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FR4 QSFP-DD Juniper Compatible Transceiver 400Gbps CWDM4 2km LC
QSFP-DD FR4 S-QD4AC4L2K-CD-4 230301.pdf
Ordering information
| Part Number | Product Description |
| S-QD4AC4L2K-CD-4 | QSFP-DD 400G CWDM4 FR4 2KM LC, 0ºC~+70ºC, With DDM |
Description
Springtek 400Gb/s QSFP-DD FR4 optical module designed for 2km optical communication applications. S-QD4AC4L2K-CD-4 module converts 8 channels of 50Gb/s (PAM4) electrical input data to 4 channels of CWDM optical signals, and multiplexes them into a single channel for 400Gb/s optical transmission.Reversely, on the receiver side, the module optically de-multiplexes a 400Gb/s optical input into 4 channels of CWDM optical signals, and converts them to 8 channels of 50Gb/s (PAM4) electrical output data.
The central wavelengths of the 4 CWDM channels are 1271, 1291, 1311 and 1331 nm as members of the CWDM wavelength grid defined in ITU-T G.694.2.It contains a duplex LC connector for the optical interface and a 76-pin connector for the electrical interface.To minimize the optical dispersion in the long-haul system, single-mode fiber (SMF) has to be applied in this module.Host FEC is required to support up to 10km fiber transmission
S-QD4AC4L2K-CD-4 product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP-DD Multi-Source Agreement (MSA) Type 2.It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference.
Features
Applications
Absolute Maximum Ratings
It hasto be noted that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module.
| Parameter | Symbol | Min | Typ | Max | Unit |
| Power Supply Voltage | Vcc | -0.5 | 3.6 | V | |
| Storage Temperature Range | Ts | -40 | 85 | °C | |
| Operating Case Temperature | To | 0 | 70 | °C | |
| Relative Humidity (non-condensation) | RH | 0 | 85 | % |
Recommended Operating Conditions and Power Supply Requirements
| Parameter | Symbol | Min | Typical | Max | Units | Notes |
| Operating Case Temperature | TOP | 0 | 70 | degC | ||
| 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 | 1x10-12 | 1 | ||||
| Link Distance | D | 0.002 | 2 | km | 2 | |
| Notes: 1. FEC provided by host system. 2. FEC required on host system to support maximum distance | ||||||
Electrical Characteristics
The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified.
| Parameter | Test oint | Min | Typical | Max | Units | Notes | |
| 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 Mismatch | TP1a | 900 | mVpp | 1 | |||
| Differential Termination | 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 | ||||
| Near-end Eye Height, Differential | TP1 | -350 | 2850 | mV | 3 | ||
| Receiver (each Lane) | |||||||
| Far-end Eye Height, Differential | TP4 | 26.5625 ± 100 ppm | GBd | ||||
| Differential Peak-to-Peak Output Voltage | TP4 | 900 | mVpp | ||||
| AC Common Mode Output Voltage (Vcm) | 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 | Typical | Max | Units | Notes |
| Transmitter | ||||||
| Center Wavelength | L0 | 1264.5 | 1271 | 1277.5 | nm | |
| L1 | 1284.5 | 1291 | 1279.5 | nm | ||
| L2 | 1304.5 | 1311 | 1317.5 | nm | ||
| L3 | 1324.5 | 1331 | 1337.5 | nm | ||
| Data Rate, each Lane | 53.125 ± 100 ppm | GBd | ||||
| Modulation Format | PAM4 | |||||
| Side-mode Suppression Ratio | SMSR | 30 | dB | |||
| Total Average Launch Power | PT | 9.3 | dBm | |||
| Average Launch Power, each Lane | PAVG | -3.3 | 3.5 | dBm | 1 | |
| Outer Optical Modulation Amplitude (OMAouter),each Lane | POMA | -0.3 | 3.7 | dBm | 2 | |
| Launch Power in OMAouter minus TDECQ, each Lane for ER ≥ 4.5dB for ER < 4.5dB |
-1.7 -1.6 | dB | ||||
| Transmitter and Dispersion Eye Clouser for PAM4, each Lane | TDECQ | 3.4 | dB | |||
| TDECQ – 10*log10(Ceq), each Lane | 3.4 | dB | 3 | |||
| Extinction Ratio | ER | 3.5 | dB | |||
| Difference in Launch Power between any Two Lanes(OMAouter) | 4 | dB | ||||
| RIN15.6OMA | RIN | -136 | dB/Hz | |||
| Optical Return Loss Tolerance | TOL | 17.1 | dB | |||
| Average Launch Power of OFF Transmitter, each Lane | Poff | -26 | dBm | |||
| Transmitter Transition Time | 17 | ps | ||||
| Average Launch Power of OFF Transmitter, each Lane | Poff | -20 | dBm | |||
| Receiver | ||||||
| Center Wavelength | L0 | 1264.5 | 1271 | 1277.5 | nm | |
| L1 | 1284.5 | 1291 | 1279.5 | nm | ||
| L2 | 1304.5 | 1311 | 1317.5 | nm | ||
| L3 | 1324.5 | 1331 | 1337.5 | nm | ||
| Data Rate, each Lane | 53.125 ± 100 ppm | GBd | ||||
| Modulation Format | PAM4 | |||||
| Damage Threshold, each Lane | THd | 4.5 | dBm | 4 | ||
| Average Receive Power, each Lane | -7.3 | 3.5 | dBm | 5 | ||
| Receive Power (OMAouter), each Lane | 3.7 | dBm | ||||
| Difference in Receiver Power between any Two Lanes (OMAouter) | 4.1 | dBm | ||||
| Receiver Sensitivity (OMAouter), each Lane | SEN | Equation (1) | dBm | 6 | ||
| Stressed Receiver Sensitivity | SRS | -2.6 | dBm | 7 | ||
| Receiver Reflectance | RR | -26 | dB | |||
| LOS Assert | LOSA | -20 | dBm | |||
| LOS De-assert | LOSD | -10.3 | 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 | ||||
| SECQ – 10*log10(Ceq), Lane nder Test | 3.4 | dB | ||||
| OMAouter of each Aggressor Lane | 1.5 | dBm | ||||
| Notes: 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 for an extinction ratio of ≥ 4.5 dB or TDECQ < 1.3 dB for an extinction ratio of < 4.5 dB, the OMAouter (min) must exceed the minimum value specified here. 3. Ceq is a coefficient defined in IEEE Std 802.3-2018 clause 121.8.5.3 which accounts for reference equalizer noise enhancement. 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. The receiver shall be able to tolerate, without damage, continuous exposure to an optical input signal having this average power level. 6. Receiver sensitivity (OMAouter), each lane (max) is informative and is defined for a transmitter with a value of SECQ up to 3.9 dB. It should meet Equation (1), which is illustrated in Figure 4. 7. Measured with conformance test signal at TP3 for the BER equal to 2.4x10-4. 8. These test conditions are for measuring stressed receiver sensitivity. They are not characteristics of the receiver.
| ||||||
Digital Diagnostic Functions
The following digital diagnostic characteristics are defined over the normal operating conditions unless otherwise specified.
| Parameter | Symbol | Min | Max | Units | Notes |
| Temperature monitor absolute error | DMI_Temp | -3 | 3 | degC | 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 fibers, there could be an additional +/-1 dB fluctuation, or a +/- 3 dB total accuracy. | |||||