MQD-F2F2C is a cost-effective module with high  performance, which is optimized for Datacenter,  supporting data-rate of 4 × 53.125 GBd PAM4 Optical interface and 8 × 26.5625 GBd PAM4  Electrical interface. Its transmission distance is up  to 100m on OM4/OM5 MMF. The module mainly  consists of two parts: the transmitter part and the  receiver part. The transmitter part consists of an  850nm VCSEL array and a driver. The receiver  part consists of a trans-impedance amplifier (TIA)  and a PIN photodiode array. The high-speed  electrical interface is based on low-voltage logic,  with nominal 100-ohm differential impedance, AC  coupled in the module. Users can access a series  of registers in transceiver to access monitoring  and configuration data through two wire serial  interfaces.