Datasheet Summary
TECHNICAL DATA
DTMF RECEIVER
High-Performance Silicon-Gate CMOS
The IL9270N/D is a plete 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 ponent count is minimized by on-chip provision of a differential input amplifier, clock-oscillator and latched 3-state bus interface.
- plete receiver in an 18-pin package.
- Excellent performance.
- CMOS, single 5 volt operation.
- Minimum board area.
- Central office...