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TEA1111A Datasheet Earpiece Volume Controller

Manufacturer: NXP Semiconductors

Overview: INTEGRATED CIRCUITS DATA SHEET TEA1111A Speech circuit with dialler interface, regulated supply and earpiece volume control Product specification Supersedes data of 1999 Sep 28 File under Integrated Circuits, IC03 1999.

General Description

The TEA1111A is a bipolar integrated circuit that performs all speech and line interface functions required in fully electronic telephone sets.

It performs electronic switching between speech and dialling.

The IC operates at a line voltage down to 1.5 V DC (with reduced performance) to facilitate the use of telephone sets connected in parallel.

Key Features

  • Low DC line voltage; operates down to 1.5 V (excluding voltage drop across external polarity guard).
  • Line voltage regulator with adjustable DC voltage.
  • 3.25 V regulated strong supply point for peripheral circuits compatible with:.
  • Speech mode.
  • Ringer mode.
  • Trickle mode.
  • Transmit stage with:.
  • Microphone amplifier with symmetrical high impedance inputs.
  • DTMF amplifier with confidence tone on earpiece.
  • Rece.

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TEA1111A Distributor