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100G QSFP28 SR01 BIDI MMF 850nm 100m

Ascent’s QSFP28 100G SR BIDI is a parallel Quad Small Form-factor Pluggable (QSFP28) Bi-Direction optical module which can support 100Gb/s bit rates in an optical communication application compliant to SFF-8636 standards. The module integrates four host electrical data into two optical lanes (by Dual Wavelength VCSEL Bi-Directional Optical Interface, 850nm and 900nm) to allow optical communication over a 2-fiber duplex LC optical multi-mode fiber. Reversely, on the receiver side, the module de-multiplexes 2 sets of optical input signal and converts them to 4 channels of electrical data. An optical fiber ribbon cable with an LC connector can be plugged into the QSFP28 module receptacle. Proper alignment is ensured by the guide pins inside the receptacle. The cable usually cannot be twisted for proper channel to channel alignment. Electrical connection is achieved through an MSA-compliant 38-pin edge type connector. The product is designed with form factor, optical/electrical connection, and digital diagnostic interface according to the QSFP+ Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity, and EMI interference.

·       QSFP28 MSA Specification Compliant, including new functions per SFF-8636

·       100G Link Distances up to 70m over OM3,100m over OM4

·       Hot Pluggable

·       Dual Wavelength VCSEL Bi-Directional Optical Interface, PAM4 2x50Gbps 850nm/908nm

·       Interface with Digital monitoring and maskable Interrupts for Ex-panded functionality

·       Case Operating Temperature:

      Range: 0 to 70°C

·       RoHS II Compliance

·       Operating Mode


Absolute Maximum Ratings

Parameter

Symbol

Min.

Max.

Unit

Notes

Storage Ambient Temperature

Tstg

-40

+85

°C


Relative Humidity - Storage

RHS

0

95

%


Relative Humidity - Operating

RHO

0

85

%


Module Supply Voltage

VCC

-0.5

3.6

V


Notes:
    
1.       Exceeding the Absolute Maximum Ratings may cause irreversible damage to the device. The device is not intended to be operated under the condition of simulta-neous Absolute Maximum Ratings, a condition which may     
            cause irreversible damage to the device. RH is Non-condensing condition.

Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Case Operating Temperature

Tcase

0

+25

+70

°C


Module Supply Voltage

VCC

3.135

3.3

3.465

V


Signaling Speed Per Electrical

Channel(4x25G NRZ)

S

-

25.78

-

Gb/s


Power Consumption

P

-

-

4

W



Electrical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Transmitter







Tx_Data Differential Input

Voltage

VIN

200

-

900

mV


Tx_Data Differential Input

Impedance

ZIN

-

100

-

Ω


Receiver







Rx_Data Differential Output

Voltage

VOUT

-

-

1200

mV


Rx_Data Differential Output

Impedance

ZOUT

-

100

-

Ω


Timing Requirement of Control and Status I/O

Tx Squelch Deassert Time

toff_Txsq

-

-

1

s


Rx Squelch Deassert Time

toff_Rxsq

-

-

2

s


Non-Volatile Memory Specification

Complete Single or Sequential

Write

twr

-

-

80

ms


Soft Control and Status Timing Requirements

Application or Rate Select

Change Time

t_ratesel

-

-

600

ms



100G Transmitter &Receiver Optical Characteristics

Parameter

Transmitter

Symbol

 

Test Point

Min.

 

Typ.

 

Max.

 

Unit

Notes

 

Average Launch Power ,each Lane

POUT

TP2

-6.2

-

4

dBm

Average Optical

Output

Optical modulation Amplitude , each Lane

OMA

TP2

-4.2

-

3

dBm


Extinction Ratio

ER

TP2

3

-

-

dB


Launch power in OMAouter Minus

TDECQ, each Lane

OMA-

TDECQ

TP2

-5.9

-

-

dB


Optical Output with Tx OFF

POFF

TP2

-

-

-30

dBm


Center Wavelength 1

λ

TP2

844

850

863

nm


Center Wavelength 2

λ

TP2

900

908

918

nm


RMS Spectral Width1

Δλ

TP2

-

-

0.6

nm


RMS Spectral Width2

Δλ

TP2

-

-

0.65

nm


Optical Return Loss Tolerance

ORL

TP2

-

-

12

dB


Transmitter and Dispersion Eye Closure for PAM4 (TDECQ), each

Lane

 

TDECQ

 

TP2



 

4.9

 

dB


Receiver








Average Power at Receive Input,

each Lane

PIN

TP3

-7.9

-

4

dBm

Note1

Receive Power, each Lane

(OMAouter)

PIN(OMA)

TP3

-5.9

-

3

dBm


Unstressed Receiver Sensitivity

(OMAouter), each Lane

Sen

TP3

-

-

max(-6.6,

SECQ - 8)

dBm

Note2

Center Wavelength1

λ

TP3

844

850

863

nm


Center Wavelength2

λ

TP3

900

908

918

nm


Receiver Reflectance

RFL

TP3

-

-

-12

dB


Rx_LOS of Signal - Assert

PA

TP3

-30

-

-

dBm


Rx_LOS of Signal - Deassert

PD

TP3

-

-

-5.9

dBm


Rx_LOS of Signal - Hysteresis

PHy

TP3

0.5

-

-

dB


 Notes:
    
1.    A received power below this value cannot be compliant; however, avalue above this does not ensure compliance.        
    2.
       Sensitivity where the BER=2.4E-4 measured with a PRBS 31Q test pattern@26.56GBaud.


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