CD22203 - 5V Low Power DTMF Receiver
The CD22202 and CD22203 complete dual-tone multiple frequency (DTMF) receivers detect a selectable group of 12 or 16 standard digits.
No front-end pre-filtering is needed.
The only externally required components are an inexpensive 3.579545MHz TV “colorburst’’ crystal (for frequency reference) and a b
CD22203 Features
* Central Office Quality
* No Front End Band Splitting Filters Required
* Single, Low Tolerance, 5V Supply
* Detects Either 12 or 16 Standard DTMF Digits
* Uses Inexpensive 3.579545MHz Crystal for Reference
* Excellent Speech Immunity
* Output i
