Upgrades to the CMS Cathode Strip Chamber System's Readout Electronics for the High Luminosity LHC

As the LHC prepares for the high-luminosity runs (HL-LHC), all detector systems must brace for approximately five times the LHC's nominal instantaneous luminosity. With higher luminosity, the particle flux in the muon Cathode Strip Chambers (CSC) segment closest to the beamline± is expected to quadruple from Run 2 levels. This presents two significant challenges: one is the need for higher bandwidths to accommodate the increased data, and the other is the requirement for electronics boards that can withstand high doses of radiation. To address these needs, upgrades to the CSC are divided into two phases. For the upgrade of the front-end electronics, an extensive program was accomplished during Long Shutdown 2. Upgrades to the back-end boards remain and will be installed during Long Shutdown 3. We present these planned upgrades, the current state of production, and the planned installation of the CSC electronics boards. A focus of this poster will be on the Optical Data Acquisition MotherBoards (ODMBs), which collect data from anode-wire and cathode-strip boards on the CSC detector.