
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 ReceiverInput (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 Dimensions

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 |
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.

光学性能测试
测试光纤收发模块的眼图情况、接收灵敏度、消光比、波长、发光、光接收、电流和电压,以确保信号质量、传输的稳定性和可靠性。
Traffic Testing
测试误码率和丢包率,使其符合相应标准,确保收发器的性能。


光学性能测试
测试光纤收发模块的眼图情况、接收灵敏度、消光比、波长、发光、光接收、电流和电压,以确保信号质量、传输的稳定性和可靠性。
端面测试
检查光纤收发模块的端面并保持清洁,以实现更稳定的数据传输、更好的性能和耐用性。


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