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TEA1081T View Datasheet(PDF) - Philips Electronics

Part NameDescriptionManufacturer
TEA1081T Supply circuit with power-down for telephone set peripherals Philips
Philips Electronics Philips
TEA1081T Datasheet PDF : 16 Pages
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Philips Semiconductors
Supply circuit with power-down for
telephone set peripherals
Product specification
TEA1081
FEATURES
High input impedance for audio signals
Low DC series resistance
High output current
Large audio signal handling capability
Low distortion
Two modes of operation:
– output voltage that follows the DC line voltage
– regulated output voltage
Power-down input
Low number of external components.
QUICK REFERENCE DATA
SYMBOL
VLN
VO
VLN-O
RS
IO
VLN(rms)
PARAMETER
operating DC line voltage
DC output voltage
voltage drop from line to output
internal series resistance
output current (pin 7)
TEA1081
TEA1081T
AC line voltage (RMS value)
IINT
internal supply current
Tamb
operating ambient temperature
GENERAL DESCRIPTION
The TEA1081 is an integrated circuit for use in
line-powered telephone sets to supply peripheral circuits
for extended dialling and/or loudspeaker facilities.
The IC uses a part of the surplus line current normally
drawn by the voltage regulator of the speech/transmission
circuit. A power-down function isolates the IC from its load
and reduces the input current.
CONDITIONS
IO = 0 mA
VLN = 4 V
VLN = 4 V; IO = 15 mA;
THD = 2%
VLN = 4 V; IO = 0 mA;
PD = LOW; VSP = VO
MIN.
2.5
2.0
25
TYP.
0.5
20
1.5
0.8
MAX. UNIT
12.0 V
10.0 V
V
30
mA
20
mA
V
1.4 mA
+70 °C
ORDERING INFORMATION
TYPE NUMBER
TEA1081
TEA1081T
NAME
DIP8
SO8
PACKAGE
DESCRIPTION
plastic dual in-line package; 8 leads (300 mil)
plastic small outline package; 8 leads; body width 3.9 mm
VERSION
SOT97-1
SOT96-1
September 1994
2
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