HT9200A/B DTMF Generators Features Operating voltage: 2.0V~5.5V Serial mode for theHT9200ASerial/parallel mode for the HT9200B Low standby current Low total harmonic distortion 3.58MHz crystal or ceramic resonatorHT9200A: 8-pin DIP/SOP package HT9200B: 14-pin SOP package General Description TheHT9200A/B tone generators are designed for mC interfaces. They can be instructed by a mC to generate 16 dual tones and 8 single tones from the DTMF pin. TheHT9200Aprovides 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. Selection Table Function Part No.HT9200AHT9200B Operating Voltage 2V~5.5V 2V~5.5V OSC Frequency 3.58MHz 3.58MHz Interface Serial Serial/Parallel Package