FeaturesQSFP-DD Serial Optical Interface 8x100G PAM4 retimed 800GAUI-8 electrical interface MPO-16 APC connector 8 channel VCSEL arrays and 8 channels PIN photo detector arrays Maximum......

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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