Monolithic Silicon COS/MOS Dual-Tone Multifrequency Tone Generator

The CD22859 is a CMOS dual-tone multifrequency (DTMF) tone generator for use in dual-tone telephone dialing systems. The device can easily be interfaced to a standard push-button telephone keyboard to provide enabling operation directly with the telephone lines. The CD22859 generates standard D

Monolithic Silicon COS/MOS Dual-Tone Multifrequency Tone Generator

The CD22859 is a CMOS dual-tone multifrequency (DTMF) tone generator for use in dual-tone telephone dialing systems. The device can easily be interfaced to a standard push-button telephone keyboard to provide enabling operation directly with the telephone lines.\nThe CD22859 generates standard DTMF • Mute Drivers On-Chip\n• Device Power can Either be Regulated DC or Telephone Loop Current\n• Use of an Inexpensive 3.579545MHz TV Crystal Provides High Accuracy and Stability for all FrequenciesApplications\n• For Use In Dual-tone Telephone Dialing Systems ;

Monolithic Silicon COS/MOS Dual-Tone Multifrequency Tone Generator

The CD22859 is a CMOS dual-tone multifrequency (DTMF) tone generator for use in dual-tone telephone dialing systems. The device can easily be interfaced to a standard push-button telephone keyboard to provide enabling operation directly with the telephone lines. The CD22859 generates standard D