CD22204 - 5V Low Power Subscriber DTMF Receiver
only.
Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice.
Accordingly, the r
CD22204 Data Sheet February 1999 File Number 1696.4 5V Low Power Subscriber DTMF Receiver The CD22204 complete dual tone multiple frequency (DTMF) receiver detects 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 bias resistor.
Extremely high system density is possible through the use of the Alternate Time Base (ATB) output of a cr
CD22204 Features
* No Front End Band Splitting Filters Required
* Single Low Tolerance 5V Supply
* Three-State Outputs for Microprocessor Based Systems
* Detects all 16 Standard DTMF Digits
* Uses Inexpensive 3.579545MHz Crystal
* Excellent Speech Immunity
* Ou
