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CD22204 - 5V Low Power Subscriber DTMF Receiver

General Description

only.

Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice.

Key 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.
  • Output in 4-Bit Hexadecimal Code.
  • Excellent Latch-Up Immunity Pinouts CD22204 (PDIP) TOP VIEW D2 1 D1 2 EN 3 VDD 4 NC 5 14 D4 13 D8 12 DV 11 ATB 10 XIN 9 XOUT 8 VSS Ordering Information PART.

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Other Datasheets by Intersil (now Renesas)

Part Number Description
CD22202 5V Low Power DTMF Receiver
CD22203 5V Low Power DTMF Receiver
CD22100 CMOS 4 x 4 Crosspoint Switch with Control Memory High-Voltage Type (20V Rating)
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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 crystal connected CD22204 receiver to drive the time bases of up to 10 additional receivers. This is a monolithic integrated circuit fabricated with low power, complementary symmetry CMOS processing. It only requires a single power supply.