.png



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