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400G QSFP-DD FR4 2KM Optical Transceiver

Applications

400G BASE-FR4 Ethernet
Data Center Interconnect
InfiniBand Interconnect
Enterprise Networking

Features

Compliant to QSFP-DD MSA
4 CWDM lanes MUX/DEMUX design
100G Lambda MSA 400G-FR4 Specification compliant
Maximum power consumption 10W

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产品详细信息

RQDD-400G-FR4

400G QSFP-DD FR4 2km LC Optical Transceiver

This product is a 400Gb/s QSFP-DD optical module designed for 2km 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 400Gb/s optical transmission.

on the receiver side, the module optically de-multiplexes a 400Gb/s optical input into 4 channels of CWDM optical signals and converts them to 8 channels of 50Gb/s (PAM4) electrical output data.

The central wavelengths of the 4 CWDM channels are 1271,1291,1311 and 1331 nm as members of the CWDM wavelength grid defined in ITU-T G.694.2. Host FEC is required to support up to 2km fiber transmission.

400G QSFP-DD FR4

The RQDD-400G-FR4 transceiver is based on proprietary FIBERWDM PLC technology, using surface mounted opto-electronic devices with no free space elements. The unique design of the optical engine facilitates unparalleled compactness while maintaining Telcordia robustness.

Absolute Maximum Ratings

Parameter	Symbol	Min	Max	Units
Storage Temperature Range	Tsrg	-40	+85	℃
Supply Voltage	Vcc	0	4	V
Relative Humidity	RH	10%to 90% non-condensing

Operating Conditions

Parameter	Symbol	Min	Max	Units
Storage Temperature Range	Tsrg	-40	+85	℃
Supply Voltage	Vcc	0	4	V
Relative Humidity	RH	10%to 90% non-condensing

Wavelength Lane Assignments

Transmitter Parameter

Lane

Min

Typica

Max

Units

Lane Wavelength Range

Lane 0 Lane 1 Lane 2 Lane 3

1264.5

1284.5

1304.5

1324.5

1271

1291

1311

1331

1277.5

1297.5

1317.5

13375

Transmitter Optical Specifications

Transmitter Parameter	Lane	Min	Typical	Max	Units
Average launch Power per lane		-3.3		3.5	dBm
Total Average launch power				9.3	dBm
Dutter Optical Modulation Amplitude (OMA outer), each lane		-0.3		3.7	dBm
Difference in launch power between any two lanes (OMA outer)				4	dB
Average Launch Power per Lane @TX Off State				-20	dBm
Launch Power in OMA outer minus TDECQ, each Lane for ER ≥4.5dB for ER<4.5dB	-1.7 -1.6		dBm
Transmitter and Dispersion Eye Closure for PAM4, each Lane				3.4	dB
Extinction Ratio		3.5			dB
Relative Intensity Noise (OMA)				-136	dB/Hz
Side-Mode Suppression Ration (SMSR)		30			dB
Optical Return Loss Tolerance				17.1	dB
Transmitter Reflectance				-26	dB
Transmitter Output Power Monitoring Accuracy		-3		3	dB
TDECQ-10*log10(Ceq), each Lane				3.4	dB
Transmitter transition time				17	ps

High Speed Electrical Specifications

Parameter	Min	Typical	Max	Units Notes
Receiver electrical output characteristics at TP4
Signaling rate per lane		26.5625		GBd
AC common-mode output voltage (RMS)			17.5	mV
Differential peak-to-peak output voltage			900	mV
Near-end ESMW (Eye symmetry mask width)		0.265		UI
Near-end Eye height, differential	70			mV
Far-end ESMW (Eye symmetry mask width)		0.2		UI
Far-end Eye height, differential	30			mV
Far-end pre-cursor ISl ratio	-4.5		2.5	%
Differential output return loss	9.5-0.37f			dB	0.01-8GHz
Differential output return loss	4.75-7.4log 10 (f/14)			dB	8-19 GHz
Common to differential mode conversion return loss	22-20(f/25.78)			dB	0.01-12.89GHz
Common to differential mode conversion return loss	15-6log 10 (f/25.78)			dB	12.89-19 GHz
Differential termination mismatch			10	%
Transition time (min,20%to 80%)	9.5			ps
DC common mode voltage	-350		2850	mV
Transmitter electrical input characteristics at TP1
Signaling rate, per lane		26.5625		GBd
Differential pk-pk input voltage tolerance	900			mV
Differential input return loss	9.5-0.37f			dB	0.01-8GHz
Differential input return loss	4.75-7.4log 10 (f/14)			dB	8-19 GHz
Differential to common mode input return loss	22-20(f/25.78)			dB	0.01-12.89GHz
Differential to common mode input return loss	15-6log 10 (f/25.78)			dB	12.89-19 GHz
Differential termination mismatch			10	%
Module stressed input test	Per Section 120E.3.4.1 IEEE802.3bs
Single-ended voltage tolerance range	-0.4		3.3	V
Common-mode voltage	-350		2850	mV

Receiver Output Power Thresholds for Loss of Signal (LOS)

Parameter	Min	Typica Max	Units
RX_LOS_Assert Min/Max	-20.0		dBm
RX_LOS_De-Assert Min/Max			dBm
RX_LOS_Hysteresis	0.5		dB

Digital Diagnostic Monitoring Specifications

Parameters	Unit	Specification
Temperature Monitor absolute error	degC	±3
Voltage Monitor absolute error	%	±5
_bias Monitor absolute error	%	±10
Received Power (Rx)Monitor absolute error	dB	±3.0
Transmit Power (Tx)Monitor absolute error	dB	±3.0

QSFP-DD Edge Connector and Pinout Description

The electrical pinout of the QSFP-DD module is shown in Figure 2 below.

400G QSFP-DD FR4

Figure 1. Host PCB QSFP-DD pad assignment top view

Mechanical Specifications

400G QSFP-DD FR4

Ordering information

Part Number	Description
RQDD-400G-FR4	400G QSFP-DD FR4 Optical Transceiver

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