DESCRIPTION

The SC9270C/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 all 16 DTMF tone-pairs into a 4-bit code. External component count is minimized by on-chip provision of a differential input amplifier, clock-oscillator and latched 3-state bus interface.

FEATURES

* Complete receiver in an 18-pin package

* Excellent performance

* CMOS, single 5 volt operation,

* Widely operating voltage: 1.2V ~ 5.25V

* Minimum board area

* Central office quality

* Low power consumption

* Power-Down mode (SC9270D only)

* Inhibit-mode (SC9270D only)

APPLICATIONS

* Paging systems

* Repeater systems / Mobile radio

* Credit card systems

* Remote control

* Personal computers