Description
The F-tone Networks 100G QSFP28 SR4 (FTQ2-HG-SR4-M2-xxx) is designed for use in 100-Gigabit Ethernet links up to 100m over Multi-Mode Fiber (MMF) especially for liquid immersion environment. It is compliant with the QSFP28 MSA and IEEE 802.3bm 100GBASE-SR4 and CAUI-4. Digital diagnostics functions are available via the I2C interface, as specified by the QSFP28 MSA. It integrates 4 data lanes in each direction with 4×25.78125Gb/s bandwidth. The electrical interface uses a 38-contact edge type connector. The optical interface uses a single male MPO-12 pigtail. This module incorporates F-tone Networks proven circuit and VCSEL technology to provide reliable long life, high performance, and consistent service.

Features
● Hot-pluggable QSFP28 form factor
● 4 channels full-duplex transceiver module
● Supports 103.125Gb/s aggregate bit rate
● 4 channels 850nm VCSEL array
● 4 channels PIN photo-detector array
● Internal CDR circuits on both receiver and transmitter channels
● Supports CDR bypass
● 2W maximum power dissipation
● Maximum link length of 70m on OM3 MMF and 100m on OM4 MMF
● Single male MPO-12 pigtail
● Single 3.3V power supply
● RoHS compliant (lead free)
● Case operating temperature
     Commercial: 0 ~ +60℃
     Industrial: -40 ~ +85℃

Applications
● 100GBASE-SR4 100G Ethernet
● Especially design for liquid immersion environment

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

60

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

Tc

0

60

ºC

Data Rate Per Lane

fd

25.78125

Gb/s

Humidity

Rh

5

85

%

Power Dissipation

Pm

2

W

Fiber Bend Radius

Rb

3

cm

Liquid immersion depth

10

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

300

1100

mVp-p

Differential Output Voltage Amplitude2

ΔVout

500

800

mVp-p

Skew

Sw

300

ps

Bit Error Rate

BER

5×10-5

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: 

  • 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

Transmitter

Center 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 (each lane)

OMA

-6.4

3

dBm

Transmitter and Dispersion Eye Closure (each lane)

TDEC

4.3

dB

Extinction Ratio

ER

3

dB

Average Launch Power of OFF Transmitter (each lane)

Poff

-30

dB

Eye Mask Coordinates1: X1, X2, X3, Y1, Y2, Y3

{0.3, 0.38, 0.45, 0.35, 0.41, 0.5}

Receiver

Center Wavelength

λc

840

850

860

nm

Stressed Receiver Sensitivity in OMA2

-5.2

dBm

Average Power at Receiver

Input (each lane)

-10.3

2.4

dBm

Receiver Reflectance

RR

-12

dB

LOS Assert

LOSA

-30

dBm

LOS De-Assert – OMA

LOSD

-7.5

dBm

LOS Hysteresis

LOSH

0.5

dB

Note:

  • Hit Ratio = 5×10-5
  • Measured with conformance test signal at TP3 for BER=10-5

Mechanical Dimensions73

Ordering Information

Part Number

Product Description

FTQ2-HG-SR4-M2-xxx

QSFP28 SR4, 103.125Gb/s, male MTP pigtail ,liquid immersion,0ºC ~ +60ºC

FTQ2-HG-SR4-M2-xxxI

QSFP28 SR4, 103.125Gb/s, male MTP pigtail ,liquid immersion,-40ºC ~ +85ºC