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2.5G SFP 1310 nm 2 km

Ascent’s 2.5 Gb/s 1310 nm Small Form-Factor Pluggable (SFP) transceiver is a flexible solution as an interface for switches, routers, servers, and other optical links. The transceiver consists of five sections: the LD driver, the limiting amplifier, the digital diagnostics monitor, the 1310 nm FP laser, and the PIN photo-detector. The module can carry data links up to 2 km in a 9/125 µm single mode fiber, and is compatible with the SFP Multi-Sourcing Agreement (MSA).

•    Up to 2.5 Gb/s data links

•    FP laser transmitter and PIN photodetector

•    Up to 2 km on 9/125 µm SMF

•    Hot-pluggable SFP footprint

•    Duplex LC/UPC type pluggable optical interface

•    Low power dissipation

•    Metal enclosure, for lower EMI

•    RoHS compliant and lead-free

•    Supports the Digital Diagnostic Monitoring interface

•    SFF-8472 compliant


Absolute Maximum Ratings

Parameter 

Symbol 

Min. 

Typ. 

Max. 

Unit 

Note 

Storage Temperature 

Ts 

‑40


85

°C 


Relative Humidity 

RH

5


95 


Power Supply Voltage 

VCC

‑0.5



Signal Input Voltage 


‑0.3


Vcc+0.3 


Receiver Damage Threshold 


5



dBm 


Recommended Operating Conditions

Parameter 

Symbol 

Min. 

Typ. 

Max. 

Unit 

Note 

Case Operating Temperature 

Tcase

0


70

°

SFP‑2G‑LP‑31‑2K

‑10


80

SFP‑2G‑LP‑31‑2KE

‑40


85 

SFP‑2G‑LP‑31‑2KA

Power Supply Voltage 

VCC

3.13

3.3 

3.47 


Power Supply Current 

ICC 



280

mA 


Power Supply Noise Rejection




100

mVp‑p

100 Hz to 1 MHz

Data Rate



2500/2500


Mbps

TX Rate/RX Rate

Transmission Distance




 2

kM


Coupled Fiber

Single‑mode fiber

9/125 µm SMF

Transmitter Specifications

Parameter 

Symbol 

Min. 

Typ. 

Max. 

Unit 

Note 

Average Output Power

POUT

‑9


‑3

dBm 

1

Extinction Ratio 

ER 

8.2



dB 


Center Wavelength 

λC 

1270

1310

1360

nm 

FP Laser

Spectrum Bandwidth (RMS)

σ



3.5

nm

Transmitter OFF Output Power 

POff 



‑45

dBm 


Differential Line Input Impedance

RIN

90

100

110

Ω


Output Eye Mask 

Compliant with G.957(class 1 laser safety)


2

Notes:

1: Measured at a 2^23‑1 NRZ PRBS pattern 

2: Transmitter eye mask definition 


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x3‑x2 

0.2

y1

0.25

y2

0.75

y3

0.25

y4

0.25

 Receiver Specifications 

Parameter 

Symbol 

Min. 

Typ. 

Max. 

Unit 

Note 

Input Optical Wavelength 

λIN 

1270


1610

nm 

PIN‑TIA

Receiver Sensitivity 

PIN 



‑18

dBm 

Input Saturation Power (Overload) 

PSAT

‑3



dBm 


Loss of Signal Assert

PA



‑19

dBm 


Loss of Signal De‑assert

PD

‑35



dBm 

LOS Hysteresis 

PA‑PD

 0.5 

dB 


Notes

1: Measured with light source 1310 nm, ER=8.2 dB; BER =< 10^‑12 @PRBS=2^23‑1 NRZ 

2: When LOS de‑asserted, the RX data+/‑ output is high‑level (fixed)

Electrical Interface Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Transmitter 

Total Supply Current 

ICC 



mA 

Transmitter Disable Input‑High 

VDISH

2


Vcc+0.3


Transmitter Disable Input‑Low

VDISL

0


0.8

V


Transmitter Fault Input‑High

VTxFH

2


Vcc+0.3

V


Transmitter Fault Input‑Low

VTxFL

0


0.8 


Receiver 

Total Supply Current 

ICC 



mA 

LOSS Output Voltage‑High

VLOSH

 2 


Vcc+0.3 

LVTTL 

LOSS Output Voltage‑Low

VLOSL

 0 


0.8 

Note:

1: A (TX) + B (RX) = 280 mA (Not include termination circuit) 

Regulatory Compliance 

Feature

Reference

Performance

Electrostatic Discharge(ESD)

IEC/EN 61000‑4‑2

Compatible with standards

Electromagnetic Interference (EMI)

FCC Part 15 Class B EN 55022 Class B (CISPR 22A)

Compatible with standards

Laser Eye Safety

FDA 21CFR 1040.10, 1040.11 IEC/EN 60825‑1, 2

Class 1 laser product

Component Recognition

IEC/EN 60950 , UL

Compatible with standards

ROHS

2002/95/EC

Compatible with standards

EMC

EN61000‑3

Compatible with standards

 


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