5v low power dtmf receiver.
* Central Office Quality
* No Front End Band Splitting Filters Required
* Single, Low Tolerance, 5V Supply
* Detects Either 12 or 16 Standard DTMF Digits .
and is not normally used in telephone dialing.
IN1633 When tied high, this pin inhibits detection of tone pairs contain.
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 “col.
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