·         Support Flex-grid channel spacing DWDM in C-band

·         Support Client-side Interfaces: 400GAUI-8

·         Support Line-side DP-16QAM with CFEC

·         Standard QSFP-DD type 2 form factor

·         76pin QSFP-DD MSA compliant connector

·         Compliant to CMIS 5.0

·         Compliant to OIF Implementation Agreement for Coherent CMIS, Rev 01.1

·         OIF-400ZR-01.0_reduced2.pdf

·         RoHS compliant

Absolute Maximum Ratings

The absolute maximum ratings given in the table below define the damage thresholds. Hence, the component shall withstand the given limits without any irreversible damage.

Operating Conditions

The 400G ZR QSFP-DD DCO is a Power Class 8 module. In order to avoid exceeding the host system power capacity, upon hot-plug, power cycle or reset, all QSFP-DD modules shall power up in Low Power Mode if LPMode is asserted. If LPMode is not asserted the module will proceed to High Power Mode without host intervention. Specification values for maximum instantaneous, sustained and steady state currents at each power class are given in below table. The power supply requirements are specified in the table below.

High Speed Electrical Specifications

The transmitter and receiver comply with the CEI-56G-VSR-PAM4 electrical specification (OIF-CEI-04.0).

The data lines are AC-coupled and terminated in the module per the following figure from the QSFP-DD MSA. The high-speed signals follow the electrical specifications of CEI-56G-VSR-PAM as defined in OIF-CEI- 04.0.

The high speed signals consist of 8 transmit and 8 receive differential pairs identified as TX[8:1]p / TX[8:1]n and RX[8:1]p / RX[8:1]n. These signals can be operated in 400GAUI-8 depending on the capability of the host. 400GAUI-8 mode provides 8 differential lanes using PAM4 signaling operating at 26.5625 GBaud. This results in 8 lanes of 50Gb/s for a total of 400Gb/s. This mode allows connection to PMD configurations of 400GUAI-8.

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

Electrical Characteristics for Transmitter

Electrical Characteristics for Receiver

Optical Transmitter

Notes:

1.          C band 75GHz ITU-T grid. Frequency range over which the specifications hold unless noted otherwise.

2.          Difference over temperature, time, wavelength and aging.

3.          Difference between the set value and actual value over aging.

Optical Receiver

 Notes:

1.          Signal power of the channel at the OSNR Penalty < 0.5dB

2.          Input power needed to achieve post FEC BER < 1E-15 when OSNR Tolerance > 26 dB/0.1nm

3.          Tolerance to PMD with < 0.5 dB penalty to OSNR sensitivity.

4.          Tolerance to peak PDL with < 1.3 dB penalty to OSNR sensitivity when change in SOP is < =1 rad/ms.

5.          Tolerance to change in input power with<0.5 dB penalty to OSNR sensitivity.

6.          From module reset, with valid optical input signal present.

 Loopback

The module support loopback functionality. The host loopback (Loopback ①) and the network loopback (Loopback ②) are shown at bellowing figure. For details on controlling the loopback mode, please refer to Reference [2]. In optional loopback, TXn is looped back to RXn, for example TX0+ to RX0+, on both host and media side.

 Insertion, Extraction and Retention Force

 EMI, EMC and ESD Specifications

The module is compliant with the requirements listed in the table below when installed in the host equipment.

 
Laser Safety

This is a Class 1 Laser Product according to IEC 60825-1:2007. This product complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated (June 24, 2007).

Don’t directly look into the transmitter fiber connector at any time while the module is in operation.