However with little modifications the IC can be easily utilized for normal applications, in circuits where a double tone alarm may be required.
Basically the IC is a 8-pin DIL chip resembling the IC 555 and has the following specs:
Very low current consumption yet good audible response at the output.
Internal built-in rectifier stage for rectifying an AC input supply, a filter capacitor is also a built-in feature of the IC.
Hardly any external components required for setting up the circuit.
The tone of the output musical audio can be adjusted externally through a resistor.
If the IC os used inside a landline telephone then the supply to the IC is derived from the line voltage via a 1uF capacitor.
The IC is able to drive a piezo electric transducer directly without the need of inductors or amplifiers.
The IC is also capable of driving a small loudspeaker directly for generating the musical output.
However the speaker must be rated at minimum of 50 Ohms.
The following 2 tone ringtone generator circuit shows how to configure the IC LS1240 as a two tone musical signal generator circuit.