The HG Genuine MQD-12F1C Transceiver is a  high performance, cost effective module for serial  optical data communication applications to  400Gbps, The MQD-12F1C is designed to  Datacenter, accept 400G Ethernet protocol traffic  for 70m@OM3or100m@OM4 links. The module mainly consists of two parts: the  transmitter part and the receiver part. The  transmitter part consists of 8chs 850nm VCSEL  array and driver. The receiver part consists of 8chs  trans-impedance amplifier (TIA) and PIN  photodiode array.  The high-speed electrical interface is based on  low-voltage logic, with nominal 100ohm differential  impedance, AC coupled inter of module.  Users can access to a series of registers to  monitor and configure data through two wire serial  interface.