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

技術相關信息 Data Sheet 封裝信息 18-pin DIP 封裝 18-pin SOP 封裝 問答集 應用范例 其它相關信息 相關產品信息   盛群推出新一代雙音多頻(DTMF)信號接收器 -- HT9172   Selection Guide 產品型號索引