DESCRIPTION
There is also a possibility of operating the IC with the dc supply voltage, being developed for large operating range. The integrated circuit is overload protected. FEATURES
D Three-tone ringing sequence with 800 Hz, 1067 Hz and 1333 Hz D Clock oscillator with ceramic resonator or LC series cct possible D Sequence frequency adjustable between 2.5 Hz and 25 Hz D Input protective diode D On-chip rectifier bridge D Protection circuit against ringing in a parallel circuit D D D D 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 D Suitable for German Post Office Specification, FTZ 121671 Pfl. 3, edition dated 24.03.82 22 m F 2.2 k W a ~ ~ b 0.8 m F 4 7 (5) 6 (7) 600 kW 10 (11) 43 kW 8 (9) 4.7 nF 9 (10) (15) 13 Ground: output signal Open: output signal (8) Supply 5 (6) Level monitoring Tone sequence oscillator Divider 32:1 Tone signal...
TEMIC Semiconductors
