Datasheet Summary
Semiconductor
T UCT ROD ACEMEN 47 P E 7 T L OLE REP 00-442-7 OBS ENDED 8 M ns 1 . pplicatio @harris E R NOSheet tapp ral A Data February 1999 Cent ail: cen l l a m C e or
File Number
Monolithic Silicon COS/MOS Dual-Tone Multifrequency Tone Generator
[ /Title The CD22859 is a CMOS dual-tone multifrequency (DTMF) (CD22 tone generator for use in dual-tone telephone dialing systems. The device can easily be interfaced to a standard 859) push-button telephone keyboard to provide enabling /Suboperation directly with the telephone lines. ject (Monol The CD22859 generates standard DTMF sinusoidal dialing tones from an on-chip reference crystal oscillator. The ithic...
