100G QSFP28 to 2x 50G QSFP28 AOC
Description
FIBERWDM’s QSFP28 to 2 x QSFP28 breakout Active Optical Cable is a Four-Channel, Parallel, Fiber-Optic QSFP28 SR4 for 100 or 40 Gigabit Ethernet, InfiniBａnd FDR/EDR and 32GFC Applications. This transceiver is a high-performance module for short-range multi-lane data communication and interconnect applications. It integrates four data lanes in each direction with 112.2 Gbps bandwidth. Each lane can operate at 28.05Gbps up to 70 m using OM3 fiber or 100 m using OM4 fiber. These modules are designed to operate over multimode fiber systems using a nominal wavelength of 850nm. The electrical interface uses a 38contact edge type connector. The optical interface uses an 12 fiber MTP (MPO) connector. This module incorporates Color-chip Technologies proven circuit and VCSEL technology to provide reliable long life, high performance, and consistent service.
Figure1. 100G BASE-SR4 Module Block Diagram
QSFP28 to 2x QSFP28 Active Optical Cable Block Diagram
QSFP28 to 2x QSFP28 breakout Active Optical Cable is one kind of parallel transceiver. VCSEL and PIN array package is key technique, through I2C system can contact with module.
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 |
| SupplyVoltage | Vcc | 3. 13 | 3.3 | 3.47 | V |
| Operating Case temperature | Tca | 0 | | 70 | ºC |
| Data Rate Per Lane | fd | | 25.78125 | 28.05 | Gbps |
| Humidity | Rh | 5 | | 85 | % |
| Power Dissipation QSFP28 end | Pm | | 2 | 2.5 | W |
| Power Dissipation Fanout QSFP28 end | | | 1.3 | 1.6 | W |
| Fiber Bend Radius | Pb | 3 | | | cm |
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 | ΔVin | 300 | | 1100 | mVp-p |
| Differential output voltage amplitude | ΔVout | 500 | | 800 | mVp-p |
| Skew | Sw | | | 300 | ps |
| 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：
1. Differential input voltage amplitude is measured between TxnP and TxnN .
2. 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 | -8.4 | - | 2.4 | dBm | - |
| Optical Modulation amplitude(OMA),each lane | OMA | -6.4 | | 3 | dBm | - |
| Transmitter and dispersion eye closure(TDEC),each lane | TDEC | | | 4.3 | dB | |
| Extinction Ratio | ER | 3 | - | - | dB | - |
| Average launch power of OFF transmitter, each lane | | | | -30 | dB | - |
| Eye Mask coordinates: X1,X2,X3,Y1,Y2,Y3 | SPECIFICATIONVALUES {0.3,0.38,0.45,0.35,0.41.0.5} | HitRatio= 5x10-5 | ||||
| Receiver | ||||||
| Centre Wavelength | λc | 840 | 850 | 860 | nm | - |
| Stressed receiver sensitivity in OMA | | | | -5.2 | dBm | 1 |
| Maximum Average power at receiver, each lane | | | | 2.4 | dBm | - |
| Minimium Atveragel power at receiver , each lane | | | | -10.3 | dBm | |
| Receiver Reflectance | | | | -12 | dB | - |
| LOS Assert | | -30 | | | dBm | - |
| LOS De-Assert–OMA | | | | -7.5 | dBm | - |
| LOS Hysteresis | | 0.5 | | | dB | - |
Note：
1 .Measured with conformance test signal at TP3 for BER = 1e-5
Mechanical Dimensions
Ordering information
| Part Number | Product Description |
| QSFP28-2x50G-AOCXXM | QSFP28 to 2 x QSFP28, 100GBASE-SR4, Active Optical Cable Active Optical Cable 70m on OM3 Multimode Fiber (MMF)ａnd 100m onOM4 Low power Version |
References
1. SFF-8436 QSFP+
2. Ethernet 100GBASE-SR4
