Ascent’s QSFP-DD-DR4-A05 400Gb/s Quad Small Form Factor Pluggable-double density (QSFP- DD) optical module designed for 500m optical communication applications. The module converts 8 channels of 50Gb/s (PAM4) electrical input data to 4 channels of parallel optical signals, each capable of 100Gb/s operation for an aggregate data rate of 400Gb/s. Reversely, on the receiver side, the module converts 4 channels of parallel optical signals of 100Gb/s each channel for an aggregate data rate of 400Gb/s into 8 channels of 50Gb/s (PAM4) electrical output data. An optical fiber cable with an MTP/MPO-12 connector can be plugged into the QSFP- DD DR4 module receptacle. Proper alignment is ensured by the guide pins inside the receptacle. The cable usually cannot be twisted for proper channel to channel alignment. Electrical connection is achieved through an QSFP-DD MSA-compliant edge type connector. The product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP-DD Multi-Source Agreement (MSA) Type. It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference.
· QSFP-DD MSA compliant
· Parallel 4 Optical Lanes
· IEEE802.3bs Specification compliant
· Up to 500m transmission on single mode fiber (SMF) with FEC
· Operating case temperature: 0 to 70°C
· 8x53.125Gb/s electrical interface (400GAUI-8)
· Data Rate 106.25Gbps (PAM4) per channel
· Maximum power consumption 12W
· MPO-12 connector
· RoHS compliant
It has to be noted that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module.
Parameter | Symbol | Min. | Max. | Unit | Note |
Storage Temperature | TS | -40 | 85 | °C | |
Operating Case Temperature | TOP | 0 | 70 | °C | |
Power Supply Voltage | VCC | -0.5 | 3.6 | V | |
Relative Humidity (non-condensation) | RH | 0 | 85 | % |
Recommended Operating Conditions
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Operating Case Temperature | TOP | 0 | 70 | °C | ||
Power Supply Voltage | VCC | 3.135 | 3.3 | 3.465 | V | |
Data Rate, each Lane | 26.5625 | GBd | PAM4 | |||
Data Rate Accuracy | -100 | 100 | ppm | |||
Pre-FEC Bit Error Ratio | 2.4x10-4 | |||||
Post-FEC Bit Error Ratio | 1x10-13 | 1 | ||||
Link Distance | D | 0.5 | 500 | km | 2 |
Notes:
1. FEC provided by host system.
2. FEC required on host system to support maximum transmission distance.
The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified.
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Power Consumption | 12 | W | ||||
Supply Current | Icc | 3.64 | A | |||
Transmitter (each Lane) | ||||||
Signaling Rate, each Lane | TP1 | 26.5625 ± 100 ppm | GBd | |||
Differential pk-pk Input Voltage Tolerance | TP1a | 900 | mVpp | 1 | ||
Differential Termination Mismatch | TP1 | 10 | % | |||
Differential Input Return Loss | TP1 | IEEE 802.3-2015 Equation (83E-5) | dB | |||
Differential to Common Mode Input Return Loss | TP1 | IEEE 802.3-2015 Equation (83E-6) | dB | |||
Module Stressed Input Test | TP1a | See IEEE 802.3bs 120E.3.4.1 | 2 | |||
Single-ended Voltage Tolerance Range (Min) | TP1a | -0.4 to 3.3 | V | |||
DC Common Mode Input Voltage | TP1 | -350 | 2850 | mV | 3 | |
Receiver (each Lane) | ||||||
Signaling Rate, each lane | TP4 | 26.5625 ± 100 ppm | GBd | |||
Differential Peak-to-Peak Output Voltage | TP4 | 900 | mVpp | |||
AC Common Mode Output Voltage, RMS | TP4 | 17.5 | mV | |||
Differential Termination Mismatch | TP4 | 10 | % | |||
Differential Output Return Loss | TP4 | IEEE 802.3- 2015 Equation (83E-2) | ||||
Common to Differential Mode Conversion Return Loss | TP4 | IEEE 802.3- 2015 Equation (83E-3) | ||||
Transition Time, 20% to 80% | TP4 | 9.5 | ps | |||
Near-end Eye Symmetry Mask Width (ESMW) | TP4 | 0.265 | UI | |||
Near-end Eye Height, Differential | TP4 | 70 | mV | |||
Far-end Eye Symmetry Mask Width (ESMW) | TP4 | 0.2 | UI | |||
Far-end Eye Height, Differential | TP4 | 30 | mV | |||
Far-end Pre-cursor ISI Ratio | TP4 | -4.5 | 2.5 | % | ||
Common Mode Output Voltage (Vcm) | TP4 | -350 | 2850 | mV | 3 |
Notes:
1. With the exception to IEEE 802.3bs 120E.3.1.2 that the pattern is PRBS31Q or scrambled idle.
2. Meets BER specified in IEEE 802.3bs 120E.1.1.
3. DC common mode voltage generated by the host. Specification includes effects of ground offset voltage.
Optical Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Center Wavelength | λc | 1304.5 | 1310 | 1317.5 | nm | |
Transmitter | ||||||
Data Rate, each Lane | 53.125 ± 100 ppm | GBd | ||||
Modulation Format | PAM4 | |||||
Side-mode Suppression Ratio | SMSR | 30 | 1295.56 | dB | Modulated | |
Average Launch Power, each Lane | PAVG | -2.9 | 1300.05 | 4 | dBm | 1 |
Outer Optical Modulation Amplitude (OMAouter), each Lane | POMA | -0.8 | 1304.58 | 4.2 | dBm | 2 |
Launch Power in OMAouter minus TDECQ, each Lane | -2.2 | 1309.14 | dB | |||
Transmitter and Dispersion Eye Closure for PAM4, each Lane | TDECQ | 3.4 | dB | |||
Extinction Ratio | ER | 3.5 | dB | |||
RIN21.4OMA | RIN | -136 | dB/Hz | |||
Optical Return Loss Tolerance | TOL | 21.4 | dB | |||
Transmitter Reflectance | TR | -26 | dB | |||
Average Launch Power of OFF Transmitter, each Lane | Poff | -15 | dBm | |||
Receiver | ||||||
Data Rate, each Lane | 53.125 ± 100 ppm | GBd | ||||
Modulation Format | PAM4 | |||||
Damage Threshold, each Lane | THd | 5 | dBm | 3 | ||
Average Receive Power, each Lane | -5.9 | 4 | dBm | 4 | ||
Receive Power (OMAouter), each Lane | 4.2 | dBm | ||||
Receiver Sensitivity (OMAouter), each Lane | SEN | -4.4 | dBm | 5 | ||
Stressed Receiver Sensitivity (OMAouter), each Lane | SRS | -1.9 | dBm | 6 | ||
Receiver Reflectance | RR | -26 | dB | |||
LOS Assert | LOSA | -30 | dBm | |||
LOS De-assert | LOSD | -12 | dBm | |||
LOS Hysteresis | LOSH | 0.5 | dB | |||
Stressed Conditions for Stress Receiver Sensitivity (Note 7) | ||||||
Stressed Eye Closure for PAM4 (SECQ), Lane under Test | 3.4 | dB | ||||
OMAouter of each Aggressor Lane | 4.2 | dBm |
1. Average launch power, each lane (min) is informative and not the principal indicator of signal strength. A transmitter with launch power below this value cannot be compliant; however, a value above this does not ensure compliance.
2. Even if the TDECQ < 1.4 dB, the OMAouter (min) must exceed the minimum value specified here.
3. The receiver shall be able to tolerate, without damage, continuous exposure to an optical input signal having this average power level.
4. Average receive power, each lane (min) is informative and not the principal indicator of signal strength. A received power below this value cannot be compliant; however, a value above this does not ensure compliance.
5. Receiver sensitivity (OMAouter), each lane (max) is informative and is defined for a transmitter with SECQ of 0.9 dB.
6. Measured with conformance test signal for BER = 2.4x10-4.
7. These test conditions are for measuring stressed receiver sensitivity. They are not characteristics of the receiver.
Digital Diagnostic Functions
Parameter | Symbol | Min. | Max. | Unit | Note |
Temperature Monitor Absolute Error | DMI_Temp | -3 | 3 | °C | Over operating temperature range |
Supply Voltage Monitor Absolute Error | DMI _VCC | -0.1 | 0.1 | V | Over full operating range |
Channel RX Power Monitor Absolute Error | DMI_RX_Ch | -2 | 2 | dB | 1 |
Channel Bias Current Monitor | DMI_Ibias_Ch | -10% | 10% | mA | |
Channel TX Power Monitor Absolute Error | DMI_TX_Ch | -2 | 2 | dB | 1 |
Notes:
1. Due to measurement accuracy of different single mode fibers, there could be an additional +/-1 dB fluctuation, or a +/- 3 dB total accuracy.
ESD
This transceiver is specified as ESD threshold 1kV for high-speed data pins and 2kV for all other electrical input pins, tested per MIL-STD-883, Method 3015.4 /JESD22-A114-A (HBM).
However, normal ESD precautions are still required during the handling of this module. This transceiver is shipped in ESD protective packaging. It should be removed from the packaging and handled only in an ESD-protected environment.
Laser Safety
This is a Class 1 Laser Product according to EN 60825-1:2014. This product complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated (June 24, 2007).
Caution: Use of controls, adjustments, or performance of procedures other than those specified herein may result in hazardous radiation exposure.
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