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LINEAR INTEGRATED CIRCUIT
PROGRAMMABLE TELEPHONE SPEECH CIRCUIT
The LS288 is a monolithic integrated circuit in 16 lead dual in-line plastic
signed as a repla-
cement for the hybrid circuit in telephone sets it performs all the func
carried out by
this circuit.
With the LS288 it is possible to select the operating mode (fixed or
both piezoceramic and dynamic transducers and therefore its
sending and receiving paths,
can be preset by means of two external resistors. This fe
obtained in AGC operating
mode, when the device automatically adjusts the Rx/Tx gai
nsate for the line attenuation by
sensing the line current.
The LS288 can supply the decoupling FET when
g with an electret microphone. Output impe·
dance can be matched to the line independent
impedance.
LS288 Datasheet
