800G QSFP-DD SR8 850nm 100m MPO-16 APC
RQDD-800G-SR8
Applications
- 800GBASE-SR8 800G Ethernet
- Data center
1.General Description
RQDD-800G-SR8 is a Eight-Channel, Parallel, Pluggable, Fiber-Optic QSFP-DD for 800Gigabit Ethernet applications. This transceiver is a high performance module for short-reach data communication and interconnect application. It integrates eight data lanes in each direction with 8x53.125GBd. The transmission distance of QSFP-DD SR8 is up to 60 meters over OM3 MMF or 100 meters over OM4 MMF. This module is designed to operate over multimode fiber systems using a nominal wavelength of 850nm.
2. Absolute Maximum Ratings and Recommended Operating Conditions
Table 2.1 Absolute Maximum Ratings
| Parameter | Symbol | Min | Max | Unit |
| Storage Temperature | Ts | -40 | 85 | °C |
| Case Operating Temperature | Top | 0 | 70 | °C |
| Relative Humidity (non-condensation) | RH | 15 | 85 | % |
| Supply Voltage | Vcc | -0.5 | 3.6 | V |
| Receiver Damage Threshold, per Lane | PRdmg | 5 | | dBm |
Table 2.2 Recommended Operating Conditions
| Parameter | Symbol | Min | Max | Unit |
| Operating Case Temperature | Top | 0 | 70 | °C |
| Relative Humidity (non-condensation) | RH | 15 | 85 | % |
| Power Supply Voltage | Vcc | 3.135 | 3.465 | V |
| Total Power Consumption1 | Pc | - | 14 | W |
| Supply Current | | | 4.46 | A |
| Bit Rate | BR | | 850 | Gbps |
| Fiber Length on OM3 MMF | | | 60 | m |
| Fiber Length on OM4 MMF | | | 100 | m |
| I2C Clock Frequency | 0 | | 400 | kHz |
Notes:
1.Under condition of 3.465V operating supply voltage, and 70℃ case temperature.
3. Optical Specification
3.1 Optical Transmitter
Table 3.1 Transmitter Optical Interface
| Parameter | Symbol | Min | Typical | Max | Unit | | |
| Data rate per lane | DR | | 53.125 | | GBd | | |
| Modulation format | | PAM4 | | ||||
| Center Wavelength 1 | λ | 840 | 860 | 868 | nm | ||
| RMS spectral width | σ | | | 0.6 | nm | ||
| Average Launch power, each lane | Pavg | -4.6 | | 4 | dBm | ||
| Optical Power OMA, each Lane，max | POMA | 3.5 | dBm | ||||
| OMAouter, each lane min | max (TECQ, TDECQ) <1.8 dB | max [-2.6 , max(TECQ,TECQ) – 4.4] | dBm | ||||
| 1.8 < max (TECQ, TDECQ) < 4.4 dB | |||||||
| Transmitter and dispersion eye closure (TDECQ), each lane | TDECQ | | | 4.4 | dB | ||
| Transmitter eye closure for PAM4 (TECQ), each lane | TECQ | | | 4.4 | dB | ||
| Extinction ratio | ER | 2.5 | | | dB | ||
| Transmitter power excursion, each lane | | | | 2.3 | dBm | ||
| Optical Return Loss Tolerance | ORLT | | | 14 | dB | ||
| Optical Power for TX DISABLE | | | | -30 | dBm | ||
| Encircled fluxb2 | | ≥86% at 19 um ≤30% at 4.5 um | | ||||
Notes:
1. Defined according to the performance of the laser used.
2. Measured into type A1a.2 or type A1a.3, or A1a.4, 50 um fiber, in accordance with IEC 61280-1-4.
3.2 Optical Receiver
Table 3.2 Receiver Optical Interface
| Parameter | Symbol | Min | Typical | Max | Unit | |
| Data rate per lane | BR | | 53.125 | | GBd | |
| Modulation format | | PAM4 | | |||
| Center Wavelength | λ | 842 | 850 | 948 | nm | |
| Damage threshold | | 5 | | | dBm | |
| Average receive power, each lane | | –6.4 | | 4 | dBm | |
| Receive power, each lane (OMAouter) | | | | 3.5 | dBm | |
| Receiver reflectance | Rr | | | –15 | dB | |
| Receiver sensitivity, each lane1 | | RS = max (-4.6 , TECQ – 6.4) | dBm | |||
| Stressed receiver sensitivity, each lane | | | | –2 | dBm | |
| Rx LOS | Assert | | -15 | | | dBm |
| De-assert | | | | -7.5 | dBm | |
| Hysteresis | | 0.5 | | 5 | dB | |
Notes:
1. Receiver sensitivity is informative and is defined for a transmitter with a value of TECQ. Measured with conformance test signal at TP3 for BER = 2.4E-4 Pre-FEC.
4.Electrical Specification
Table 4.1 Electrical Specifications
| Parameters | Min | Typical | Max | Unit |
| Pre FEC Bit Error Ratio | | | 2.4E-4 | |
| Post FEC Bit Error Ratio | | | 1E-12 | |
| Transmitter (each Lane) | ||||
| Differential pk-pk Input Voltage tolerance | 750 | | | mV |
| Differential Termination Mismatch | | | 10 | % |
| Eye height | 10 | | | mV |
| Common-mode to differential-mode return loss | IEEE802.3ck Equation (120G–1) | dB | ||
| Vertical eye closure | | | 12 | dB |
| Effective return loss | 7.3 | | | dB |
| Transition Time | 10 | | | ps |
| Receiver (each Lane) | ||||
| Differential data output swing | 300 | | 900 | mVpp |
| Differential termination mismatch | | | 10 | % |
| Eye height | 15 | | | mV |
| Vertical eye closure | | | 12 | dB |
| Common-mode to differential-mode return loss | IEEE802.3ck Equation (120G–1) | | ||
| Effective return loss | 8.5 | | | dB |
| Transition time | 8.5 | | | ps |
5. Ordering Information
| Part Number | Temperature Range | Distance | Fiber Type | E/O | O/E |
| RQDD-800G-SR8 | 0 to 70℃ | 100m | MMF | VCSEL 850nm | PIN |
