Place of Origin:
Wuhan China
Brand Name:
Springtek
Certification:
ISO9001 RoHS FCC CE
Model Number:
S-QD4A31M01-CD-4
OEM QSFP-DD Compatible Juniper/Cisco 400G 1310nm DR4 500M MTP/MPO Optical Transceiver Module
QSFP-DD DR4 S-QD4A31M05-CD-4 230301.pdf
Ordering information
| Part Number | Product Description |
|
S-QD4A31M05-CD-4 |
QSFP-DD 400G 1310nm DR4 500M SMF MPO, 0ºC~+70ºC, With DDM |
Description
Springtek 400Gb/s QSFP-DD DR4 optical module designed for 500m optical communication applications. S-QD4A31M05-CD-4 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 Springtek 400Gb/s 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
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 | 500 | m | 2 |
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) |
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|
Common to Differential Mode Conversion Return Loss |
TP4 |
IEEE 802.3-2015 Equation(83E-3) |
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|
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. |
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Optical Characteristics
| Parameter | Symbol | Min | Typical | Max | Units | Notes |
| 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 | dB | |||
| Average Launch Power, each Lane | PAVG | -2.9 | 4 | dBm | 1 | |
|
Outer Optical Modulation Amplitude (OMAouter),each Lane |
POMA | -0.8 | 4.2 | dBm | 2 | |
|
Launch Power in OMAouter minus TDECQ, each Lane for ER ≥ 4.5dB for ER < 4.5dB |
-2.2 -1.9 |
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 | 21.4 | 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 | -15 | dBm | |||
| Receiver | ||||||
| Data Rate, each Lane | 53.125 ± 100 ppm | GBd | ||||
| Modulation Format | PAM4 | |||||
| Damage Threshold, each Lane | THd | 5 | dBm | 4 | ||
| Average Receive Power, each Lane | -5.9 | 4 | dBm | 5 | ||
| Receive Power (OMAouter), each Lane | 4.2 | dBm | ||||
|
Receiver Sensitivity (OMAouter), each Lane |
SEN |
Equation (1) |
dBm | 6 | ||
| Stressed Receiver Sensitivity | SRS | -1.9 | dBm | 7 | ||
| Receiver Reflectance | RR | -26 | dB | |||
| LOS Assert | LOSA | -15 | dBm | |||
| LOS De-assert | LOSD | -8.9 | 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 | 4.2 | dBm | ||||
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. |
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