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CD22202 Datasheet 5V Low Power DTMF Receiver

Manufacturer: Intersil (now Renesas)

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General 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.

Overview

November 2002 UC T NT P RO D E T E CEME L OBSO DED REPLA enter at EN rt C /tsc COMM S uppo NO RE r Technical .intersil.

Key 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 in Either 4-Bit Hexadecimal Code or Binary Coded 2-of-8.
  • Synchronous or Handshake Interface.
  • Three-State Outputs.
  • Excellent Latch-Up Immunity.

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