Description
The F-tone Networks 100G BIDI SR QSFP28 optical transceiver is designed for using in 100-Gigabit Ethernet links up to 70m using OM3 and 100m using OM4. It is compliant with the QSFP28 MSA, IEEE802.3cm-2020 and CAUI-4(no FEC)1. Digital diagnostics functions are available via the I2C interface, as specified by the QSFP28 MSA.
The module incorporates 2 channels 850nm/910nm VCSEL and PIN photo detector, transmitting and receiving each optically over one simplex LC fiber using bi-directional optics. This results in an aggregate bandwidth of 100Gbps into a duplex LC cable. This module can convert 4 channels of 25Gbps (NRZ) electrical input data to 2 channels of 50Gbps (PAM4) optical signal, and also can convert 2 channels of 50Gbps (PAM4) optical signal to 4 channels of 25Gbps (NRZ) electrical output data. The electrical interface uses a 38-contact edge type connector. This transceiver is a high performance module for short-range duplex data communication and interconnects applications.

Features
● QSFP28 module form factor
● Support QSFP28 SFF-8436/8636
● 2x53.125Gbps(26.5625GBd) PAM4 parallel optics architecture
● 4x25.78125Gbps NRZ retimed electrical I/O
● Bandwidth density of 100Gbps bi-directional
● 2 channels 850nm/910nm VCSEL and PIN photo detector
● Internal 4:2 Gearbox with KP4 FEC circuits on both receiver and transmitter channels
● Duplex LC connector
● Maximum link length of 100m OM4,70m OM3
● Built-in digital diagnostic functions
● Single 3.3V power supply
● Low power consumption < 4W
● RoHS compliant (lead free)
● Case operating temperature
      Commercial: 0 ~ +70℃
      Industrial: -40 ~ +85℃

Applications
● 100G SR BD applications
● High-speed interconnects within and between switches, routers and transport equipment
● Server-server clusters, super-computing interconnections
● Proprietary backplanes
● Interconnects rack-to-rack, shelf-to-shelf, board-to-board, board-to-optical backplane

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

Ts

-20

85

ºC

Case Operating Temperature

Tc

0

70

ºC

Humidity (non-condensing)

Rh

5

85

%

Recommended Operating Conditions

Parameter

Symbol

Min

Typical

Max

Unit

Supply Voltage

Vcc

3.13

3.3

3.47

V

Operating Case temperature

Tc

0

-

70

ºC

Signal Rate per Electrical Channel (4 x 25G)

-

25.78125

-

Gbps

Signal Rate per Optical Channel (2 x 50G)

-

53.125

-

Gbps

Humidity

Rh

5

-

85

%

Power Dissipation

Pm

-

-

4

W

Fiber Length for OM3

      

-

-

70

m

Fiber Length for OM3

      

-

-

100

m

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 Amplitude1

ΔVin

-

-

1200

mVp-p

Differential Output Voltage Amplitude2

ΔVout

-

-

1200

mVp-p

 Note:

  • Differential input voltage amplitude is measured between TxnP and TxnN.
  • Differential output voltage amplitude is measured between RxnP and RxnN.

Optical Characteristics

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Transmitter

Optical Wavelength CH1

λ1

844

850

863

nm

-

Optical Wavelength CH2

λ2

900

910

918

nm

-

Average launch power

Pavg

-6.2

-

4

dBm

-

Optical Modulation Amplitude(OMA outer)

OMA

-4.2

-

3

dBm

-

Transmitter and dispersion eye closure(TDEC)

TDEC

-

-

4.5

dB

Extinction Ratio

ER

3

-

-

dB

-

Average launch power of OFF transmitter

-

-

-30

 dBm

-

Receiver

Optical Wavelength CH1

λ1

844

850

863

nm

-

Optical Wavelength CH2

λ2

900

910

918

nm

Receiver Sensitivity in  OMA outer

RXsen

     -

-

(-6.6,-3.5)

dBm

1

Average receive power

Pin

-8.2

-

4

dBm

-

Receiver Reflectance

-

-

-12

dB

-

LOS Assert

-

-11

-

dBm

-

LOS De-Assert

-

-9

-

dBm

-

LOS Hysteresis

0.5

-

-

dB

-

Note:Measured with conformance test signal at TP3 for BER = 2.4E-4 Pre-FECs 

Mechanical Dimensions32

Ordering Information

Part Number

Product Description

FTQ2-HG-SRBD

100G QSFP28 BIDI 850/910nm, OM3 70m, OM4 100m, VCSEL+PIN, MMF, Dual LC,0~+70℃

FTQ2-HG-SRBDI

100G QSFP28 BIDI 850/910nm, OM3 70m, OM4 100m, VCSEL+PIN, MMF, Dual LC,-40~+85℃

 

 

 

 

 

 

 

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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.