Philips Semiconductors
Product specification
Low voltage versatile telephone
transmission circuit with dialler interface
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 kΩ) for
dynamic, magnetic or piezo-electric microphones
•
Asymmetrical high impedance input (32 kΩ) 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.
GENERAL DESCRIPTION
APPLICATION
TEA1110A
•
Line powered telephone sets, cordless telephones, fax
machines, answering machines.
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
I
line
= 15 mA; V
EE
= 0 V; R
SLPE
= 20
Ω;
AGC pin connected to V
EE
; Z
line
= 600
Ω;
f = 1 kHz; T
amb
= 25
°C;
unless otherwise specified.
SYMBOL
I
line
V
LN
I
CC
V
CC
G
vtrx
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
∆G
vtrx
gain control range for microphone and
receiving amplifiers with respect to
I
line
= 15 mA
gain reduction for microphone and
receiving amplifiers
V
MIC
= 4 mV (RMS)
V
IR
= 4 mV (RMS)
I
line
= 85 mA
−
19
−
43.7
−
5.9
−
33
−
dB
dB
dB
V
CC
= 2.9 V
I
P
= 0 mA
CONDITIONS
normal operation
MIN.
11
3.35
−
−
TYP.
−
−
3.65
1.1
2.9
MAX.
140
11
3.95
1.4
−
UNIT
mA
mA
V
mA
V
with reduced performance 1
∆G
vtrxm
MUTE = LOW
−
80
−
dB
ORDERING INFORMATION
TYPE
NUMBER
TEA1110A
TEA1110AT
PACKAGE
NAME
DIP14
SO14
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
PHILIPS [ NXP SEMICONDUCTORS ]
