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TECHNICAL DATA
IN9270
DTMF RECEIVER
High-Performance Silicon-Gate CMOS
The IN9270 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. • Complete receiver in an 18-pin package. • Excellent performance. • CMOS, single 5 volt operation. • Minimum board area. • Central office quality. • Low power consumption.
IN9270 Datasheet
