the following example is for you reference.


Features:

  

 QSFP-DD MSA compliant
Compliant to IEEE 802.3bs 400GBASE-LR8
Digital diagnostic monitoring support
Hot pluggable 76 pin electrical interface
8 LAN-WDM lanes MUX/DEMUX design
53.125Gbit/s PAM4 Channel Electrical Serial Interface (400GAUI-8)
Maximum power consumption 14.5W
LC duplex connector
Supports 425Gb/s bit rate
up to 10km transmission on single mode fiber
Operating case temperature: 0℃ to 70℃
Single 3.3V power supply
RoHS 2.0 compliant

Technical details:
1.QSFP-DD uses common ground (GND) for all signals and supply (power). All are comon within the QSFP-DD module and all module voltages are referenced to this po-te-nial unless otherwise noted. Connect these directly to the host board signal-common ground plane.
2.VccRx, VccRx1, Vcc1, Vcc2, VccTx and VccTx1 shall be applied concurrently.Requirements defined for the host side of the Host Card Edge Connector. VccRx, VccRx1, Vcc1, Vcc2, VccTx and VccTx1 may be internally connected within the module in any combination. the connector Vcc pins are each rated for a maximum current of 1000 mA.
3.All Vendor Specific, Reserved and No Connect pins may be terminated with 50ohms to ground on the host. Pad 65 (No Connect) shall be left unconnected within the module. Vendor specific and Reserved pads shall have an impedance to GND that is greater than 10K ohms and less than 100pF.