U4076B-FL
Overview
The three-tone ringing integrated circuit U4076B, in conjunction with a piezo transducer or loudspeaker replaces the normal electromechanical telephone bell. It is operated with the ringing current from the exchange.
- Three-tone ringing sequence with 800 Hz, 1067 Hz and 1333 Hz
- Clock oscillator with ceramic resonator or LC series cct possible
- Sequence frequency adjustable between 2.5 Hz and 25 Hz
- Input protective diode
- On-chip rectifier bridge
- Protection circuit against ringing in a parallel circuit *
- D Adjustable volume Push-pull output stage Piezo transducer or loudspeaker connection Common input for frequency and call recognition Reduced pulse duration for electromagnetic transducers Benefit
- Suitable for German Post Office Specification,
