HT9200A integrated transistor , integrated circute New & Original DTMF Generators

HT9200A/B DTMF Generators

Features

• Operating voltage: 2.0V~5.5V

• Serial mode for the HT9200A

• Serial/parallel mode for the HT9200B

• Low standby current

• Low total harmonic distortion

• 3.58MHz crystal or ceramic resonator

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 selectable serial/parallel mode interface for various applications such as security systems, home automation, remote control through telephone lines, communication systems, etc.

Absolute Maximum Ratings*

Supply Voltage .................................–0.3V to 6V

Storage Temperature................. –50°C to 125°C

Input Voltage.................... VSS–0.3 to VDD+0.3V

Operating Temperature............... –20°C to 75°C

*Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings” may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability

Block Diagram

Pin Assignment

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