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LS285A

SGS
Part Number LS285A
Manufacturer SGS
Description TELEPHONE SPEECH CIRCUITS
Published Sep 22, 2017
Detailed Description LINEAR INTEGRATED CIRCUITS TELEPHONE SPEECH CIRCUITS The LS285 and LS285A are monolithic integrated circuits for replac...
Datasheet PDF File LS285A PDF File

LS285A
LS285A

Overview
LINEAR INTEGRATED CIRCUITS TELEPHONE SPEECH CIRCUITS The LS285 and LS285A are monolithic integrated circuits for replacement of the hybrid circuit (2-4 wire interface) in conventional telephones interfacing the two transducers to the line and providing a controlled amount of sidetone.
The same type of transducer can be used for both transmitter and receiver, usually a 3500 dynamic type.
By sensing the line current, LS285 and LS285A adjust the gain in both directions to compensate for line attenuation.
Output impedance can be matched to the line, independent of transducer impedance.
The LS285 and LS285A are packaged in a 14 lead dual in-line plastic package.
ABSOLUTE MAXIMUM RATINGS Line vo...


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