Hot-selling and scarce HT9170D DTMF Receiver SOP18 spot stock

Product Descriptions

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 HT9170 series 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 employed to divide tone (DTMF) signals into low and high group signals. A built-in dial tone rejection circuit is provided to eliminate the need for pre-filtering.​

Product Features

 Operating voltage: 2.5V~5.5V 

 Minimal external components 

 No external filter is required

 Low standby current (on power down mode) 

 Excellent performance

 Tristate data output for 

 C interface 

 3.58MHz crystal or ceramic resonator 

 1633Hz can be inhibited by the INH pin 

 HT9170B: 18-pin DIP package 

HT9170D: 18-pin SOP package

Product Photos

For more product information, please download the PDF