QSFP-DD MSA QSFP-DD Hardware Specification for QSFP …

1 QSFP-DD Hardware Rev QSFP-DD MSA Page 1 August 7, 2020 QSFP-DD MSA QSFP-DD Hardware Specification for qsfp DOUBLE DENSITY 8X PLUGGABLE TRANSCEIVER Revision August 7, 2020 Abstract: This Specification defines: the electrical and optical connectors, electrical signals and power supplies, mechanical and thermal requirements of the pluggable qsfp Double Density ( QSFP-DD ) module, connector and cage system. This document provides a common Specification for systems manufacturers, system integrators, and suppliers of modules. POINTS OF CONTACT: Ali Ghiasi (Current Technical Editor) Ghiasi Quantum 19947 Lindenbrook Lane Cupertino, CA 95014 ali at ghiasiquantum dot com Tom Palkert (Prior Technical Editor) at molex dot com Mark Nowell (Co-Chair) Cisco 170 West Tasman Dr San Jose, CA 95134 mnowell at cisco dot com Scott Sommers (Co-Chair) Molex 2222 Wellington Court Lisle, IL 60532-1682 at molex dot com Website: Limitation on use of Information: This Specification is provided "AS IS" with NO WARRANTIES whatsoever and therefore the provision of this Specification does not include any warranty of merchantability, noninfringement, fitness for a particular purpose, or any other warranty otherwise arising out of any proposal, Specification or sample.

2 The authors further disclaim all liability, including liability for infringement of any proprietary rights, relating to use of information in this Specification . No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted herein. Permissions: You are authorized to download, reproduce and distribute this document. All other rights are reserved. The provision of this document should not be construed as the granting of any right to practice, make, use or otherwise develop products that are based on the document. Any and all IP rights related to this document and the designs disclosed within, except for the rights expressly mentioned above, are reserved by the respective owners of those IP rights. Dedication: The members of the QSFP-DD MSA would like to acknowledge the contributions of Mr. Edmund Poh. He was an excellent engineer; his technical skills and collaborative attitude will be missed.

3 QSFP-DD Hardware Rev QSFP-DD MSA Page 2 August 7, 2020 The following are Promoter member companies of the QSFP-DD MSA. Broadcom Foxconn Interconnect Technology Lumentum Cisco Huawei Nvidia Corning Intel Molex II-VI Juniper Networks TE Connectivity The following are contributing member companies of the QSFP-DD MSA. Acacia Hisense Broadband Panduit ACON Hitachi Metals PHY-SI Alibaba Group Hewlett Packard Enterprise Ranovus Amphenol InnoLight Samtec Applied Optoelectronics Innovium Semtech Apresia Inphi Senko Celestica JPC Sicoya Ciena Kaiam The Siemon Company ColorChip Keysight Technologies Skorpios Credo Leoni Source Photonics DellEMC Lorom Cable Connection Spectra7 Microsystems Delta Products Luxshare ICT Spirent Dust Photonics Macom Sumitomo Electric Eoptolink Marvell US Conec Fourte MaxLinear xilinx Fujitsu MultiLane Yamaichi Genesis Connected Solutions NeoPhotonics H3C Nokia Change History: Revision Date Changes Sept 19, 2016 First public release March 13, 2017 Second public release Sept 19 2017 Third public release Sept 18, 2018 Fourth public release, Additions to thermal chapter 6, synchronous clocking in , Mechanical updates.

4 July 9, 2019 Fifth public release, Added Module type 2A, module label drawings, changes to latch drawings, added ePPS pin, updated power supply testing, added BiDi optical port assignments, updated cage drawings. August 7, 2020 Chapter 7-Management Interface is now part of Chapter 4-Electrical Specification . Port mapping, optical connectors, and module color coding moved out of Mechanical and Board Definition Chapter-5 and into a new Chapter-5. Foreword The development work on this Specification was done by the QSFP-DD MSA, an industry group. The membership of the committee since its formation on Feb 2016 has included a mix of companies which are leaders across the industry. QSFP-DD Hardware Rev QSFP-DD MSA Page 3 August 7, 2020 TABLE of CONTENTS 1 Scope .. 7 Description of Chapters .. 7 2 8 Industry 8 8 3 Introduction .. 9 Objectives .. 9 Applications.

5 10 4 Electrical Specification and Management Interface Timing .. 11 Electrical Connector .. 11 Low Speed Electrical Hardware Signals .. 15 ModSelL .. 15 ResetL .. 15 LPMode .. 15 ModPrsL .. 15 15 ePPS PTP Reference Clock (Optional) .. 15 Examples of QSFP-DD Host Board Schematic .. 16 Low Speed Electrical Specification .. 19 TWI Logic Levels and Bus Loading .. 19 Management 20 Management Interface Timing Specification .. 21 Bus timing tBUF .. 23 Bus timing tWR .. 23 Bus timing tNACK .. 23 Bus timing tBPC .. 24 Timing for soft control and status functions .. 25 High Speed Electrical 26 Rx(n)(p/n) .. 26 Tx(n)(p/n) .. 27 Power Requirements .. 27 Power Classes and Maximum Power Consumption .. 27 Host Board Power Supply Filtering .. 28 Module Power Supply Specification .. 29 Host Board Power Supply Noise Output .. 29 Module Power Supply Noise Output.

6 30 Module Power Supply Noise Tolerance .. 30 ESD .. 32 Clocking Considerations .. 32 Data Path Description .. 32 TX Clocking Considerations .. 32 Rx Clocking Considerations .. 32 5 Optical Port Mapping and Optical Interfaces .. 33 Electrical data input/output to optical port mapping .. 33 QSFP-DD Hardware Rev QSFP-DD MSA Page 4 August 7, 2020 Optical Interfaces .. 34 MPO Optical Cable connections .. 36 Dual LC Optical Cable connection .. 38 Dual CS Optical Cable connection .. 38 SN Quad Optical Cable connections .. 39 MDC Quad Optical Cable connection .. 39 SN Dual Optical Cable connections .. 40 MDC dual Optical Cable connection .. 40 Module Color Coding and Labeling .. 41 6 Mechanical and Board Definition .. 42 Introduction .. 42 Datums, Dimensions and Component Alignment .. 44 Module Mechanical 46 Module Flatness and Roughness .. 55 Module paddle card dimensions notes.

7 56 Module Extraction and Retention Forces .. 59 2x1 Electrical Connector Mechanical .. 59 2x1 Connector and Cage host PCB layout .. 64 Surface Mount Electrical Connector Mechanical .. 66 Surface mount connector and cage host PCB layout .. 72 7 qsfp -D Module Environmental and Thermal Requirements .. 74 Thermal Requirements .. 74 Thermal Requirements tighter controlled environments .. 74 External Case and Handle Touch 74 Appendix A Informative overall module length with elastomeric handle .. 75 Appendix B Informative Module Type 2A Heat Sink Examples .. 76 Appendix C Normative Module and Connector Performance Requirements .. 81 Performance Tables .. 81 QSFP-DD Hardware Rev QSFP-DD MSA Page 5 August 7, 2020 List of Tables Table 1- Pad Function 13 Table 2- Low Speed Control and Sense Signals .. 19 Table 3- Management Interface timing parameters.

8 22 Table 4- Timing for QSFP-DD soft control and status functions .. 25 Table 5- I/O Timing for Squelch & Disable .. 26 Table 6- Power Classes .. 28 Table 7- Truncated Filter Response Coefficients for Host Power Supply Noise Output .. 30 Table 8- Power Supply specifications, Instantaneous, sustained and steady state current limits .. 31 Table 9- Electrical Signal to Optical Port Mapping .. 33 Table 10- 44 Table 11- Module flatness specifications .. 55 Table 12- Temperature Range Class of operation .. 74 Table 13- Temperature Range Classes for Tighter Controlled Applications .. 74 Table 14- Form Factor Performance Requirements .. 81 Table 15- EIA-364-1000 Test Details .. 82 Table 16- Additional Test Procedures .. 83 List of Figures Figure 1: Application Reference Model .. 10 Figure 2: Module pad layout .. 12 Figure 3: Example QSFP-DD Host Board Schematic for Optical Modules .. 16 Figure 4: Example QSFP-DD Host Board Schematic for active copper cables.

9 17 Figure 5: Example QSFP-DD Host Board Schematic for passive copper cables .. 18 Figure 6: SDA/SCL options for pull-up resistor, bus capacitance and rise/fall times .. 20 Figure 7: QSFP-DD TWI Timing Diagram .. 21 Figure 8: Bus timing tWR .. 23 Figure 9: Bus timing tNACK .. 24 Figure 10: Bus timing tBPC .. 24 Figure 11: Recommended Host Board Power Supply Filtering .. 28 Figure 12: Instantaneous and sustained peak currents for Icc Host (see Table 8) .. 29 Figure 13: Truncated Transfer Response for Host Board Power Supply Noise Output measurement .. 30 Figure 14: Optical Media Dependent Interface port assignments .. 35 Figure 15: MPO-12 Single Row optical patch cord and module receptacle .. 36 Figure 16: MPO-16 Single Row optical patchcord and module receptacle .. 37 Figure 17: MPO-12 Two Row optical patchcord and module receptacle .. 37 Figure 18: Dual LC optical patchcord and module receptacle.

10 38 Figure 19: Dual CS connector module receptacle (in support of breakout applications) .. 38 Figure 20: SN quad optical connector plug and four-port module receptacle .. 39 Figure 21: MDC quad optical connector plug and four-port module receptacle .. 39 Figure 22: SN dual optical connector plug and four-port module receptacle .. 40 Figure 23: MDC dual optical connector plug and four-port module receptacle .. 40 Figure 24: 2x1 stacked cage and module .. 42 Figure 25: Press fit cage for surface mount (SMT) connector .. 43 Figure 26: Type 1 Pluggable module .. 43 Figure 27: Type 2 Pluggable module .. 43 Figure 28: 2X1 stacked connector/cage datum descriptions .. 45 Figure 29: Surface mount connector/cage datum descriptions .. 46 Figure 30: Type 1 Module .. 47 Figure 31: Type 2 Module .. 47 Figure 32: Type 2A Module .. 48 Figure 33: Drawing of module .. 51 Figure 34: Type 2A Module with Heat Sink.