BU8710AKS

Communication ICs 4-channel ADPCM transcoder for digital cordless telephone base stations BU8710AKS This is an ADPCM transcoder which conforms to the G.721 standards listed in the 1988 edition of the CCITT recommendations. Simultaneous processing of four encoder and decoder channels is possible, enabling superb affinity with the quadruple TDMA which is a standard for PHS (personal handy phone) systems. In turn, this enables voice processing units for individual base stations in the public telephone network to be configured on single chips. FApplications PHS base stations FFeatures 1) Can be connected to µ-law and A-law PCM codec through a serial interface. (Both long frames and short frames can be accommodated.) 2) Various functions can be controlled through a CPU interface. 3) An internal power save mode can be controlled separately for individual channels. (Separate encoder and decoder control are possible.) In addition, external pin control enables power consumption to be reduced for the chip as a whole. 4) An internal muting function can be controlled separately for individual channels. (Separate encoder and decoder control are possible.) 5) An internal function silence detection is provided, which can be controlled separately for individual channels. (Applicable only to encoders.) 6) An internal background noise generation function is provided, which can be controlled separately for individual channels. (Applicable only to decoders.) 7) The G.711 (µ-law or A-law) outpu...