IL9270 Datasheet - IK Semiconductor

IL9270 DTMF Receiver

NAME PIN ESt 16 GS IC IN+ INC1 C2 Q1-Q4 StD 3 5,6 1 2 7 8.

TECHNICAL DATA DTMF RECEIVER High-Performance Silicon-Gate CMOS IL9270 The IL9270N/D is a complete 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. External component count is minimized by on-chip provision of a differential input amp.

IL9270_IKSemiconductor.pdf