CD22202 INTERSIL | Alldatasheet

Document overview

  • Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
  • PDF pages: 6

Technical content

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

Ordering Information

TEMP. RANGE (oC) PACKAGE PKG. NO. CD22202E 0 to 70 18 Ld PDIP E18.3 CD22203E 0 to 70 18 Ld PDIP E18.3 File Number 1695.3 DTMF Receivers/Generators CD22202, CD22203 5V Low Power DTMF Receiver CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207| Copyright © Intersil Corporation 1999

CD22202, CD22203 Absolute Maximum Ratings Thermal Information Power Dissipation Input Voltage Range NOTE: Unused inputs must be connected to VDD or VSS as appropriate. Operating Conditions CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Electrical Specifications0oC ≤ TA ≤ +70oC, VDD = 5V±10% PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Frequency Detect Bandwidth ±(1.5 + 2Hz) ±2.3 ±3.5 % of f O Amplitude for Detection Each Tone -32 - -2 dBm Referenced to 600 Ω Minimum Acceptable Twist -10 - +10 dB 60Hz Tolerance - - 0.8 V RMS Dial Tone Tolerance “Precise” Dial Tone - - 0 dB Referenced to Lower Amplitude Tone Talk Off MITEL Tape #CM7291 - 2 - Hits Digital Outputs (except XOUT) “0” Level, 400µA Load 0 - 0.5 V “1” Level, 200µA Load V DD -0.5 - V DD V Digital Inputs “0” Level 0 - 0.3V DD V “1” Level 0.7V DD -V DD V Supply Current T A = +25oC - 10 16 mA Noise Tolerance MITEL Tape #CM7291 (Note 1) - - -12 dB Referenced to Lowest Amplitude Tone Input Impedance V DD ≥ VIN ≥ (VDD -10) 100k Ω //15pF 300k Ω - NOTE: 1. Bandwidth limited (3kHz) Gaussian noise. Twist High Tone

NOTE: Pin 6: Early detect output on CD22203 only.

9 BS1

age. Proper input coupling is illustrated below. FIGURE 1. ANALOG IN monics that are at least 20dB below the fundamental. a low cost television “color-burst” (3.579545MHz) crystal. ATB pins to the ATB output of a crystal connected device.

All Intersil semiconductor products are manufactured, assembled and tested underISO9000 quality systems certification. may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. FIGURE 6. CD22203 DTMF RECEIVER WITH GUARD TIME CIRCUIT TO PROVIDE EXCEPTIONAL TALK-OFF PERFORMANCE exceed the absolute maximum rating. nals should never be greater than VDD nor less than VSS . VSS , whichever is appropriate. devices by exceeding the maximum device dissipation.