Description
F-tone Networks QSFP28 to 4x SFP28 breakout Active Optical Cable offers IT professionals a cost-effective interconnect solution for merging 100G QSFP28 and 25G SFP28 enabled host adapters, switches and servers.
For typical applications, users can install this splitter Active Optical cable between an available QSFP28 port on their 100Gbps rated switch and feed up to four upstream 25GbE-SFP28 enabled switches. Each QSFP28-SFP28 splitter Active Optical cable features a single QSFP28 connector (SFF-8436) rated for 100Gbps on one end and (4) SFP28 connectors (SFF-8431), each rated for 25Gb/s, on the other.

Features
● Electrical interface compliant to SFF-8436 and SFF-8431
● Hot Pluggable
● 850nm VCSEL laser and PIN photo-detector
● Maximum link length of 70m on OM3 MMF and 100m on OM4 MMF
● Internal CDR on both Transmitter and Receiver channel
● Digital diagnostics functions are available via the I2C interface (Optional)
● All-metal housing for superior EMI performance
● RoHS-6 compliant
● Case operating temperature
      Commercial: 0 ~ +70℃
      Industrial: -40 ~ +85℃

Applications
● 40 Gigabit Ethernet
● 25GBASE-SR Ethernet
● Fibre Channel Applications
● InfiniBand QDR, SDR, DDR
● High-performance computing clusters
● Servers, switches, storage and host card adapters

QSFP28 interface Specifications

Parameter

Description

Module Form Factor

QSFP28 (Supports SFF8436)

Data Rate, Each lane

25.78125Gbps

BER

<10-12

Operating Case Temperature

0 to + 70ºC

Storage Temperature

-20 to + 85ºC

Supply Voltage

3.3V

Supply Current

Typical 560mA

Power Dissipation

<2.5W, Level 2

Management Interface Serial

I2C (Supports SFF8436)

Optical and Electrical Characteristics
The following optical characteristics are defined over the Recommended Operating Environment unless otherwise specified.

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Transmitter

Centre Wavelength

λc

840

850

860

nm

-

RMS spectral width

∆λ

-

-

0.60

nm

-

Average launch power, each lane

Pout

-8.4

-

2.4

dBm

-

Optical Modulation Amplitude

(OMA),each lane

OMA

-6.4

3

dBm

-

Transmitter and dispersion eye

closure(TDEC),each lane

TDEC

4.3

dB

Extinction Ratio

ER

3

-

-

dB

-

Average launch power of OFF

transmitter, each lane

-30

dBm

-

Eye Mask coordinates:

   X1, X2, X3, Y1, Y2, Y3

SPECIFICATION VALUES

0.3,0.38,0.45,0.35,0.41.0.5

Hit Ratio = 5x10-5

Differential data input swing

VIN,PP

40

1000

mV

Receiver

Centre Wavelength

λc

840

850

860

nm

-

Stressed receiver sensitivity in OMA, each lane

-5.2

dBm

1

Maximum Average power at receiver input, each lane

2.4

dBm

-

Minimum Average power at

receiver , each lane

-10.3

dBm

Receiver Reflectance

-12

dB

-

LOS Assert

-30

dBm

-

LOS Deassert

-7.5

dBm

-

LOS Hysteresis

0.5

dB

-

Receive Eye Amplitude

300

800

mV

Receive Eye Width

25

Ps

Receive Eye Height

250

mV

Note：1．Measured with conformance test signal at TP3 for BER = 10e-12

SFP28 interface Specifications

Parameter

Description

Module Form Factor

SFP28 (Supports SFF8431/SFF8432/SFF8472)

Channel Data Rate

25.78125Gbps

BER

<10-12

Operating Case Temperature

0 to + 70ºC

Storage Temperature

-20 to + 85ºC

Supply Voltage

3.3V

Supply current

Typical 180mA

Power Dissipation

<1W,Level I

Management Interface Serial

I2C (Supports SFF8472)

Optical and Electrical Characteristics
The following optical characteristics are defined over the Recommended Operating Environment unless otherwise specified.

Parameter

Symbol

Min.

Typical

Max

Unit

Notes

Transmitter

Center Wavelength

λt

840

850

860

nm

RMS spectral width

Pm

-

-

0.6

nm

Average Optical Power

Pavg

-8.4

-

2.4

dBm

Optical Power OMA

POMA

-6.4

3

dBm

Transmitter and dispersion eye

closure(TDEC),each lane

TDEC

4.3

dB

Extinction Ratio

ER

2

-

-

dB

3

Eye Mask coordinates:

X1, X2, X3, Y1, Y2, Y3

SPECIFICATION VALUES

0.3,0.38,0.45,0.35,0.41.0.5

Hit Ratio = 5x10-5

Differential data input swing

VIN,PP

40

1000

mV

Receiver

Center Wavelength

λr

840

850

860

nm

Stressed receiver sensitivity in OMA, each lane

-5.2

dBm

Maximum Average power at receiver input, each lane

2.4

dBm

Minimum Average power at

receiver , each lane

-10.3

dBm

Receiver Reflectance

-

-

-12

dB

LOS De-Assert

LOSD

-7.5

dBm

LOS Assert

LOSA

-30

dBm

LOS Hysteresis

0.5

dB

Receive Eye Amplitude

500

1300

mV

Receive Eye Width

25

Ps

Receive Eye Height

250

mV

Note：1．Measured with conformance test signal at TP3 for BER = 10e-12

Mechanical Dimensions50

Ordering information

Part Number

Product Description

FTQ2-HG-4CS-Oxxx

100G QSFP28 to 4x 25G SFP28 Active Optical Cable,0ºC ~ +70ºC

FTQ2-HG-4CS-OxxxI

100G QSFP28 to 4x 25G SFP28 Active Optical Cable,-40ºC ~ +85ºC

xxx :001~100,1~100 Length in meters. (OM4fiber is available)

Further details are available from any F-tone Networks sales representative.

 

 

 

 

 

 

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Important Notice

Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by F-tone Networks before they become applicable to any particular order or contract. In accordance with the F-tone Networks policy of continuous improvement specifications may change without notice.

The publication of information in this data sheet does not imply freedom from patent or other protective rights of F-tone Networks or others. Further details are available from any F-tone Networks sales representative.