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TEA1114A View Datasheet(PDF) - Philips Electronics

Part Name
Description
Manufacturer
TEA1114A Datasheet PDF : 28 Pages
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Philips Semiconductors
Low voltage telephone transmission circuit with
dialler interface and regulated strong supply
Product specification
TEA1114A
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.
APPLICATIONS
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 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 1.45 V DC (with reduced performance) to
facilitate the use of telephone sets connected in parallel.
When the line current is high enough, a fixed amount of
current is derived from the LN pin in order to create a
strong supply point at pin VDD. The voltage at pin VDD is
regulated to 3.3 V to supply peripherals such as dialler,
LCD module and microcontroller.
ORDERING INFORMATION
TYPE
NUMBER
TEA1114A
TEA1114AT
TEA1114AUH
NAME
DIP16
SO16
PACKAGE
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
VERSION
SOT38-4
SOT109-1
2000 Mar 21
2
 

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