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100G QSFP28 SWDM4 Optical Transceiver

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Feature Compliant with QSFP28 MSACompliant with SWDM MSACompliant with IEEE802.3bm CAUI-4Hot-pluggable QSFP28 form factor4x25Gb/s 850mm VCSEL-based transmitterSupports 103.1Gbps......

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100G QSFP28 SWDM4 Optical Transceiver


100G QSFP28 SWDM4


Description


The 100G QSFP28 SWDM4 transceiver modules are designed for use in 100G Ethernet links over duplex multi mode fiber. Four channels/lanes in the 850-940nm region @ 25.78Gbps to transport the Ethernet signal. Digital diagnostics functions are available via an I2C interface, as specified by the QSFP28 MSA.



1. Absolute Maximum Ratings


Parameter
 Symbol
 Min
 Max
 Units
Storage Temp Range
 Ts
 -40
 +85
 ℃
Supply Voltage
 Vcc
 -0.5
 3.6
 V
Relative Humidity
 RH
 15%
 85%



2. Operating Conditions


Parameter
 Symbol
 Min
 Max
 Units
Case Temp-Operating
 Tcase
 0
 70 ℃
Supply Voltage
 Vcc
 3.14 3.46 V
Power Consumption
 P
3.5 W
Link Distance on OM3 Fiber

75 M
Link Distance on OM4 Fiber

100 M
Link Distance on OM5 Fiber

150 M



3. Optical Characteristics


Transmitter Parameter

Lane

Min

Typical

Max

Unit

Note

Signaling rate, each lane

 

25.78125±100ppm

Gb/s

 

 

Lane Wavelength Range

Lane0

Lane1

Lane2 

Lane3

844

874

904

934

 

858

888

918

948

 

nm

 

Modulation Format

 

NRZ

 

 

Difference in launch power between any two lanes

 

 

 

4.5

dBm

 

RMS Spectral width

 

 

 

0.59

nm

1

Optical Modulation Amplitude (OMA), each lane

 

-5.5

 

3

dBm

2

Average Launch Power per Lane @ TX Off State

 

 

 

-30

dBm

 

 

Launch Power in OMA minus TDEC

Lane0 

Lane1 

Lane2 

Lane3

-7

-7

-7.4

-7.7

 

 

 

dBm

 

 

Transmitter and Dispersion Eye Closure

Lane0 

Lane1 

Lane2 

Lane3

 

 

4

4   

4.4

4.8

 

dB

 

3

Extinction Ratio

 

2

 

 

dB

 

Optical Return Loss Tolerance

 

 

 

12

dB

 

Encircled Flux

 

≥86% at 19 um ≤30% at 4.5 um

4

Transmitter eye mask definition {X1,X2, X3, Y1, Y2, Y3}

Hit ratio 1.5x10-3 hits per sample

 

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

 

Notes:

1. RMS spectral width is the standard deviation of the spectrum.

2. The normative lowest value of OMA for a compliant transmitter is ‘ Launch power in OMA minus TDEC, each lane (min)’ plus the actual value of ‘TDEC’, but with a value of at least ‘OMA, each lane (min)’ .

3. TDEC is calculated from the measured TDECm using the methods in 3.6.  TDECm is measured following the method in IEEE 802.3

clause 95.8.5 using a 12.6 GHz bandwidth reference receiver for all lanes.

4. If measured into type A1a.2 or type A1a.3 50 um fiber in accordance with IEC 61280-1-4.

 

Receiver Parameter

Lane

Min

Typical

Max

Unit

Note

Signaling rate, each lane

 

25.78125±100ppm

Gb/s

 

 

Lane Wavelength Range

Lane0

Lane1 

Lane2 

Lane3

844

874

904

934

 

858

888

918

948

 

nm

 

Modulation Format

 

NRZ

 

 

Damage Threshold

 

4.4

 

 

dBm

 

 

Average Receive Power, each lane

Lane0 

Lane1 

Lane2 

Lane3

-9.5

-9.4

-9.4

-9.4

 

 

3.4

 

dBm

 

Receiver Power, each lane (OMA)

 

 

 

3

dBm

 

Receiver Reflectance

 

 

 

-12

dB

 

 

unStressed Receiver Sensitivity(OMA)

Lane0 

Lane1 

Lane2 

Lane3

 

 

-8.2

-8.4

-8.6

-8.8

 

dBm

 

1

RX_Los_Assert

 

-30

 

 

dBm

 

RX_Los_De-ASSERT

 

 

 

-12

dBm

 

RX_Los_Hysteresis

 

0.5

 

 

dBm

 

1.unstressed sensitivity at BER of 5E-5(pre FEC)



4. Digital Diagnostic Monitoring Specifications

 

Parameters

Unit

Specification

Temperature Monitor

          ℃

± 3

Voltage Monitor

V

± 5 %

I_bias Monitor

mA

± 10 %

Received Power (Rx) Monitor

dB

± 3.0

Transmit Power (Tx) Monitor

dB

± 3.0



5. Electrical Characteristics


Transmitter electrical input signal characteristics(TP1)

Min

Typical

Max

Unit

Signaling rate per lane (range)

25.78125 ± 100 ppm

GBd

Differential input return loss

Equation (83E–5)

 

 

dB

Differential to common mode input return loss

Equation (83E–6)

 

 

dB

Differential termination mismatch

 

 

10

%

Module stressed input test

See 83E3.4.1

 

 

 

Differential pk-pk input voltage tolerance

900

 

 

mV

DC common mode voltage

-350

 

2850

mV

Single ended voltage tolerance range

-0.4

 

3.3

V

Receiver electrical output signal characteristics(TP4)

Min

Typical

Max

Unit

Signaling rate per lane (range)

25.78125 ± 100 ppm

GBd

AC common-mode output voltage (RMS)

 

 

17.5

mV

Differential output voltage

 

 

900

mV

Eye width

0.57

 

 

UI

Eye height, differential

228

 

 

mV

Vertical eye closure

 

 

5.5

dB

Differential output return loss

Equation (83E–2)

 

 

dB

Common to differential mode conversion return loss

Equation (83E–3)

 

 

dB

Differential termination mismatch

 

 

10

%

Transition time (20% to 80%)

12

 

 

ps

DC common mode voltage

-350

 

2850

mV







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