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2.5G SFP CWDM 40 km

ASCENT SFP-2G-LP-CXX-40 Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). The transceiver consists of five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the CWDM XXnm DFB laser and the PIN photo-detector .The module data link up to 40KM in 9/125um single mode fiber.

•    Up to 2.7 Gbps data links

•    DFB laser transmitter and PIN photo-detector

•    Up to 40 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

•    Single +3.3 V power supply

•    Supports Digital Diagnostic Monitoring interface

•    Compliant with SFF-8472


            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

°C 

Commercial

‑40


85

°C

Industrial

Power Supply Voltage

VCC

3.13

3.3

3.47

V


Power Supply Current

ICC



300

mA


Power Supply Noise Rejection




100

mVp‑p

100 Hz to 1 MHz

Data Rate



2500/2500

2700

Mbps

TX Rate/RX Rate

Transmission Distance




40

km


Coupled Fiber

Single‑mode fiber

9/125 µm SMF

Specification of Transmitter

Parameter 

Symbol 

Min. 

Typ. 

Max. 

Unit 

Note 

Average Output Power

POUT

‑2


3

dBm 

Note (1)

Extinction Ratio 

ER 

8.2



dB 


Center Wavelength 

λC

(1XX0)‑∆λ 

1XX0

(1XX0)+∆λ

nm 

DFB Laser

Note (2)

Side Mode Suppression Ratio

SMSR

30



dB


Spectrum Bandwidth (‑20 dB)

σ



1

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)


Note (3)









Notes:

1. Measure at 2^23‑1 NRZ PRBS pattern 

2. “XX” is: 27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59 and 61; “∆λ” is 10

3. Transmitter eye mask definition 

 


image4.png                                             

x‑ 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 



‑19

dBm 

Note (1) 

Input Saturation Power (Overload) 

PSAT

0



dBm 


LOS De‑assert 

LOSD



‑20

dBm 


LOS Assert 

LOSA

‑35



dBm 

Note (2) 

LOS Hysteresis  


 0.5 

dB 


Notes:

1. Measured with Light source 1XX0 nm, ER=8.2dB; BER =<10^‑12 @PRBS=2^23‑1 NRZ , “XX” is: 27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59 and 61.

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

Electrical Interface Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Transmitter 


Total Supply Current 

ICC 



mA 

Note (1) 

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 

Note (1) 

LOSS Output Voltage‑High

VLOSH

 2 


Vcc+0.3 

LVTTL 

LOSS Output Voltage‑Low

VLOSL

 0 


0.8 

Note:

1. A (TX) + B (RX) = 300 mA    (Not including 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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