The HT9200A tone generators are designed for MCU interfaces. They can be instructed by a MCU to generate 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 interface for various applications such as security systems, home automation, remote control through telephone lines, communication systems, etc.

Operating voltage: 2.5V~5.5V
Serial mode for the HT9200A
Low standby current
Low total harmonic distortion
3.58MHz crystal or ceramic resonator
HT9200A: 8-pin DIP/SOP package