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100G QSFP28 SR4 850 nm 100m

Ascent’s QSFP-28-100G-LP-01 is a 100 Gb/s transceiver module designed for optical communication applications compliant to 100GBASE-SR4 and IEE 802.3bm standards.

    Hot pluggable QSFP28 MSA form factor

    Compliant to Ethernet 100GBASE-SR4

    Supports 103.1 Gb/s aggregate bit rate

    Up to 100 m reach with OM4 multimode fiber

    Up to 70 m reach with OM3 multimode fiber

    Single +3.3V power supply

    Operating case temperature: 0 °C to 70 °C

    <2.0 W power dissipation

    High reliability 850 nm VCSEL technology

    Standard 12 lane with MPO connector

    Compliant with SFF-8636

    RoHS compliant


Absolute Maximum Ratings

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Storage Temperature

Ts

‑40

85

°C


Relative Humidity

RH

5

95

%


Power Supply Voltage

VCC

‑0.3

4

V


Signal Input Voltage


Vcc‑0.3

Vcc+0.3

V



Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Case Operating Temperature

Tcase

0

70

°C

Without air flow

Power Supply Voltage

VCC

3.14

3.3

3.46

V


Power Supply Current

ICC


600

mA


Data Rate

BR


25.78125


Gbps

Each channel

Transmission Distance

TD


100

m

OM4


TD


70

m

OM3

Note:

100G Ethernet &100GBASE‑SR4 and ITU‑T OTU4 has different register setting, not auto‑negotiation


Optical Characteristics 

Parameter

Symbol

Min

Typ

Max

Unit

Notes

Transmitter







Center Wavelength

λ0

840


860

nm


Average Launch Power each lane


‑8.4


2.4

dBm


Spectral Width (RMS)

σ



0.6

nm


Optical Extinction Ratio

ER

2



dB


Optical Return Loss Tolerance 

ORL 



12 

dB


Output Eye Mask

Compliant with IEEE 802.3bm

1

Receiver







Receiver Wavelength 

λin

840


860

nm


Rx Sensitivity per lane

RSENS



‑10.3

dBm

2

LOS De‑Assert 

LOSD 

‑30



dBm


LOS Assert 

LOSA 



‑12

dBm


Input Saturation Power (Overload)

Psat

2.4



dBm


Receiver Reflectance 

Rr



‑12

dB


Notes: 

1. Hit ratio 1.5*10‑5 hits per sample

2. Measured with a PRBS 231‑1 test pattern, @ 25.78 Gb/s, BER<5.0*10‑5


Electrical Characteristics 

Parameter

Symbol

Min

Typ

Max

Unit

Notes

Supply Voltage

Vcc

3.14

3.3

3.46

V


Supply Current

Icc



600

mA


Transmitter







Input Differential Impedance

Rin


100


Ω

1

 Differential Data Input Swing

Vin, pp

180


1000

mV


Single Ended Input Voltage Tolerance 

VinT 

‑0.3 


4.0 

V


Receiver







Differential Data Output Swing

Vout, pp

300


850

mV

2

Single‑Ended Output Voltage 


‑0.3 


4.0 

V


Notes: 

1. Connected directly to TX data input pins. AC coupled thereafter. 

2. Into 100 Ω differential termination. 


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