Speech/handsfree. TEA1098TV Datasheet

TEA1098TV Speech/handsfree. Datasheet pdf. Equivalent

Part TEA1098TV
Description Speech/handsfree
Feature INTEGRATED CIRCUITS DATA SHEET TEA1098 Speech and handsfree IC Product specification Supersedes dat.
Manufacture NXP
Datasheet
Download TEA1098TV Datasheet

INTEGRATED CIRCUITS DATA SHEET TEA1098 Speech and handsfre TEA1098TV Datasheet
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TEA1098TV
INTEGRATED CIRCUITS
DATA SHEET
TEA1098
Speech and handsfree IC
Product specification
Supersedes data of 1999 May 20
File under Integrated Circuits, IC03
1999 Oct 14



TEA1098TV
Philips Semiconductors
Speech and handsfree IC
Product specification
TEA1098
FEATURES
Line interface
Low DC line voltage
Voltage regulator with adjustable DC voltage
Symmetrical high impedance inputs (70 k) for
dynamic, magnetic or electret microphones
DTMF input with confidence tone on earphone and/or
loudspeaker
Receive amplifier for dynamic, magnetic or
piezo-electric earpieces (with externally adjustable gain)
Automatic Gain Control (AGC) for true line loss
compensation.
Supplies
Provides a strong 3.35 V regulated supply for
microcontrollers or diallers
Provides filtered power supply, optimized according to
line current
Filtered 2.0 V power supply output for electret
microphone
PD logic input for power-down.
Handsfree
Asymmetrical high input impedance for electret
microphone
Loudspeaker amplifier with single-ended rail-to-rail
output and externally adjustable gain
Dynamic limiter on loudspeaker amplifier to prevent
distortion
Logarithmic volume control on loudspeaker amplifier via
linear potentiometer
Duplex controller consisting of:
– Signal and noise envelope monitors for both
channels (with adjustable sensitivities and timing)
– Decision logic (with adjustable switch-over and Idle
mode timing)
– Voice switch control (with adjustable switching range
and constant sum of gain during switching).
APPLICATIONS
Line powered telephone sets.
GENERAL DESCRIPTION
The TEA1098 is an analog bipolar circuit dedicated to
telephony applications. It includes a line interface, handset
(HS) microphone and earpiece amplifiers, handsfree (HF)
microphone and loudspeaker amplifiers and a duplex
controller with signal and noise monitors on both channels.
This IC provides a 3.35 V supply for a microcontroller or
dialler and a 2.0 V filtered voltage supply for an electret
microphone.
ORDERING INFORMATION
TYPE
NUMBER
TEA1098TV
TEA1098H
NAME
VSO40
QFP44
TEA1098UH
PACKAGE
DESCRIPTION
plastic very small outline package; 40 leads
plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10 × 10 × 1.75 mm
bare die; on foil
VERSION
SOT158-1
SOT307-2
1999 Oct 14
2





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