TEA1114A - NXP

TEA1114A Low voltage versatile telephone transmission

plastic dual in-line package; 16 leads (300 mil) plastic small outline package; 16 leads; body width 3.9 mm bare die; on foil APPLICATIONS TEA1114A • Line powered telephone sets with LCD module • Cordless telephones • Fax machines • Answering machines. GENERAL DESCRIPTION The TEA1114A is a bipolar integrated circuit that performs all speech and line interf.

Features

• Low DC line voltage; operates down to 1.45 V (excluding voltage drop over external polarity guard)
• Line voltage regulator with adjustable DC voltage
• 3.3 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 receive output.
• Receive stage with:
  – Receive amplifier with asymmetrical output
  – Earpiece amplifier with adjustable gain (and gain boost facility) for all types of earpieces.
• MUTE input for pu.