Ascent’s QSFP-DD-LR4-10 is a 400Gb/s Quad Small Form Factor Pluggable-double density (QSFP-DD) optical module designed for 10 km optical communication applications. The 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 400 Gb/s optical transmission. Reversely, on the receiver side, the module optically de-multiplexes a 400 Gb/s optical input into 4 channels of CWDM optical signals, and converts them to 8 channels of 50 Gb/s (PAM4) electrical output data.
• Compliant with 100G Lambda MSA: 400GBASE-LR4-10 optical interface
• Compliant with IEEE 802.3bs standard: 400GAUI-8 electrical interface
• Compliant with QSFP-DD MSA HW Rev 5.1 type 2 housing with duplex LC connector
• Compliant with QSFP-DD CMIS Rev 4.0
• Operating distance at engineering link of up to 10 km
• Maximum power consumption 10 W
• Case operating temperature 0 °C to +70 °C
• Two wire serial Interface with digital diagnostic monitoring
• Complies with EU Directive 2011/65/EU (RoHS compliant)
• Class 1 Laser
Parameter | Symbol | Min. | Max. | Unit | Note |
Storage Temperature | TS | ‑40 | 85 | °C | |
Supply Voltage | VCC | ‑0.5 | 3.6 | V | |
Relative Humidity (non‑condensing) | RH | 5 | 95 | % | Non‑condensing |
Data Input Voltage Differential | lVDIP‑VDINl | ‑ | 1 | V | |
Control Input Voltage | VI | ‑0.3 | VCC+0.5 | V | |
Control Output Voltage | VO | ‑20 | 20 | V |
Recommended Operating Conditions
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Operating Case Temperature | TOPR | 0 | ‑ | 70 | °C | |
Power Supply Voltage | VCC | 3.135 | 3.3 | 3.465 | V | |
Instantaneous Peak Current at Hot Plug | ICC_IP | ‑ | ‑ | 4000 | mA | |
Sustained Peak Current at Hot Plug | ICC_SP | ‑ | ‑ | 3300 | mA | |
Maximum Power Dissipation | PD | ‑ | ‑ | 10 | W | |
Maximum Power Dissipation, Low Power Mode | PDLP | ‑ | ‑ | 1.5 | W | |
Signaling Rate per Lane | SRL | ‑ | 53.125 | ‑ | GBd | 1 |
Two Wire Serial Interface Clock Rate | ‑ | ‑ | ‑ | 400 | kHz | |
Power Supply Noise Tolerance | ‑ | ‑ | ‑ | 66 | mV | 2 |
Rx Differential Data Output Load | ‑ | ‑ | 100 | ‑ | Ω | |
Operating Distance | ‑ | 2 | ‑ | 10000 | m |
Notes:
1. PAM4
2. 10 Hz to 10 MHz
Electrical Specification High Speed Signal (Compliant with IEEE 802.3bs 400GAUI‑8)
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Receiver (Module Output) | ||||||
AC Common‑Mode Output Voltage (RMS) | ‑ | ‑ | 17.5 | mV | ||
Differential Output Voltage | ‑ | ‑ | 900 | mV | ||
Near‑End Eye Height, Differential | 70 | ‑ | ‑ | mV | ||
Far‑End Eye Height, Differential | 30 | ‑ | ‑ | mV | ||
Far End Pre‑Cursor Ratio | ‑4.5 | ‑ | 2.5 | % | ||
Differential Termination Mismatch | ‑ | ‑ | 10 | % | ||
Transition Time (Min., 20% To 80%) | 9.5 | ‑ | ‑ | ps | ||
DC Common Mode Voltage | ‑350 | ‑ | 2850 | mV | ||
Transmitter (Module Input) | ||||||
Differential pk‑pk Input Voltage Tolerance | 900 | ‑ | ‑ | mV | ||
Differential Termination Mismatch | ‑ | ‑ | 10 | % | ||
Single‑Ended Voltage Tolerance Range | ‑0.4 | ‑ | 3.3 | V | ||
DC Common Mode Voltage | ‑350 | ‑ | 2850 | mV |
Electrical Specification Low Speed Signal (compliant with QSFP‑DD HW Rev 5.0)
Parameter | Symbol | Min. | Max. | Unit | Note |
Module Output SCL and SDA | VOL | 0 | 0.4 | V | |
Module Input SCL and SDA | VIL | ‑0.3 | VCC*0.3 | V | |
VIH | VCC*0.7 | VCC+0.5 | V | ||
InitMode, ResetL, and ModSelL | VIL | ‑0.3 | 0.8 | V | |
VIH | 2 | VCC+0.3 | V | ||
IntL | VOL | 0 | 0.4 | V | |
VOH | VCC‑0.5 | VCC+0.3 | V |
Optical Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note | |
Transmitter | |||||||
Wavelength L0 | λC0 | 1264.5 | 1271 | 1277.5 | nm | ||
Wavelength L1 | λC1 | 1284.5 | 1291 | 1297.5 | nm | ||
Wavelength L2 | λC2 | 1304.5 | 1311 | 1317.5 | nm | ||
Wavelength L3 | λC3 | 1324.5 | 1331 | 1337.5 | nm | ||
Side Mode Suppression Ratio | SMSR | 30 | ‑ | ‑ | dB | ||
Average Launch Power, each Lane | AOPL | ‑3.3 | ‑ | 3.5 | dBm | 1 | |
Outer Optical Modulation Amplitude (OMAouter), each Lane | TOMA | ‑0.3 | ‑ | 3.7 | dBm | ||
Outer Optical Modulation Amplitude (OMAouter), each lane: for TDECQ<1.4dB for 1.4≤TDECQ≤3.4dB |
TOMA |
0.3 ‑1.1+ TDECQ |
dBm dBm | ||||
Difference in Launch Power between any Two Lanes (OMAouter) | DP | ‑ | ‑ | 4 | dB | ||
Transmitter and Dispersion Eye Closure for PAM4 (TDECQ), each Lane | TDECQ | ‑ | ‑ | 3.9 | dB | ||
Transmitter Eye Closure for PAM4 (TECQ) | TECQ | ‑ | ‑ | 3.9 | |||
| TDECQ ‑ TECQ | | ‑ | ‑ | ‑ | 2.5 | dB | ||
Over/Under‑Shoot | ‑ | ‑ | ‑ | 25 | % | ||
Transmitter Peak‑to‑Peak Power | ‑ | ‑ | ‑ | 5.2 | dBm | ||
Average Launch Power of OFF Transmitter, each Lane | TOFF | ‑ | ‑ | ‑16 | dBm | ||
Extinction Ratio, each lane | ER | 3.5 | ‑ | ‑ | dB | ||
Transmitter Transition Time | TT | ‑ | ‑ | 17 | ps | ||
RIN15.6OMA | RIN | ‑ | ‑ | ‑136 | dB/Hz | ||
Optical Return Loss Tolerance | ORL | ‑ | ‑ | 15.6 | dB | ||
Transmitter Reflectance | TR | ‑ | ‑ | ‑26 | dB | ||
Receiver | |||||||
Wavelength L0 | λC0 | 1264.5 | 1271 | 1277.5 | nm | ||
Wavelength L1 | λC1 | 1284.5 | 1291 | 1297.5 | nm | ||
Wavelength L2 | λC2 | 1304.5 | 1311 | 1317.5 | nm | ||
Wavelength L3 | λC3 | 1324.5 | 1331 | 1337.5 | nm | ||
Damage Threshold, each Lane | AOPD | 6.1 | ‑ | ‑ | dBm | ||
Average Receive Power, each Lane | AOPR | ‑9 | ‑ | 5.1 | dBm | 2 | |
Receive Power (OMAouter), each Lane | OMAR | ‑ | ‑ | 4.4 | dBm | ||
Difference in Receive Power between any Two Lanes (Omaouter) | DR | ‑ | ‑ | 4.3 | dB | ||
Receiver Reflectance | RR | ‑ | ‑ | ‑26 | dB | ||
Receiver Sensitivity (OMAouter), each lane: for TECQ <1.4dB for 1.4≤TECQ≤3.4dB | SOMA | ‑ | ‑ |
‑6.8‑8.2+TECQ |
dBm dBm | ||
Stressed Receiver Sensitivity (OMAouter), each lane | SRS | ‑ | ‑ | ‑4.3 | dBm | ||
Conditions of Stressed Receiver Sensitivity Test | |||||||
Stressed Eye Closure for PAM4 (SECQ) | ‑ | ‑ | 3.9 | ‑ | dB | ||
OMAouter of each Aggressor Lane | ‑ | ‑ | ‑0.4 | ‑ | dBm | ||
Notes:
1. Average launch power, each lane (min) is informative and not the principal indicator of signal strength.
2. Average receive power, each lane (min) is informative and not the principal indicator of signal strength.
Digital Diagnostics
Parameter | Range | Accuracy | Unit | Calibration |
Temperature | 0 to 70 | ±3 | °C | Internal |
Voltage | 0 to VCC | 0.1 | V | Internal |
Tx Bias Current (each Lane) | 0 to 100 | 10% | mA | Internal |
Tx Output Power (each Lane) | ‑2.7 to +5.1 | ±3 | dB | Internal |
Rx Receive Power (each Lane) | ‑9 to +5.1 | ±3 | dB | Internal |
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