25G SFP28 850 nm 100m

Ascent’s SFP28 25Gb/s transceiver is an integrated fiber optic transceiver that provides a high-speed serial link at signaling rates up to 25.78 Gb/s. It is a single- channel, pluggable, fiber-optic module for short-range data communication and interconnect Ethernet applications. This module is designed to operate over multimode fiber systems using a nominal wavelength of 850nm. It has a transmission distance of up to 70 m on OM3 and 100 m on OM4 multi-mode fibers. The optical interface uses duplex LC receptacle. This module incorporates Gigalight Technologies proven circuit and VCSEL technology to provide reliable long life, high performance, and consistent service. The SFP28-25LP-85-01 module complies with SFF-8431 and SFF 8472 standards. It features a metal enclosure for lower EMI and utilizes a 2-wire interface that is compliant with the serial communication protocol as defined in the SFP+ MSA. It also provides a unique integrated digital diagnostic monitoring interface, allowing for real-time access to device operating parameters. This module is hot-pluggable.

·       25Gbps serial optical interface

·       850nm VCSEL transmitter and GaAs PIN PD receiver

·       Rate Adaptation

·       Operating Temperature Range:

Commercial:0°C to +70°C

Industrial:-40°C to +85°C

·       Maximum link length of 70m via OM3 multimode Fiber (MMF)

·       Maximum link length of 100m via OM4 multimode Fiber (MMF)


Absolute Maximum Ratings

Parameter

Symbol

Min.

Typ.

Max.

Unit

Storage Temperature

Ts

-40

-

85

°C

Relative Humidity

RH

0


85

%


Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Case Temperature

Tc

0

-

70

°C

1

-40

-

85

2

Power Supply Voltage

VCC

3.15

3.3

3.45

V


Bit Rate

BR


25.78125


Gbps


 

Note1, 2: See order information

Optical Characteristics

Parameter

Transmitter

Symbol

 

Min.

 

Typ.

 

Max.

 

Unit

Notes

 

Center Wavelength

λ

840


860

nm


RMS Spectral Width

Pm



0.6

nm


Average Optical Power

Pavg

-5


2.4

dBm


Optical Modulation Amplitude

OMA

-5


3

dBm


Average Launch Power of OFF Transmitter

Poff



0.6

nm


Extinction Ratio

ER

3



dB


Optical Return Loss Tolerance




12

dB


Receiver







Center Wavelength

λ

840

850

860

nm


Damage Threshold


3.4



dBm


Receive Power Overload


2.4



dBm


Receiver Reflectance




-12

dBm


Receiver Sensitivity

SENS



-5

dBm

1

Receiver Sensitivity

SENS



-10

dBm

2

LOS Assert

LOSA

-30



dBm


LOS De-assert

LOSD



-13

dBm


LOS Hysteresis

LOSH

0.5



dB


Note:

1.     Measured with a 25.78125G, PRBS-31 NRZ, ER>3.5dB, BER<1E-12.

2.     Measured with a 25.78125G, PRBS-31 NRZ, ER>3.5dB, BER<5E-5.

Electrical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Power Consumption




1

W


Supply Current

Icc


100

300

mA



Digital Diagnostics

Parameter

Accuracy

Unit

Internally Measured Transceiver Temperature

+/-3

°C

Internally Measured Transceiver Supply Voltage

+/-3

%

Measured Tx bias Current

+/-10

%

Measured Tx Output Power

+/-3

dB

Measured Rx Received Average Optical Power

+/-3

dB


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Series Recommendation