TEA1114A

INTEGRATED CIRCUITS DATA SHEET TEA1114A Low voltage telephone transmission circuit with dialler interface and regulated strong supply Product specification Supersedes data of 1999 Sep 14 File under Integrated Circuits, IC03 2000 Mar 21 Philips Semiconductors Product specification Low voltage telephone transmission circuit with dialler interface and regulated strong supply 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 pulse or DTMF dialling AGC line loss compensation for microphone and receive amplifiers. ORDERING INFORMATION TYPE NUMBER TEA1114A TEA1114AT TEA1114AUH PACKAGE NAME DIP16 SO16 − DESCRIPTION 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 tha...