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INTEGRATED CIRCUITS
DATA SHEET
TEA1110A
Low voltage versatile telephone
transmission circuit with dialler
interface
Product specification
Supersedes data of 1996 Nov 26
File under Integrated Circuits, IC03
1997 Apr 22

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Philips Semiconductors
Low voltage versatile telephone
transmission circuit with dialler interface
Product specification
TEA1110A
FEATURES
Low DC line voltage; operates down to 1.6 V (excluding
voltage drop over external polarity guard)
Voltage regulator with adjustable DC voltage
Provides a supply for external circuits
Symmetrical high impedance inputs (64 k) for
dynamic, magnetic or piezo-electric microphones
Asymmetrical high impedance input (32 k) for electret
microphones
DTMF input with confidence tone
MUTE input for pulse or DTMF dialling
Receiving amplifier for dynamic, magnetic or
piezo-electric earpieces
AGC line loss compensation for microphone and
earpiece amplifiers.
APPLICATION
Line powered telephone sets, cordless telephones, fax
machines, answering machines.
GENERAL DESCRIPTION
The TEA1110A 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 1.6 V DC (with reduced performance) to
facilitate the use of telephone sets connected in parallel.
All statements and values refer to all versions unless
otherwise specified.
QUICK REFERENCE DATA
Iline = 15 mA; VEE = 0 V; RSLPE = 20 ; AGC pin connected to VEE; Zline = 600 ; f = 1 kHz; Tamb = 25 °C;
unless otherwise specified.
SYMBOL
Iline
VLN
ICC
VCC
Gvtrx
Gvtrx
Gvtrxm
PARAMETER
line current operating range
DC line voltage
internal current consumption
supply voltage for peripherals
typical voltage gain
microphone amplifier (not adjustable)
receiving amplifier range
gain control range for microphone and
receiving amplifiers with respect to
Iline = 15 mA
gain reduction for microphone and
receiving amplifiers
CONDITIONS
MIN.
normal operation
11
with reduced performance 1
3.35
VCC = 2.9 V
IP = 0 mA
VMIC = 4 mV (RMS)
VIR = 4 mV (RMS)
Iline = 85 mA
19
MUTE = LOW
TYP.
3.65
1.1
2.9
43.7
5.9
80
MAX. UNIT
140 mA
11 mA
3.95 V
1.4 mA
V
dB
33 dB
dB
dB
ORDERING INFORMATION
TYPE
NUMBER
TEA1110A
TEA1110AT
NAME
DIP14
SO14
PACKAGE
DESCRIPTION
plastic dual in-line package; 14 leads (300 mil)
plastic small outline package; 14 leads; body width 3.9 mm
VERSION
SOT27-1
SOT108-1
1997 Apr 22
2

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Philips Semiconductors
Low voltage versatile telephone
transmission circuit with dialler interface
BLOCK DIAGRAM
Product specification
TEA1110A
handbook, full pagewidth
IR 7
VI
DTMF
VI
5
ATT.
VI
MIC+ 10
9
MIC
VI
GAR
13
QR MUTE
12 6
CURRENT
REFERENCE
14 VCC
1 LN
3 REG
11
VEE
AGC
CIRCUIT
LOW VOLTAGE
CIRCUIT
TEA1110A(T)
8
AGC
2
SLPE
MGG736
1997 Apr 22
Fig.1 Block diagram.
3