The Off Detector Electronics of the LHCb Muon Detector

The off detector electronics (ODE) board is the level-0 (L0) stage of the LHCb muon detector. Each board receives 192 digital inputs from the detector front end electronics at 40 MHz rate and provides L0 trigger and DAQ interfaces. 24 custom chips (SYNC), designed in radiation-hard technology, receive the incoming signals and implement bunch crossing synchronization, time measurements, fine time histograms and L0 pipelines. A board controller (L0 controller), developed in a flash-RAM based FPGA, manages the trigger interface via 12 channels parallel optical link and the DAQ interface via single optical link working at 1.6 Gbit/s each. A TTCrx chip is used to receive the LHCb master clock and the control signals and a CAN-bus based interface is used to communicate with the experimental control system (ECS). A total of 152 ODE boards are used in the muon system.