SC9270D

SC9270 DTMF DEMODULATOR WITH FILTER AND DIGITAL DECODER 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 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 amplifier, clock-oscillator and latched 3-state bus interface. SOP-20-375-1.27 FEATURES DIP-18-300-2.54 * 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 ORDERING INFORMATION Device SC9270C SC927...