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Product Description
25G SFP28 AOC
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25Gbps SFP28 Active Optical Cable

 

Description

  The SFP28 Active Optical Cable (AOC) is a 25Gbps solution to25G Ethernet, and data center. The integrated cable transmits 25Gbps data in each direction over MMF with distance up to 100m. The AOC is SFP+ MSA compliance, low power consumption and lightweight.

 

Features

> Electrical interface compliant to SFF-8431

> 850nm VCSEL laser and PIN photo-detector

> Maximum link length of 70m on OM3 MMF and 100m on OM4 MMF

> Digital diagnostics functions are available via the I2C interface

> Operating case temperature Commercial: 0°C to +70 °C

> +3.3V single power supply

> Power consumption less than 1W

> Password protection for A0h and A2h

 

Standard

> Compliant with SFF-8431 and SFF-8432

> Compliant with SFF-8472 Rev 10.2

> RoHS Compliant

 

Applications

> 25GBASE-SR Ethernet

> Servers,switches,storage and host card adapters

 

Performance Specifications

Absolute Maximum Ratings

These values represent the damage threshold of the module. Stress in excess of any of the individual Absolute Maximum Ratings can cause immediate catastrophic damage to the module even if all other parameters are within Recommended Operating Conditions.

Table.1 Absolute maximum ratings

Parameter

Symbol

Min

Max

Units

Storage temperature

Ts

-40

85

Relative Humidity

RH

5

85

%

Supply Voltage

Vc

-0.3

3.6

V

Supply Current

Icc


450

mA

 

 

 

 

 

 

 

Recommended Operating Conditions

Table.2 Recommended Operating Conditions

Parameter

Symbol

Min

Typical

Max

Unit

Operating Case Temperature

Standard Tc

0

25

70

°C

Power Supply Voltage

Vcc

3.13

3.3

3.47

V

Power Supply Current

Icc


-

300

mA

Power Dissipation

PD


-

1000

mW

Data Rate

DR

8.5

25.78125


Gbps

Transmission Distance

TD



100

m

 

Transmitter Specification

Table.3 Transmitter Specification (Optical)

Parameter

Symbol

Min.

Typ.

Max.

Unit

Average Output Power

Po

-6


2.4

dBm

Disable Power

Poff



-40

dBm

Extinction Ratio

ER

3.5



dB

Output Centre Wavelength

λc

840


860

nm

 

Table.4 Transmitter Specification (Electrical)

Parameter

Symbol

Min

Typical

Max

Unit

Data Input Swing Differential

VIN

200


1600

mV

Input Differential Impedance

ZIN

90

100

110

Ω

Transmit Disable Input

High

VIH

2.0


Vcc+0.3

V

Low

VIL

0


0.8

V

 

Receiver Specification

Table.5 Receiver Specification (Optical)

Parameter

Symbol

Min

Typical

Max

Unit

note

Centre Wavelength

λc

840

850

860

nm


Receiver Sensitivity

Sen



-5.2

dBm

1

Receiver Overload

Psat

2.4



dBm

1

LOS De-Assert

LOSD



-13

dBm


LOS Assert

LOSA

-30



dBm


LOS Hysteresis


0.5


4

dB


Receiver Reflectance

Rrx



-12

dB


Note :1. Measured at BER 10-12, 25Gbps, PRBS2^31-1, NRZ

Table.6 Receiver Specification (Electrical)

Parameter

Symbol

Min

Typical

Max

Unit

note

Data Output Swing Differential

Vout

400


800

mV


Rx-Los Fault

Vlf

2.0


VccHOST

V


Rx-Los Normal

Vln

0


0+0.8

V


Output rise and fall time

Tr, Tf

28



ps


 

 

Diagnostics Specification

 

Table.7 Diagnostics Specification

Parameter

Range

Unit

Accuracy

Calibration

Temperature

0 to 70

±3

Internal / External

Voltage

3.0 to 3.6

V

±3%

Internal / External

Bias Current

0 to 100

mA

±10%

Internal / External

TX Power

-5 to -1

dBm

±3dB

Internal / External

RX Power

-30 to 0

dBm

±3dB

Internal / External

Pin Definitions



image.png

Table.8 Pin Definitions

PIN

Symbol

Description

Remarks

1

VEET

Transmitter ground (common with receiver ground)

Circuit ground is isolated from chassis ground

2

Tx_Fault

Transmitter Fault. Not supported


3

Tx_Disable

Transmitter Disable. Laser output disable on high or open

Disabled: TDIS>2V or open

Enabled: TDIS<0.8V

4

SDA

2-wire Serial Interface Data Line

Should Be pulled up with 4.7k – 10k ohm on host board to a voltage between 2V and 3.6V

5

SCL

2-wire Serial Interface Clock Line

6

MOD_ABS

Module Absent. Grounded within the module.

7

RS0

No connection required


8

RX_LOS

Loss of Signal indication. Logic 0 indicates normal operation

LOS is open collector output

9

RS1

No connection required


10

VEER

Receiver ground (common with transmitter ground)

Circuit ground is isolated from chassis ground

11

VEER

Receiver ground (common with transmitter ground)

12

RD–

Receiver Inverted DATA out. AC coupled


13

RD+

Receiver Non-inverted DATA out. AC coupled


14

VEER

Receiver ground (common with transmitter ground)

Circuit ground is isolated from chassis ground

15

VCCR

Receiver power supply


16

VCCT

Transmitter power supply


17

VEET

Transmitter ground (common with receiver ground)

Circuit ground is isolated from chassis ground

18

TD+

Transmitter Non-Inverted DATA in. AC coupled


19

TD–

Transmitter Inverted DATA in. AC coupled


20

VEET

Transmitter ground (common with receiver ground)

Circuit ground is isolated from chassis ground

 

 

Mechanical Dimensions

 

image.png

Diagram of Mechanical Dimensions

 

 

Order Information

 

P/N

Description

SFP28-AxxM

25G SFP28 to SFP28 AOC Cable OM2/OM3/OM4, xx=0~100meter

 


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