Contextual Info: O K I Semiconductor MSM9560/MSM9561 1C for FM Multiplex Data Demodulation GENERAL DESCRIPTION TheMSM9560/MSM9561 is anIC which demodulates FM character multiplex signals in the DARC Data Radio Channel *1 format to obtain digtal data. The MSM9560 operates at 4.5 to 5.5 V and the