telephone transmission. TEA1112 Datasheet

TEA1112 transmission. Datasheet pdf. Equivalent


Part TEA1112
Description Low voltage versatile telephone transmission
Feature INTEGRATED CIRCUITS DATA SHEET TEA1112; TEA1112A Low voltage versatile telephone transmission circ.
Manufacture NXP
Datasheet
Download TEA1112 Datasheet


INTEGRATED CIRCUITS DATA SHEET TEA1112; TEA1112A Low volta TEA1112 Datasheet
INTEGRATED CIRCUITS DATA SHEET TEA1112; TEA1112A Low volta TEA1112A Datasheet
Recommendation Recommendation Datasheet TEA1112 Datasheet




TEA1112
INTEGRATED CIRCUITS
DATA SHEET
TEA1112; TEA1112A
Low voltage versatile telephone
transmission circuits with dialler
interface
Product specification
Supersedes data of 1996 Feb 16
File under Integrated Circuits, IC03
1997 Mar 26



TEA1112
Philips Semiconductors
Low voltage versatile telephone
transmission circuits with dialler interface
Product specification
TEA1112; TEA1112A
FEATURES
Low DC line voltage; operates down to 1.6 V (excluding
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 (MUTE for
TEA1112 and MUTE for TEA1112A)
Receiving amplifier for dynamic, magnetic or
piezo-electric earpieces
AGC line loss compensation for microphone and
earpiece amplifiers
LED on-hook/off-hook status indication
Microphone mute function (MMUTE for TEA1112 and
MMUTE for TEA1112A).
APPLICATION
Line powered telephone sets, cordless telephones, fax
machines and answering machines.
GENERAL DESCRIPTION
The TEA1112; TEA1112A are bipolar integrated circuits
that perform all speech and line interface functions
required in fully electronic telephone sets. They perform
electronic switching between speech and dialling. The ICs
operate at a line voltage down to 1.6 V DC (with reduced
performance) to facilitate the use of telephone sets
connected in parallel.
A current (proportional to the line current and internally
limited to a typical value of 19.5 mA) is available to drive
an LED which indicates the on-hook/off-hook status.
The microphone amplifier can be disabled during speech
condition by means of a microphone mute function.
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
ILED(max)
VLN
ICC
VCC
Gvtrx
Gvtrx
Gvtxm
PARAMETER
line current operating range
maximum supply current available
DC line voltage
internal current consumption
supply voltage for peripherals
typical voltage gain range
microphone amplifier
receiving amplifier
gain control range for microphone and
receiving amplifiers with respect to
Iline = 15 mA
microphone amplifier gain reduction
CONDITIONS
normal operation
with reduced performance
Iline = 18 mA
Iline > 76 mA
VCC = 2.9 V
Ip = 0 mA
MIN.
11
1
3.35
TYP.
0.5
19.5
3.65
1.15
2.9
MAX.
140
11
3.95
1.4
UNIT
mA
mA
mA
mA
V
mA
V
VMIC = 2 mV (RMS)
VIR = 6 mV (RMS)
Iline = 85 mA
38.8
19.2
5.8
51.8 dB
31.2 dB
dB
80 dB
1997 Mar 26
2







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