描述
廠牌: HOLTEK
產地: 台灣
封裝樣式: 18-PIN SOP / 包裝: 管裝
General 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 imple-mented 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.
HOLTEK HT9170D(DTMF Receiver)
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