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400G QSFP-DD EDR4 SM MPO12 2km Optical Transceiver

Features

IEEE 802.3bs Specification compliant
QSFP-DD MSA compliant
4x106.25 Gbps PAM4 optical interface
8x53.125 Gbps PAM4 electrical interface
I2C interface with integrated DDM
Up to 2km transmission distance on single mode fiber (SMF) with FEC
up ply voltage: 3.3 V
Maximum power consumption: 12 W
MTP/MPO-12 connector
Operating case temperature: 0 to 70 °C
RoHS compliant

Applications

400G Ethernet
Datacenter enterprise networking

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產品詳細信息

RQDD-400G-EDR4

400Gbps QSFP-DD EDR4 2KM EML MPO transceiver

400G QSFP-DD EDR4

General description

RQDD-400G-EDR4 is a 400 Gbps Quad Small Form Factor Pluggable-Double Density (QSFP-DD) optical transceiver designed for 2km optical communication applications.

Functional description

The module incorporates 4 parallel channels on 1310 nm center wavelength operating at 100 Gbps per channel. The transmitter path incorporates a quad channel electro- absorption modulated laser (EML) driver together with 4 parallel EMLs. On the receiver path, 4 photodiodes (PDs) are connected with a quad channel transmission impedance amplifier (TIA) to convert the parallel 400 Gbps optical input into 4 channels of parallel 100Gbps PAM4 electrical signals. A digital signal processor (DSP) is used to convert 8 channels of 25 GBaud PAM4 signals into 4 channels of 50 GBaud PAM4 signals and also an 8-channel retimber and forward error corrector (FEC) block are integrated in this DSP. The electrical interfaceter is compliant with IEEE 802.3bs and QSFP-DD MSA in the transmitting and receiving directions, and the optical interface is compliant to QSFP-DD MSA with MTP/MPO-12 connector.

A single +3.3 V power supply is required to power up this product. As per MSA specifications, the module offers 7 low speed hardware control pins: SCL, SDA, ModSelL, ResetL, LPMode/TxDis, ModPrsL and IntL/RxLOSL. SCL and SDA are a 2-wire serial interface between the host and module using the I2C protocol. SCL is defined as the serial interface clock signal and SDA as the serial interface data signal. Both signals are open- drain and require pull-up resistors to +3.3 V on the host side. The pull-up resistor value should be 4.7 kohms to 10 kohms.

ModSelL is an input pin. When held low by the host, this product responds to 2-wire serial communication commands. ResetL is a signal that allows the host to reset the module. A low level on the ResetL signal for longer than the minimum pulse length initiates a complete modulele reset, returning all all user module setting Sule settings tos to their default state. LPMode/TxDis is an input signal from the host operating with active high logic. If this pin is “high”, the module enters a low-power state. ModPrsL is used to indicate whether the module is plugged in on the connector, ModPrsL is pulled low when inserted and released to high when it is physically absent from the host connector. IntL/RxLOSL pin is used as interruption. When “Low”, it indicates a possible module operational fault, such as alarm and warning.

Absolute maximum ratings

It has to be noted that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module.

Parameter	Symbol	Min	Max	Unit	Note
Storage Temperature	TS	-40	85	°C
Operating Case Temperature	TOP	0	70	°C
Power Supply Voltage	VCC	-0.5	3.6	V
Relative Humidity (non-condensation)	RH	0	85	%

Recommended operating conditions

Parameter	Symbol	Min	Typical	Max	Unit	Note
Operating Case Temperature	TOP	0		70	°C
Power Supply Voltage	VCC	3.135	3.3	3.465	V
Power Consumption				12	W
Supply Current	Icc			3.64	A
Pre-FECBitError Ratio				2.4x10-4
Post-FECBitError Ratio				1x10-12		1
Link Distance	D			2	km	2

Notes:

1. FEC provided by host system.

2. FEC required on host system to support maximum distance.

Digital diagnostic functions

The following digital diagnostic characteristics are defined over the normal operating conditions unless otherwise specified.

Parameter

Symbol

Min

Max

Unit

Note

Temperature Monitor

Absolute Error outer Error

DMI_Temp

-3

°C

Cover full operating

temperature range

Supply Voltage Monitor

Absolute ErroruteError

DMI _VCC

-0.1

0.1

Cover full operating

temperature range

Channel RX Power Monitor

Absolute ErrorteError

DMI_RX_Ch

-3

Channel Bias Current

Monitor

DMI_Ibias_Ch

-10%

10%

Channel TX Power Monitor

Absolute Error

DMI_TX_Ch

-3

Edge connector and pinout description

The electrical pinout of the QSFP-DD module is shown in Figure 1 below.

400G QSFP-DD EDR4

MSA compliant connector.

Mechanical dimensions

400G QSFP-DD EDR4

Mechanical outline

Ordering information

Part Number	Product Description
RQDD-400G-EDR4	400G QSFP-DD EDR4 2KM EML MPO

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