800G QSFP-DD SR8 850nm 100m MPO-16 APC
RQDD-800G-SR8
	
Applications
	
	
	
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 | 
	
	
	
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