CD22859 generator equivalent, monolithic silicon cos/mos dual-tone multifrequency tone generator.
* Mute Drivers On-Chip
* Device Power can Either be Regulated DC or Telephone Loop Current
* Use of an Inexpensive 3.579545MHz TV Crystal Provides High Accura.
* For Use In Dual-tone Telephone Dialing Systems
Pinout
CD22859 (PDIP) TOP VIEW
VDD 1 TX 2 C1 3 C2 4 C3 5 VSS 6 OS.
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