The TCM1501B, TCM1506B, TCM1512B, TCM1531, TCM1532, TCM1536, and TCM1539 are monolithicintegrated circuit telephone tone-ringer drivers that, when coupled with an appropriate transducer, replace theelectromechanical bell. These devices are designed using BIDFETtechnology for use with either a Piezotransducer or an inexpensive transformer-coupled speaker to produce a pleasing tone composed of a highfrequency (fH) alternating with a low frequency (fL) resulting in a warble tone. Each device is powered andactivated by the telephone line ring voltage, which may vary from 40 Vrms to 150 Vrms at frequencies from15.3 Hz to 68 Hz. |