tea1114auh NXP Semiconductors, tea1114auh Datasheet - Page 2

• Manufacturer Part Number: tea1114auh
• Description: Low Voltage Telephone Transmission Circuit With Dialler Interface And Regulated Strong Supply
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
ORDERING INFORMATION
2000 Mar 21
TEA1114A
TEA1114AT
TEA1114AUH
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
– DTMF amplifier with confidence tone on receive
Receive stage with:
– Receive amplifier with asymmetrical output
– Earpiece amplifier with adjustable gain (and gain
MUTE input for pulse or DTMF dialling
AGC line loss compensation for microphone and receive
amplifiers.
Low voltage telephone transmission circuit with
dialler interface and regulated strong supply
NUMBER
impedance inputs
output.
boost facility) for all types of earpieces.
TYPE
NAME
DIP16
SO16
plastic dual in-line package; 16 leads (300 mil)
plastic small outline package; 16 leads; body width 3.9 mm
bare die; on foil
2
DESCRIPTION
APPLICATIONS
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 V
regulated to 3.3 V to supply peripherals such as dialler,
LCD module and microcontroller.
PACKAGE
Line powered telephone sets with LCD module
Cordless telephones
Fax machines
Answering machines.
DD
. The voltage at pin V
Product specification
TEA1114A
SOT109-1
VERSION
SOT38-4
DD
is