LS342 Datasheet (SGS) - MULTIFREQUENCY TO TELEPHONE LINE INTERFACE CIRCUIT

LS342, MULTIFREQUENCY TO TELEPHONE LINE INTERFACE CIRCUIT

LINEAR INTEGRATED CIRCUIT MULTIFREQUENCY TO TELEPHONE LINE INTERFACE CIRCUIT The LS342 is a monolithic integrated circuit in dual in-line minidip plastic package.

It interfaces the multifrequency tone diallers M751 and M761/761A to the line in telephone sets, performing the follow ing functions: Adjustment of the DC current/voltage characteristic and AC input line impedance by means of an external resistor (Rd.

Sending to the line of the multifrequency signal.

Adjustment of the signal leve