Texas Instruments TCM1501B
The TCM1501B, TCM1506B, TCM1512B, TCM1531, TCM1532, TCM1536, and TCM1539 are monolithic integrated circuit telephone tone-ringer drivers that, when coupled with an appropriate transducer, replace the electromechanical bell. These devices are designed using BIDFET technology for use with either a Piezo transducer or an inexpensive transformer-coupled speaker to produce a pleasing tone composed of a high frequency (fH) alternating with a low frequency (fL) resulting in a warble tone. Each device is powered and activated by the telephone line ring voltage, which may vary from 40 Vrms to 150 Vrms at frequencies from 15.3 Hz to 68 Hz.
Texas Instruments
