Description
The F-tone Networks 100GBASE-LR4 Lite 4km QSFP28 optical transceiver, 100G QSFP28 LR4L (FTQ2-HG-LR4Lxx) is designed for use in 100-Gigabit Ethernet links up to 4km on Single Mode Fiber (SMF). It is compliant with the QSFP28 MSA, IEEE 802.3ba 100GBASE-LR4, and IEEE 802.3bm CAUI-4. Digital diagnostics functions are available via the I2C interface, as specified by the QSFP28 MSA. It converts 4 input channels of 25.78125Gb/s electrical data to 4 channels of LAN-WDM optical signals and then multiplexes them into a single channel for 103.125Gb/s optical transmission. Reversely on the receiver side, the module de-multiplexes a 103.125Gb/s optical input into 4 channels of LAN-WDM optical signals and then converts them to 4 output channels of electrical data. The central wavelengths of the 4 LAN-WDM channels are 1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm as members of the LAN-WDM wavelength grid defined in IEEE 802.3ba.

Features
● Hot-pluggable QSFP28 form factor
● 4 channels full-duplex transceiver module
● Supports 103.125Gb/s aggregate bit rate
● 4 channels DFB-based LAN-WDM cooling transmitter
● 4 channels PIN ROSA
● Internal CDR circuits on both receiver and transmitter channels
● 3.5W maximum power dissipation
● Maximum link length of 4km on SMF
● Duplex LC receptacle
● Single 3.3V power supply
● RoHS-6 compliant (lead free)
● Case operating temperature
     Commercial: 0 ~ +70℃
     Industrial: -40 ~ +85℃

Applications
● 100GBASE-LR4 Lite 100G Ethernet

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

%

Damage Threshold (each lane)

THd

5.5

dBm

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

Data Rate Per Lane

fd

25.78125

Gb/s

Humidity

Rh

5

85

%

Power Dissipation

Pm

3.5

W

Link Distance with G.652

D

0.002

2

km

Electrical Specifications

Parameter

Symbol

Min

Typical

Max

Unit

Supply Current

Icc

1.06

A

Transceiver Power-on Initialization Time1

2000

ms

Transmitter (each Lane)

Single-ended Input Voltage Tolerance

-0.3

4.0

V

AC Common Mode Input Voltage Tolerance

15

mV

Differential Input Voltage

50

mVp-p

Differential Input Voltage Swing

Vin

900

mVp-p

Differential Input Impedance

Zin

90

100

110

Ohm

Receiver (each lane)

Single-ended Output Voltage

-0.3

4.0

V

AC Common Mode Output

7.5

mV

Differential Output Voltage Swing

Vout

300

850

mVp-p

Differential Output Impedance

Zout

90

100

110

Ohm

Note:1. Power-on Initialization Time is the time from when the power supply voltages reach and remain above the minimum recommended operating supply voltages to the time when the module is fully functional.

Optical Characteristics 

Parameter

Symbol

Min

Typical

Max

Unit

Lane Wavelength

L0

1294.53

1295.56

1296.59

nm

L1

1299.02

1300.05

1301.09

nm

L2

1303.54

1304.58

1305.63

nm

L3

1308.09

1309.14

1310.19

nm

Transmitter

Side Mode Suppression Ratio

SMSR

30

dB

Total Average Launch Power

PT

10.5

dBm

Average Launch Power (each Lane)

PAVG

-4.3

4.5

dBm

Optical Modulation Amplitude1 (each lane)

POMA

-1.3

4.5

dBm

Difference in Launch Power

Ptx,diff

5

dB

Launch Power in OMA minus TDP

-2.3

dBm

Transmitter and Dispersion Penalty (TDP) (each lane)

TDP

2.2

dB

Extinction Ratio

ER

4

dB

Relative Intensity Noise

RIN

-130

dB/Hz

Optical Return Loss Tolerance

TOL

20

dB

Transmitter Reflectance

RT

-12

dB

Average Launch Power of OFF transmitter (each lane)

POFF

-30

dBm

Eye Mask Coordinates2: X1, X2, X3, Y1, Y2, Y3

{0.25, 0.4, 0.45, 0.25, 0.28, 0.4}

Receiver

Damage Threshold3 (each lane)

THd

3.5

dBm

Total Receive Power

10.5

dBm

Average Receive Power (each lane)

-10.6

4.5

dBm

Receive Power (OMA) (each lane)

4.5

dBm

Receiver Sensitivity (OMA) (each lane)

SEN

-8.6

dBm

Stressed Receiver Sensitivity (OMA)4 (each Lane)

-6.8

dBm

Difference in Receive Power between any Two Lanes (OMA)

Prx,diff

5.5

dB

LOS Assert

LOSA

-18

dBm

LOS De-Assert – OMA

LOSD

-15

dBm

LOS Hysteresis

LOSH

0.5

dB

Receiver Electrical 3 dB upper Cutoff Frequency (each Lane)

Fc

31

GHz

Conditions of Stress Receiver Sensitivity Test5

Vertical Eye Closure Penalty5

VECP

1.8

dB

Stressed Eye J2 Jitter

J2

0.3

UI

Stressed Eye J4 Jitter

J4

0.47

UI

Note:

  • Even if the TDP <1dB, the OMA min must exceed the minimum value specified here.
  • See the figure below.
  • The receiver shall be able to tolerate, without damage, continuous exposure to a modulated optical input signal having this power level on one lane. The receiver does not have to operate correctly at this input power.
  • Measured with conformance test signal at receiver input for BER =1×10-12.
  • Vertical eye closure penalty and stressed eye jitter are test conditions for measuring stressed receiver sensitivity. They are not characteristics of the receiver.

Mechanical Dimensions41

Ordering Information

Product Description

Part Number

QSFP28 LR4 Lite, 103.125Gb/s, 1310nm, 4km, SMF, LC,0 ~ +70℃

FTQ2-HG-LR4L

QSFP28 LR4 Lite, 103.125Gb/s, 1310nm, 4km, SMF, LC,-40 ~ +85℃

FTQ2-HG-LR4LI

 

 

 

 

 

 

 

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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.