MTRQ-4S105-L 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 4 × 53.125 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.