Sign in

Sign in
Reset PasswordCreate an Account

Create an Account

Create an Account
Sign in

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.

    Supports up to 25.7813 Gb/s bit rates

    Up to 70 m transmission distance on OM3

    Up to 100 m transmission distance on OM4

    VSCEL laser and PIN receiver

    Metal enclosure, for lower EMI

    2-wire interface with integrated Digital Diagnostic monitoring

    Hot-pluggable SFP+ footprint

    Specifications compliant with SFF 8431 and SFF 8472

    Compliant with SFP+ MSA with LC connector

    Single 3.3 V power supply

Absolute Maximum Ratings 

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Storage Temperature

Ts

‑40

85

°C

1

Operating Temperature

TOP

0

70

°C


Relative Humidity

RH

0

85

%

2

Power Supply Voltage

VCC

‑0.5

3.6

V


Notes:

1. Limited by the fiber cable jacket, not the active ends.

2. Non‑condensing.

 

Optical Characteristics (TOP = 0 °C to +70 °C, VCC = 3.3 V ± 5 %)

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Transmitter







Center Wavelength

λC

840

850

860

nm


Side Mode Suppression Ratio

SMSR

30



dB


Spectral Width

Pm



1

nm


Average Output Power

Pavg

‑8.4


2.4

dBm


Optical Modulation Amplitude (OMA)

POMA

‑6.4


3

dBm


Extinction Ratio

ER

2



dB


Transmitter Dispersion Penalty

TDEC



4.3

dB


Optical Return Loss Tolerance

TOL



20

dB


Transmitter OFF Output Power

POFF



‑30

dBm


Transmitter Eye Mask Definition

{X1, X2, X3, Y1, Y2, Y3}, Hit ratio 1.5E‑3

{0.3, 0.38, 0.45, 0.35, 0.41, 0.5}

Receiver







Center Wavelength

λc

840

850

860

nm


Receiver Stress Sensitivity, OMA




‑5.2

dBm


Receiver Sensitivity, Average Power




‑10.3

dBm


Receiver Reflectance

Rfl



‑26

dBm


Loss of Signal Assert

PA

‑30



dBm


Loss of Signal De‑assert

PD

‑13

dBm




LOS Hysteresis

PD‑ PA

0.5

dB


dB


 

Electrical Characteristics  (TOP = 0 °C to +70 °C, VCC = 3.3 V ± 5 %)

Parameter

Symbol

Min

Typ

Max

Unit

Notes

Supply Voltage

VCC

3.135

3.3

3.465

V


Supply Current

ICC



300

mA


Transmitter







Input Differential Impedance

Rin


100


Ω

1

Differential Data Input Swing

Vin, pp

100


800

mV


Transmit Disable Voltage

VD

2


VCC

V


Transmit Enable Voltage

VEN

Vee


Vee+0.8

V


Receiver







Differential Data Output Swing

Vout, pp

100


400

mV

2

LOS Fault

VLOS_fault

2


VccHOST

V

3

LOS Normal

VLOS_norm

Vee


Vee+0.8

V

3

Power Supply Noise Tolerance

VCCT/VCCR

Per SFF‑8431 Rev 4.1

4

Notes: 

1. Connected directly to TX data input pins. AC coupled thereafter. 

2. Into 100 Ω differential termination. 

3. LOS is an open collector output. Should be pulled up with 4.7 kΩ to 10 kΩ on the host board. Normal operation is logic 0; loss of signal is logic 1. Maximum pull‑up voltage is 5.5V.

4. Testing methodology per SFF‑8431. Rev 4.1.

image.png
                                Recommended Interface Circuit       

Series Recommendation
Related Information

Get in touch with our experts

Feedback