
Description
F-tone Networks QSFP28 to 4x SFP28 breakout Active Optical Cable offers IT professionals a cost-effective interconnect solution for merging 100G QSFP28 and 25G SFP28 enabled host adapters, switches and servers.
For typical applications, users can install this splitter Active Optical cable between an available QSFP28 port on their 100Gbps rated switch and feed up to four upstream 25GbE-SFP28 enabled switches. Each QSFP28-SFP28 splitter Active Optical cable features a single QSFP28 connector (SFF-8436) rated for 100Gbps on one end and (4) SFP28 connectors (SFF-8431), each rated for 25Gb/s, on the other.
Features
● Electrical interface compliant to SFF-8436 and SFF-8431
● Hot Pluggable
● 850nm VCSEL laser and PIN photo-detector
● Maximum link length of 70m on OM3 MMF and 100m on OM4 MMF
● Internal CDR on both Transmitter and Receiver channel
● Digital diagnostics functions are available via the I2C interface (Optional)
● All-metal housing for superior EMI performance
● RoHS-6 compliant
● Case operating temperature
Commercial: 0 ~ +70℃
Industrial: -40 ~ +85℃
Applications
● 40 Gigabit Ethernet
● 25GBASE-SR Ethernet
● Fibre Channel Applications
● InfiniBand QDR, SDR, DDR
● High-performance computing clusters
● Servers, switches, storage and host card adapters
QSFP28 interface Specifications
| Parameter | Description |
| Module Form Factor | QSFP28 (Supports SFF8436) |
| Data Rate, Each lane | 25.78125Gbps |
| BER | <10-12 |
| Operating Case Temperature | 0 to + 70ºC |
| Storage Temperature | -20 to + 85ºC |
| Supply Voltage | 3.3V |
| Supply Current | Typical 560mA |
| Power Dissipation | <2.5W, Level 2 |
| Management Interface Serial | I2C (Supports SFF8436) |
Optical and Electrical Characteristics
The following optical characteristics are defined over the Recommended Operating Environment unless otherwise specified.
| Parameter | Symbol | Min | Typical | Max | Unit | Notes | |||||
| Transmitter | |||||||||||
| Centre Wavelength | λc | 840 | 850 | 860 | nm | – | |||||
| RMS spectral width | ∆λ | – | – | 0.60 | nm | – | |||||
| Average launch power, each lane | Pout | -8.4 | – | 2.4 | dBm | – | |||||
| Optical Modulation Amplitude(OMA),each lane | OMA | -6.4 | 3 | dBm | – | ||||||
| Transmitter and dispersion eyeclosure(TDEC),each lane | TDEC | 4.3 | dB | ||||||||
| Extinction Ratio | ER | 3 | – | – | dB | – | |||||
| Average launch power of OFFtransmitter, each lane | -30 | dBm | – | ||||||||
| Eye Mask coordinates: X1, X2, X3, Y1, Y2, Y3 | SPECIFICATION VALUES0.3,0.38,0.45,0.35,0.41.0.5 | Hit Ratio = 5×10-5 | |||||||||
| Differential data input swing | VIN,PP | 40 | 1000 | mV | |||||||
| Receiver | |||||||||||
| Centre Wavelength | λc | 840 | 850 | 860 | nm | – | |||||
| Stressed receiver sensitivity in OMA, each lane | -5.2 | dBm | 1 | ||||||||
| Maximum Average power at receiver input, each lane | 2.4 | dBm | – | ||||||||
| Minimum Average power atreceiver , each lane | -10.3 | dBm | |||||||||
| Receiver Reflectance | -12 | dB | – | ||||||||
| LOS Assert | -30 | dBm | – | ||||||||
| LOS Deassert | -7.5 | dBm | – | ||||||||
| LOS Hysteresis | 0.5 | dB | – | ||||||||
| Receive Eye Amplitude | 300 | 800 | mV | ||||||||
| Receive Eye Width | 25 | Ps | |||||||||
| Receive Eye Height | 250 | mV | |||||||||
Note:1.Measured with conformance test signal at TP3 for BER = 10e-12
SFP28 interface Specifications
| Parameter | Description |
| Module Form Factor | SFP28 (Supports SFF8431/SFF8432/SFF8472) |
| Channel Data Rate | 25.78125Gbps |
| BER | <10-12 |
| Operating Case Temperature | 0 to + 70ºC |
| Storage Temperature | -20 to + 85ºC |
| Supply Voltage | 3.3V |
| Supply current | Typical 180mA |
| Power Dissipation | <1W,Level I |
| Management Interface Serial | I2C (Supports SFF8472) |
Optical and Electrical Characteristics
The following optical characteristics are defined over the Recommended Operating Environment unless otherwise specified.
| Parameter | Symbol | Min. | Typical | Max | Unit | Notes |
| Transmitter | ||||||
| Center Wavelength | λt | 840 | 850 | 860 | nm | |
| RMS spectral width | Pm | – | – | 0.6 | nm | |
| Average Optical Power | Pavg | -8.4 | – | 2.4 | dBm | |
| Optical Power OMA | POMA | -6.4 | 3 | dBm | ||
| Transmitter and dispersion eyeclosure(TDEC),each lane | TDEC | 4.3 | dB | |||
| Extinction Ratio | ER | 2 | – | – | dB | 3 |
| Eye Mask coordinates:X1, X2, X3, Y1, Y2, Y3 | SPECIFICATION VALUES0.3,0.38,0.45,0.35,0.41.0.5 | Hit Ratio = 5×10-5 | ||||
| Differential data input swing | VIN,PP | 40 | 1000 | mV | ||
| Receiver | ||||||
| Center Wavelength | λr | 840 | 850 | 860 | nm | |
| Stressed receiver sensitivity in OMA, each lane | -5.2 | dBm | ||||
| Maximum Average power at receiver input, each lane | 2.4 | dBm | ||||
| Minimum Average power atreceiver , each lane | -10.3 | dBm | ||||
| Receiver Reflectance | – | – | -12 | dB | ||
| LOS De-Assert | LOSD | -7.5 | dBm | |||
| LOS Assert | LOSA | -30 | dBm | |||
| LOS Hysteresis | 0.5 | dB | ||||
| Receive Eye Amplitude | 500 | 1300 | mV | |||
| Receive Eye Width | 25 | Ps | ||||
| Receive Eye Height | 250 | mV | ||||
Note:1.Measured with conformance test signal at TP3 for BER = 10e-12
Mechanical Dimensions

Ordering information
| Part Number | Product Description |
| FTQ2-HG-4CS-Oxxx | 100G QSFP28 to 4x 25G SFP28 Active Optical Cable,0ºC ~ +70ºC |
| FTQ2-HG-4CS-OxxxI | 100G QSFP28 to 4x 25G SFP28 Active Optical Cable,-40ºC ~ +85ºC |
| xxx :001~100,1~100 Length in meters. (OM4fiber is available) | |
| Further details are available from any F-tone Networks sales representative. | |
北亿纤通 | F-tone Networks
企业邮箱: sales@f-tone.com
企业手机:19081343401
企业电话:028-85255257
企业传真:028-85977702
注:本产品有全国产化型号可选
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.

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光学性能测试
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