Description
F-tone Networks QSFP28 to 2 x QSFP28 breakout Active Optical Cable is a Four-Channel, Parallel, Fiber-Optic QSFP28 SR4 for 100 or 40 Gigabit Ethernet , Infiniband FDR/EDR and 32GFC Applications. This transceiver is a high performance module for short-range multi-lane data communication and interconnect applications. It integrates four data lanes in each direction with 112.2 Gbps bandwidth. Each lane can operate at 28.05Gbps up to 70 m using OM3 fiber or 100 m using OM4 fiber. These modules are designed to operate over multimode fiber systems using a nominal wavelength of 850nm. The electrical interface uses a 38 contact edge type connector. The optical interface uses an 12 fiber MTP (MPO) connector. This module incorporates F-tone Networks Technologies proven circuit and VCSEL technology to provide reliable long life, high performance, and consistent service.

Features
● 4 channels full-duplex transceiver modules
● Transmission data rate up to 28Gbps per channel
● Support 40GE and 56G FDR data rate
● 4 channels 850nm VCSEL array
● 4 channels PIN photo detector array
● Internal CDR circuits on both receiver and transmitter channels
● Support CDR bypass
● Low power consumption : QSFP28-100G < 2.5W and QSFP28-50G <1.6W
● Hot Pluggable QSFP form factor
● Maximum link length of 70m on OM3 Multimode Fiber (MMF)and 100m on OM4 MMF
● Single MPO connector receptacle
● 3.3V power supply voltage
● RoHS 6 compliant(lead free)
● Case operating temperature
     Commercial: 0 ~ +70℃
     Industrial: -40 ~ +85℃

Applications
● IEEE 802.3bm 100GBASE SR4 and 40GBASE SR4
● Infiniband FDR/EDR
● 32G Fiber Channel

Absolute Maximum Ratings

Parameter

Symbol

Min

Max

Unit

Supply Voltage

Vcc

-0.3

3.6

V

Input Voltage 

Vin

-0.3

Vcc+0.3

V

Storage Temperature

Tst

-20

85

ºC

Case Operating Temperature

Top

0

70

ºC

Humidity(non-condensing)

Rh

5

95

%

 

Recommended Operating Conditions

Parameter

Symbol

Min

Typical

Max

Unit

Supply Voltage

Vcc

3.13

3.3

3.47

V

Operating Case temperature

Tca

0

70

ºC

Data Rate Per Lane

fd

25.78125

28.05

Gbps

Humidity

Rh

5

85

%

Power Dissipation QSFP28 end

Pm

2

2.5

W

Power Dissipation Fanout QSFP28 end

1.3

1.6

W

Fiber Bend Radius

Rb

3

cm

 

Electrical Specifications

Parameter

Symbol

Min

Typical

Max

Unit

Differential input impedance

Zin

90

100

110

ohm

Differential Output impedance

Zout

90

100

110

ohm

Differential input voltage amplitude  aAmplitude

ΔVin

300

1100

mVp-p

Differential output voltage amplitude

ΔVout

500

800

mVp-p

Skew

Sw

300

ps

Input Logic Level High

VIH

2.0

VCC

V

Input Logic Level Low

VIL

0

0.8

V

Output Logic Level High

VOH

VCC-0.5

VCC

V

Output Logic Level Low

VOL

0

0.4

V

Note：
1.   Differential input voltage amplitude is measured between TxnP and TxnN.
2.   Differential output voltage amplitude is measured between RxnP and RxnN.

Optical Characteristics 
Table 3 - Optical Characteristics 

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Transmitter

Centre Wavelength

λc

840

850

860

nm

-

RMS spectral width

∆λ

-

-

0.6

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

dB

-

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

Receiver

Centre Wavelength

λc

840

850

860

nm

-

Stressed receiver sensitivity in OMA

-5.2

dBm

1

Maximum Average power at receiver , each lane

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 De-Assert – OMA

-7.5

dBm

-

LOS Hysteresis

0.5

dB

-

 Note：1．Measured with conformance test signal at TP3 for BER = 1e-5

Mechanical Dimensions49

Ordering information

Part Number

Product Description

FTQ2-HG-2Q2-Oxx

QSFP28 to 2 x QSFP28, 100GBASE-SR4, Active Optical Cable  70m on OM3 Multimode Fiber (MMF)and 100m on OM4  Low power version,0ºC ~ +70ºC

FTQ2-HG-2Q2-OxxI

QSFP28 to 2 x QSFP28, 100GBASE-SR4, Active Optical Cable  70m on OM3 Multimode Fiber (MMF)and 100m on OM4  Low power version,-40ºC ~ +85ºC

 

 

 

 

 

 

 

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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.