HM9270C Datasheet (ELAN Microelectronics Corp)

HM9270C, DTMF RECEIVER

The HM 9270C/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 dial-tone rejection.

Digital counting techniques are employed in the decoder to detect and decode

HM9270C Features

* Complete receiver in an 18-pin package. Excellent performance. CMOS, single 5 volt operation. Minimum board area. Central office quality. Low power consumption. Power-Down mode (HM9270D only). Inhibit-mode (HM9270D only)