Arista Compatible SFP-25G-SR Quick Spec:

Part Number: SFP-25G-SR

SFP-25G-SR-EXT SFP-25G-SR-IND


Arista SFP-25G-SR Datasheet (25Base, SR, SFP28, MMF, 100m, Dual-LC, COM) Fiber Optic Transceiver

Form Factor: SFP28 TX Wavelength: 850nm Reach: 100m

Cable Type: MMF Rate Category: 25G Interface Type: SR DDM: Yes

Connector Type: Dual-LC


Arista Compatible SFP-25G-SR Features


Arista Compatible SFP-25G-SR Applications


Product Description

The SFP-25G-SR is SFP28 module for duplex optical data, communications up to 25.78Gb/s. It is with the SFP+ 20-pin connector to allow hot plug capability, Digital diagnostic functions are available via an I2C. It has built-in clock and data recovery (CDR). This module is designed for multi-mode fiber and operates at a nominal wavelength of 850 nm. The

transmitter section uses a Vertical Cavity Surface Emitted Laser (VCSEL) and is a Class 1, laser compliant according to International Safety Standard IEC 60825. The receiver section uses, an integrated GaAs detector preamplifier (IDP) mounted in an optical header and a limiting post-amplifier IC.


ABSOLUTE MAXIMUM RATINGS

The operation in excess of any absolute maximum ratings might cause permanent damage to this module.


Parameter

Symbol

Min

Max

Unit

Notes

Storage Temperature

TS

-40

85


Operating Case Temperature

TOP

0

70


Power Supply Voltage

VCC

-0.5

3.6

V


Relative Humidity (non-condensation)

RH

5

85

%



RECOMMENDED OPERATING CONDITIONS


Parameter

Symbol

Min

Typical

Max

Unit

Notes

Operating Case Temperature

TOP

0


70

degC


Power Supply Voltage

VCC

3.135

3.3

3.465

V


Data Rate,




25.7812

5

Gb/s


Data Rate Accuracy


-100


100

ppm


Tx DISABLE Input Voltage –High


2



V


Tx DISABLE Input Voltage – Low




0.8

V


50 / 125 um MMF OM3

D

2


70

m


50 / 125 um MMF OM4

D

2


100

m


Optical Characteristics

All parameters are specified under the recommended operating conditions unless otherwise specified..


Parameter

Symbol

Min

Typical

Max

Unit

Notes

Power Consumption




1.0

W


Supply Current

Icc



300

mA


Transmitter

Centre Wavelength

λC

840

850

860

nm


Spectral Width (RMS)@25Gb/s

Δλ

8.2


0.6

nm


Average Output Power: 50 MMF

Pout

-8.4


2.4

dBm


Extinction Ratio

ER

2



dB


Receiver

Centre Wavelength

λC

840

850

860

nm


Receiver Sensitivity (OMA)

Smin



-8.4

dBm


Average Receiver Power

Pin

-10.3


3

dBm


Optical Return Loss

ORL



-12

At 1MHz


LOS De-Assert

LOSD



-13

dB


LOS Assert

LOSA

-30



dB


LOS Hysteresis


0.5



dB


Digital Diagnostic Functions

Digital diagnostics monitoring function is available on FluxLight’s product. A 2-wire serial interface provides user to contact with module. It is compliant to SFF-8472 Rev10.2 with internal calibration mode. For external calibration mode please contact our sales stuff.


Parameter

Symbol

Min

Max

Unit

Notes

Temperature monitor absolute error

DMI_Temp

-3

+3


Supply voltage monitor absolute error

DMI_VCC

-0.1

+0.1

V


TX power monitor absolute error

DMI_RX

-3

+3

dB


RX power monitor absolute error

DMI_RX

-3

+3

dB


Bias current monitor

DMI_Ibias

-10%

+10%

mA



Recommended Circuit



Arista SFP-25G-SR Datasheet (25Base, SR, SFP28, MMF, 100m, Dual-LC, COM) Fiber Optic Transceiver

Mechanical Dimensions


image

(Unit: mm [inch])

Pin Assignment and Description


Arista SFP-25G-SR Datasheet (25Base, SR, SFP28, MMF, 100m, Dual-LC, COM) Fiber Optic Transceiver


Pin Assignment


PIN #

Symbol

Description

Notes

1

VeeT

Transmitter Ground


2

TX_Fault

N/A

1

3

TX_DIS

Transmitter Disable

2

4

SDA

Tow Wire Serial Data


5

SCL

Tow Wire Serial Clock


6

MOD_DEF0

Module present, connect to VeeT


7

RS0

N/A

1

8

LOS

LOS of Signal

2

9

RS1

N/A

1

10

VeeR

Reciever Ground


11

VeeR

Reciever Ground


12

RD-

Reciever Data Inverted


13

RD+

Reciever Data Non-Inverted


14

VeeR

Reciever Ground


15

VccR

Reciever Supply 3.3V


16

VccT

Transmitter Supply 3.3V


17

VeeT

Transmitter Ground


18

TD+

Transmitter Data Non-Inverted


19

TD-

Transmitter Data Inverted


20

VeeT

Transmitter Ground


Notes:

  1. Signals not supported in SFP+ Copper pulled-down to VeeT with 30K ohms resistor

  2. Passive cable assemblies do not support LOS and TX_DIS

Licensing

The following U.S. patents are licensed by Finisar to FluxLight, Inc.:

U.S. Patent Nos: 7,184,668, 7,079,775, 6,957,021, 7,058,310, 6,952,531, 7,162,160, 7,050,720