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HT9172, HT9200, HT9200A

Table of contents:
Info of HT9172
Info of HT9200
Info of HT9200A

HT9172, HT9200, HT9200A Selling Leads, Datasheet

MFG:HOLTEK Package Cooled:SOP D/C:HOLTEK

HT9172, HT9200, HT9200A Datasheet download

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Part Number: HT9172

MFG: HOLTEK

Package Cooled: SOP

D/C: HOLTEK

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HT9172 General Description

The HT9172 is a Dual Tone Multi Frequency (DTMF) receiver device which includes an integrated digital decoder and band split filter functions as well as power-down and inhibit mode operations. The device uses digital counting techniques to detect and decode the full range of 16 DTMF tone pairs into a 4-bit code output. Highly accurate switched capacitor filters are utilised to divide the DTMF dual tone frequencies into low and high group signals. An integrated dial tone rejection circuit is provided to eliminate the need for pre-filtering.

HT9172 Maximum Ratings

Supply Voltage .............................V_SS-0.3V to V_SS+6V
Storage Temperature ............................-50 to 125
Input Voltage.............................V_SS-0.3V to V_DD+0.3V
Operating Temperature...........................-40 to 85

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.

HT9172 Features

· Operating voltage: 2.5V~5.5V
· Minimal external component requirements
· No external filter required
· Low standby current in power down mode)
· Excellent performance
· Tristate data output for MCU interface
· 3.58MHz crystal or ceramic resonator oscillator
· 1633Hz can be inhibited by the INH pin
· 18-pin DIP/SOP packaging

HT9172 Connection Diagram

HT9200A General Description

The HT9200A/B 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.

HT9200A Maximum Ratings

Supply Voltage .................................0.3V to 6V
Input Voltage.................... VSS0.3 to VDD+0.3V
Storage Temperature................. 50 to 125
Operating Temperature............... 20 to 75

*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.

HT9200A 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

HT9200A Connection Diagram

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