The HT9200A/B tone generators are designed for MCU interfaces. They can be instructed by a MCU to gener
ate 16 dual tones and 8 single tones from the DTMF pin. The HT9200A provides a serial mode whereas the
HT9200B contains a selectable serial/parallel mode in terface for various applications such as security systems, home automation, remote control through telephone lines, communication systems, etc.