SC9270D DTMF Receiver

SC9270D is complete DTMF receiver integrating both the bandsplit filter and digital decoder functions.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.

Featues:

• Complete receiver an 18-pin package
  
• Excellent performance
  
• CMOS, single 5 volt operation
  
• Widely operating voltage: ~ 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