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CD22203

Part Number	CD22203
Manufacturer	Intersil Corporation
Description	5V Low Power DTMF Receiver
Published	Mar 23, 2005
Detailed Description	DTMF Receivers/Generators CD22202, CD22203 January 1997 5V Low Power DTMF Receiver Description The CD22202 and CD22203...
Datasheet	CD22203 PDF File

Overview

DTMF Receivers/Generators CD22202, CD22203 January 1997 5V Low Power DTMF Receiver Description 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 bias resistor.
Extremely high system density is possible through the use of the clock output of a crystal connected CD22202/CD22203 receiver to drive the time bases of additional receivers.
This is a monolithic integrated circuit fabricated with low-power, complementary symmetry CMOS processing.
It only requires a single low tolerance power supply.
The CD22202 and CD22203 employ state-of-the-art circuit technology to combine the digital and analog functions on the same CMOS chip using a standard digital semiconductor process.
The analog input is preprocessed by 60Hz reject and band splitting ﬁlter...

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