400Gb/s QSFP-DD SR8 100m Transceiver

This product is a parallel 400Gb/s Quad Small Form Factor Pluggable--double density (QSFP-DD) optical module. It provides increased port density and total system cost savings. The QSFP-DD full- duplex optical module offers 8 independent transmit and receive channels, each capable of 53.125Gb/s operation for an aggregate data rate of 400Gb/s on 100 meters of OM3 multi-mode fiber. An optical fiber cable with an MTP/MPO-16 connector can be plugged into the QSFP-DD SR8 module receptacle. Proper alignment is ensured by the guide pins inside the receptacle. The cable usually cannot be twisted for proper channel to channel alignment. Electrical connection is achieved through an QSFP-DD MSA-compliant edge type connector. The central wavelengths of all the 8 parallel lanes are 850nm. It contains an optical MPO-16 connector for the optical interface and a 60-pin connector for the electrical interface. Host FEC is required to support up to 70m OM3 multi-mode fiber transmission. The product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP-DD Multi-Source Agreement (MSA) Type 2. It has been designed to meet harshest external operating conditions including temperature, humidity and EMI interference.

Features
● QSFP-DD MSA compliant
● 8 parallel lanes on 850nm center wavelength
● Compliant to IEEE 802.3bs Specification
● Up to 100m transmission on multi-mode fiber (MMF) OM3 with FEC
● Operating case temperature: 0 to 70oC
● 8x53.125Gb/s electrical interface (400GAUI-8)
● Data Rate 53.125Gbps (PAM4) per channel.
● Maximum power consumption 12W
● MPO-16 connector
● RoHS compliant

Transceiver Block Diagram

Figure 1. Transceiver Block Diagram

Optical interface and Pin Assignment

The electrical pinout of the QSFP-DD module is shown as Figure 2. And Figure 3 shows the optical interface of MPO-16.

Figure 2. MSA Compliant Connector

Figure 3. MPO-16 Optical Connector Interface

Pin Definition

Recommended Power Supply Filter

Figure 4. Recommended Power Supply Filter

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.

Recommended Operating Conditions and Power Supply Requirements

Notes:

1. FEC provided by host system.

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

Electrical Characteristics

The following electrical acteristics are defined over the Recommended Operating Environment unless otherwise specified.

Notes:

1. With the exception to IEEE 802.3bs 120E.3.1.2 that the pattern is PRBS31Q or scrambled idle.

2. Meets BER specified in IEEE 802.3bs 120E.1.1.

3. DC common mode voltage generated by the host. Specification includes effects of ground offset voltage.

Optical Characteristics

Notes:

1. Average launch power, each lane (min) is informative and not the principal indicator of signal strength.
A transmitter with launch power below this value cannot be compliant; however,
a value above this does not ensure compliance.

2. Even if the TDECQ < 1 dB, the OMAouter (min) must exceed the minimum value specified here.

3. The receiver shall be able to tolerate, without damage, continuous exposure to an optical input signal having this average power level.

4. Average receive power, each lane (min) is informative and not the principal indicator of signal strength. A received power below this value cannot be compliant;
however, a value above this does not ensure compliance.

5. Receiver Sensitivity OMAouter, each lane (max) is informative and is defined for a BER of 2.4x10-4.

6. Measured with conformance test signal at receiver input for the BER of 2.4x10-4.

7. These test conditions are for measuring stressed receiver sensitivity. They are not acteristics of the receiver.

Digital Diagnostic Functions

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

Notes:

1. Due to measurement accuracy of different fibers, there could be an additional +/-1 dB fluctuation, or a +/- 3 dB total accuracy.

Outline Drawing (mm)

Applications

● Data Center Interconnect

● 400G Ethernet

● InfiniBand interconnects

● Enterprise networking