single tone siren/alarm sound generator with soft chirp the RT0103 is a cmos design for single tone alarm sound application. the soft chirp only be generated within 200 seconds of the first sound. features low operating v oltage 2v ~ 5v cmos processon-chip rc oscillator low stand by current 2 seconds soft chirp electrical characteristics pin out and description absolute maximum ratings rato RT0103 2000.04.11 pin diagram osc2 osc1 ini gnd 1 2 3 4 8 7 6 5 softb vcc bz1 bz2 RT0103 symbol description pin i/o osc2 oscillator pin 1 i osc1 oscillator pin 2 o an internal pull-up resistor . might disable bz1, bz2 when connected to gnd. ini gnd softb ground audio output audio output power vcc = single t one open = single t one with 2 seconds soft chirp . bz1 bz2vcc 3 4 5 6 7 8 i o o parameter symbol min. typ. max. unit operating v oltage stand-by current operating current operating frequency bz1, bz2 driving current vcc isbiop ioh iol fop 2.0 1.0 1.0 3.0 30300 128 5.0 50500 v uaua ma ma khz symbol vcc vi vo tst ttp parameter supply v oltage input v oltage output v oltage storage t emperature operating t emperature rating -0.3 ~ 6 -0.3 ~ vcc +0.3 -0.3 ~ vcc +0.3 -40 ~125 0 ~ 65 unit v v v 1 vcc=3v , temp.=25 i
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