The HT9170D is a 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.

1. Each purchasing unit includes 5 pieces of IC.
2. The product image is for showing the product appearance, the pin count shown may not match the product pin count.