Optical disc ICs Muting IC for portable CD players BA3124F The BA3124F is an IC developed for line output muting in portable CD players, and uses control pin switching to achieve line muting and to eliminate the dull thump that occurs when the power is turned on or off. FApplications Portable CD players, CD-ROM drives and other devices with line output. FFutures 1) Mute attenuation. (63dB) 2) ON and OFF control terminals. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions FBlock diagram 151 Optical disc ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 3.0V, f = 1kHz) FMeasurement circuit FMeasurement circuit switch table 152 BA3124F Optical disc ICs BA3124F FApplication example FElectrical characteristic curves (Ta = 25_C) FExternal dimensions (Units: mm) 153