IL9270 Overview
TECHNICAL DATA DTMF RECEIVER High-Performance Silicon-Gate CMOS IL9270 The IL9270N/D is a plete DTMF receiver integrating both the bandsplit filter and digital decoder functions. The filter section uses switched capacitor techniques for high- and low-group filters and dialtone rejection. Digital counting techniques are employed in the decoder to detect and decode all 16 DTMF tone-pairs into a 4-bit code.