HT9200A Datasheet, PDF (1/8 Pages) Holtek Semiconductor Inc – DTMF Generators

HT9200A/B
DTMF Generators
Features
• _{Operating voltage: 2.0V~5.5V}
• _{Serial mode for the HT9200A}
• _{Serial/parallel mode for the HT9200B}
General Description
The HT9200A/B tone generators are designed
for µC interfaces. They can be instructed by a
µC to generate 16 dual tones and 8 single tones
from the DTMF pin. The HT9200A provides a
serial mode whereas the HT9200B contains a
Selection Table
• _{Low standby current}
• _{Low total harmonic distortion}
• _{3.58MHz crystal or ceramic resonator}
selectable serial/parallel mode interface for
various applications such as security systems,
home automation, remote control through tele-
phone lines, communication systems, etc.
Block Diagram
1
21st Aug ’98