The UBA2050, UBA2050A, UBA2051, UBA2051A and UBA2051C are telephony ICs for application in linepowered electronic telephone sets. They offer all line interface functions, speech functions, dialling and ringerfunctions. They perform the interface between the telephone line and transducers such as microphone capsule,earpiece and buzzers. The transmission part is in the range of the TEA106x- and TEA111x-family. The ICscontain also a dialler circuit for DTMF and pulse dialling. An integrated supply VDD with internal voltage regulatorsupplies the dialler and is available as supply point for external use.
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