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产品名称:
HT9172
产品型号:
HT9172
产品展商:
上海集驰电子有限公司
简单介绍
HT9172 -- DTMF Receiver
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. A
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HT9172
的详细介绍 |
 | HT9172 -- DTMF Receiver 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. Features - HT9172 Operating voltage: 2.5V~5.5V
- HT9172 Minimal external components
- HT9172 No external filter is required
- HT9172 Low standby current in power down mode
- HT9172 Excellent performance
- HT9172 Tristate data output for MCU interface
- HT9172 3.58MHz crystal or ceramic resonator
- HT9172 1633Hz can be inhibited by the INH pin
- HT9172 18-pin DIP/SOP package
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