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U3761MB-T - Universal Telephone IC

General Description

Atmel’s low-voltage telephone circuit U3761MB-T performs all the speech and line interface functions required in an electronic telephone set, a tone ringer, a pulse and DTMF dialing with redial, notice function, and 13 memories.

Operation below 15 mA is possible with reduced performance.

Rev.

Key Features

  • Speech Circuit.
  • Adjustable DC Characteristic Symmetrical Input of Microphone Amplifier Receiving Amplifier for Dynamic or Piezo-electric Earpieces Automatic Line-loss Compensation Dialer.
  • DTMF/Pulse Switchable Pulse Dialing 66/33 or 60/40 or DTMF Dialing Selectable by Pin Selectable Flashing Duration by Key Pad Pause Fu.

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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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www.DataSheet4U.com Features Speech Circuit • • • • Adjustable DC Characteristic Symmetrical Input of Microphone Amplifier Receiving Amplifier for Dynamic or Piezo-electric Earpieces Automatic Line-loss Compensation Dialer • • • • • • • • • • • • • • DTMF/Pulse Switchable Pulse Dialing 66/33 or 60/40 or DTMF Dialing Selectable by Pin Selectable Flashing Duration by Key Pad Pause Function Optical Indication of Temporary DTMF Mode Keytone for Pulse Dialing Last Number Redial up to 32 Digits Three by 17 Digits Direct (One-touch) Memory Ten by 17 Digits Indirect (Two-touch) Memory Notice Function up to 32 Digits Standard Low-cost Crystal 3.