HT9170B中文资料DTMF Receiver数据手册Holtek规格书

描述 Description

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 DTMF tone pairs into a 4-bit code output.

Highly accurate switched capacitor filters are implemented to divide tone signals into low and high group signals. A built-in dial tone rejection circuit is provided to eliminate the need for pre-filtering.

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特性 Features

• Operating voltage: 2.5V~5.5V
• No external filter is required
• Excellent performance
• 3.58MHz crystal or ceramic resonator
• HT9170B: 18-pin DIP package
HT9170D: 18-pin SOP package