
Description
The F-tone Networks Technologies FTCS-50G-CS-Oxxx is a single-Channel Active Optical Cable for 26.5625GBd PAM4 Ethernet Applications. It is a high performance module for short-range data communication and interconnect applications which operate at 53.125Gbps up to 70 m using OM3 fiber or 100 m using OM4 fiber. This module is designed to operate over multimode fiber systems using a nominal wavelength of 850nm. The electrical interface uses a 20 contact edge type connector. This module incorporates F-tone Networks Technologies proven circuit and VCSEL technology to provide reliable long life, high performance, and consistent service.
Features
● full-duplex transceiver modules
● Transmission data rate up to 53Gbps per channel
● 53Gbps PAM4 transmitter and PAM4 receiver
● 850nm VCSEL array
● PIN photo detector array
● Internal CDR circuits on both receiver and transmitter channels
● Power consumption <2W
● Hot Pluggable SFP form factor and Compliant with SFF-8431,SFF-8472
● Maximum link length of 70m on OM3 Multimode Fiber (MMF)and 100m on OM4 MMF with FEC
● 3.3V power supply voltage
● RoHS 6 compliant(lead free)
● Case operating temperature
     Commercial: 0 ~ +70℃
     Industrial: -40 ~ +85℃
Applications
● IEEE 802.3cd 50GBASE-SR
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 | Tst | -20 | 85 | ºC | 
| Case Operating Temperature | Top | 0 | 70 | 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 | Tca | 0 | 70 | ºC | |
| Data Rate Per Lane | fd | 26.5625 | GBd | ||
| Humidity | Rh | 5 | 85 | % | |
| Power Dissipation | Pm | 2 | W | 
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 amplitude aAmplitude | ΔVin | 900 | mVp-p | ||
| Differential output voltage amplitude | ΔVout | 900 | mVp-p | ||
| Skew | Sw | 300 | ps | ||
| Bit Error Rate | BER | 2.4E-4 | – | ||
| Near-end Eye Width at 10^-6 probability(EW6) | 0.265 | UI | |||
| Near-end Eye Height at 10^-6 probability(EH6) | 70 | mV | |||
| Far-end Eye Width at 10^-6 probability(EW6) | 0.20 | UI | |||
| Far-end Eye Height at 10^-6 probability(EH6) | 30 | mV | |||
| Near-end Eye Linearity | 0.85 | – | 
Note:
1.  BER=2.4E-4; PRBS31Q@26.5625GBd. Pre-FEC
2.  Differential input voltage amplitude is measured between TxnP and TxnN.
3.  Differential output voltage amplitude is measured between RxnP and RxnN.
Optical Characteristics 
Table 3 – Optical Characteristics
| Parameter | Symbol | Min | Typical | Max | Unit | Notes | 
| Transmitter | ||||||
| Centre Wavelength | λc | 840 | 850 | 860 | nm | – | 
| RMS spectral width | ∆λ | – | – | 0.6 | nm | – | 
| Average launch power, each lane | Pout | -6 | – | 4 | dBm | – | 
| Optical Modulation Amplitude(OMAouter), each lane | OMA | -4 | 3 | dBm | – | |
| Transmitter and dispersion eye closure(TDEC) | TDEC | 4.9 | dB | |||
| Extinction Ratio | ER | 3 | – | – | dB | – | 
| Average launch power of OFF transmitter | -30 | dB | – | |||
| Receiver | ||||||
| Centre Wavelength | λc | 840 | 850 | 860 | nm | – | 
| Receiver Sensitivity in OMAout | RXsen | -6.5 | dBm | 1 | ||
| Stressed Receiver Sensitivity in OMAout | -3.4 | dBm | 1 | |||
| Maximum Average power at receiver , each laneinput, each lane | 4 | dBm | – | |||
| Minimum Average power at receiver , each lane | -7.9 | dBm | ||||
| Receiver Reflectance | -12 | dB | – | |||
| LOS Assert | -10.5 | dBm | – | |||
| LOS De-Assert – OMA | -10 | dBm | – | |||
| LOS Hysteresis | 0.5 | dB | – | |||
Note:Measured with conformance test signal at TP3 for BER = 2.4E-4 Per-FEC
Mechanical Dimensions

Ordering information
| Part Number | Product Description | |
| FTCS-50G-CS-Oxxx | 53.125Gbps, 850nm; SFP56 Active Optical Cable; 0ºC ~ +70ºC | |
| FTCS-50G-CS-OxxxI | 53.125Gbps, 850nm; SFP56 Active Optical Cable; -40ºC ~ +85ºC | |
| xxx :001~070,1~70 Length in meters on OM3 MMF | ||
| xxx :001~100,1~100 Length in meters on OM4 MMF | ||
| 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.ks sales representative.ata 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.e Networks sales representative.tive.s or others. Further details are available from any F-tone Networks sales representative.y 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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