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MFG:HOLTEK D/C:08+
Part Number: HT9172
MFG: HOLTEK
D/C: 08+
Description: The HT9172 is a Dual Tone Multi Frequency (DTMF) receiver device which includes an integrated digital ...
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HT9172
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DataSheet
General Description
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 .............................VSS-0.3V to VSS+6V
Storage Temperature ............................-50 to 125
Input Voltage.............................VSS-0.3V to VDD+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
· 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
HT9011
PDF/DataSheet Download
- Datasheet: HT9011
- File Size: 100623 KB
- Manufacturer: HOLTEK [Holtek Semiconductor Inc]
- Click here to Download
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HT9172 Relative Products
HT9170D
The HT9170B/HT9170D are Dual Tone Multi Frequency (DTMF) receivers integrated with digital decoder and bandsplit filter functions as well as power-down mode and inhibit mode operations. Such devices use digital counting techniques to detect and decode all th...
HT9170B
The HT9170B/D are Dual Tone Multi Frequency (DTMF) receivers integrated with digital decoder and bandsplit filter functions as well as power-down mode and inhibit mode operations. Such devices use digital counting techniques to detect and decode all the 16 D...
HT9170
The HT9170 series are Dual Tone Multi Frequency (DTMF) receivers integrated with digital decoder and bandsplit filter functions. The HT9170B and HT9170D types supply power-down mode and inhibit mode operations. All types of the series use digital counting te...
HT9033
The HT9033 is a CPE Alerting Signal (CAS) tone receiver integrated with digital filter/decoder and analog front end circuit.It using analog filter techniques to achieve very high precision detection for the present of CAS tone. HT9033 is ideal for receiving...
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