UNISONIC TECHNOLOGIES CO., LTD
TEA1110A
LOW VOLTAGE VERSATILE
TELEPHONE TRANSMISSION
CIRCUIT WITH DIALLER
INTERFACE
DESCRIPTION
The UTC
TEA1110A
is a versatile telephone transmission circuit
providing full speech and line interface functions in electronic
telephone sets. This device works at a line voltage which can be as
low as 1.6V DC (with reduced performance) to enable parallel
connection of telephone sets. It also realizes electronic switching
between speeches and dialling.
The UTC
TEA1110A
is ideal for applications, such as line
powered telephone sets, cordless telephones, and fax machines,
answering machines.
LINEAR INTEGRATED CIRCUIT
SOP-14
DIP-14
Lead-free:
TEA1110AL
Halogen-free:TEA1110AG
FEATURES
*
Low DC line voltage; operates down to 1.6V (excluding voltage
drop over external polarity guard)
*
Voltage regulator with adjustable DC voltage
or piezo-electric microphones
*
Asymmetrical high impedance input (32kΩ) for electric
microphones
*
DTMF input with confidence tone
*
Provides a supply for external circuits
*
Symmetrical high impedance inputs (64kΩ) for dynamic, magnetic
earpieces
*
AGC line loss compensation for microphone and earpiece
amplifiers.
*
MUTE
input for pulse or DTMF dialling
*
Receiving amplifier for dynamic, magnetic or piezo-electric
ORDERING INFORMATION
Normal
TEA1110A-D14-T
TEA1110A-S14-R
Ordering Number
Lead Free
TEA1110AL-D14-T
TEA1110AL-S14-R
Halogen Free
TEA1110AG-D14-T
TEA1110AG-S14-R
Package
DIP-14
SOP-14
Packing
Tube
Tape Reel
www.unisonic.com.tw
Copyright © 2007 Unisonic Technologies Co., Ltd
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QW-R108-014,B
TEA1110A
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PAD NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SYMBOL
LN
SLPE
REG
NC
DTMF
MUTE
DESCRIPTION
Positive line terminal
Slope (DC resistance) adjustment
Line voltage regulator decoupling
Not connected
Dual-tone multi-frequency input
Mute input to select speech or dialing mode (active LOW)
Receiving amplifier input
Automatic gain control/line loss compensation
Inverting microphone amplifier input
Non-inverting microphone amplifier input
Negative line terminal
Earpiece amplifier output
Earpiece amplifier gain adjustment
Supply voltage for internal circuit
IR
AGC
MIC-
MIC+
V
EE
QR
GAR
V
CC
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QW-R108-014.B
TEA1110A
ABSOLUTE MAXIMUM RATINGS
LINEAR INTEGRATED CIRCUIT
PARAMETER
SYMBOL
RATINGS
UNIT
Positive Continuous Line Voltage
V
EE
-0.4 ~ 12
V
V
LN
Repetitive Line Voltage During Switch-on or
V
V
EE
-0.4 ~ 13.2
Line Interruption
Maximum Voltage On All Pins
V
N(MAX)
V
EE
-0.4 ~V
CC
+0.4
V
Maximum Line Current (R
SLPE
=20Ω)
I
LINE
140
mA
DIP-14
588
mW
Power Dissipation (Ta=75°C)
P
D
SOP-14
384
mW
Junction Temperature
T
J
125
°C
Ambient Temperature
T
OPR
-25~+75
°C
Storage Temperature
T
STG
-40~+125
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA
PARAMETER
Junction to Ambient
Note: Mounted on epoxy board
DIP-14
SOP-14
SYMBOL
θ
JA
MIN
TYP
MAX
85
130
UNIT
°C/W
°C/W
ELECTRIC CHARACTERISTICS
(Ta=25°C, unless otherwise specified)
(I
LINE
=15mA, V
EE
=0V, R
SLPE
=20Ω, AGC pin connected to V
EE
, Z
LINE
=600Ω,f=1kHz)
PARAMETER
SYMBOL
CONDITIONS
Supplies (pins VLN, VCC, SLPE and REG)
Stabilized Voltage Between LN and SLPE
V
REF
I
LINE
=1mA
I
LINE
=4mA
I
LINE
=15mA
I
LINE
=140mA
R
VA(SLPE-REG)
= 27kΩ
Ta = -25 ~ +75 °C
V
CC
= 2.9 V
I
P
=0mA
I
P
=0.5mA
V
MIC
=4mV (RMS)
f =300~3400 Hz
Ta =-25~+75 °C
I
LINE
=15mA; THD=2%
I
LINE
=4mA, THD=10%
1.4
42.7
MIN
3.1
TYP MAX UNIT
3.35
1.6
2.3
3.65
4.4
±30
1.1
2.9
550
43.7
±0.2
±0.3
80
1.7
0.8
-78.5
1.4
620
44.7
3.6
V
V
V
V
V
V
mV
mA
V
Ω
dB
dB
dB
dB
V
V
dBmp
DC Line Voltage
V
LN
3.35
3.95
6.9
DC line voltage with an external resistor
V
LN(exR)
RVA
DC line voltage variation with
V
LN(T)
temperature referred to 25 °C
internal current consumption
I
CC
Supply voltage for peripherals
V
CC
Equivalent supply voltage resistance
R
CC
int
Microphone amplifier (pins MIC+ and MIC-)
Voltage gain from MIC+/MIC- to LN
G
VTX
Gain variation with frequency referred to
G
VTX(F)
1kHz
Gain variation with temperature referred
G
VTX(T)
to 25°C
Common mode rejection ratio
CMRR
Maximum sending signal
V
LN(MAX)
(RMS value)
(rms)
Noise output voltage at pin LN, pins
V
NOTX
MIC+/MIC- shorted through 200Ω
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QW-R108-014.B
TEA1110A
ELECTRIC CHARACTERISTICS(Cont.)
LINEAR INTEGRATED CIRCUIT
PARAMETER
SYMBOL
CONDITIONS
MIN
Receiving amplifier (pins IR, QR and GAR)
Voltage gain from IR to QR
G
VRX
V
IR
= 4mV (RMS)
32
Gain variation with frequency referred to
G
VRX(F)
f = 300~3400 Hz
1kHz
Gain variation with temperature referred
G
VRX(T)
Ta = -25 ~ +75 °C
to 25°C
external resistor connected between
Gain voltage reduction range
G
VRXR
GAR and QR
I
P
=0mA sine wave drive
R
L
= 50Ω, THD =2%
Maximum receiving signal
V
O(rms)
(RMS value)
I
P
= 0mA sine wave drive
R
L
=450
Ω,
THD =2%
Noise output voltage at pin R
G
VRX
=33dB, IR open-circuit,
V
NORX(rms)
(RMS value)
R
L
=150Ω
Automatic gain control (pin AGC)
Gain control range for microphone and
receiving amplifiers with respect to
G
VTRX
I
LINE
= 85mA
I
LINE
=15mA
Highest line current for maximum gain
I
START
Lowest line current for minimum gain
I
STOP
DTMF amplifier (pin DTMF)
V
DTMF
= 20mV (RMS)
Voltage gain from DTMF to LN
G
VDTMF
24.1
MUTE
= LOW
Gain variation with frequency referred to
1kHz
Gain variation with temperature referred
to25°C
Voltage gain from DTMF to QR
(confidence tone)
Mute function (pin MUTE)
LOW level input voltage
HIGH level input voltage
Input current
Gain reduction for microphone and
receiving amplifiers
G
VDTMF(F)
f = 300~3400Hz
G
VDTMF(T)
Ta = -25 ~ +75 °C
G
VCT
V
DTMF
= 20mV (RMS)
R
L
= 150
Ω
V
EE
-0.4
V
EE
+1.5
TYP MAX UNIT
33
±0.2
±0.3
14
0.25
0.35
-87
dBVp
34
dB
dB
dB
dB
V
5.9
23
56
25.3
±0.2
±0.4
-15
V
EE
+0.3
V
CC
+0.4
1.5
80
26.5
dB
mA
mA
dB
dB
dB
dB
V
IL
V
IH
I
MUTE
V
V
μA
dB
G
VTRXM
MUTE
= LOW
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QW-R108-014.B
TEA1110A
APPLICATION INFORMATION CIRCUIT
R
CC
Rprotect
10Ω
R
ast1
130KΩ
C
IR
619
LN
UTC
TEA1110A
LINEAR INTEGRATED CIRCUIT
Typical application of the UTC
TEA1110A
in sets with Pulse Dialling or Flash facilities
C
VCC
100μF
Vcc
+
supply for
peripheral
circuits
IR
QR
GAR
MIC +
BZX79C10
4×
BAS11
VDR
-
95V
+
GAR
R
ast2
100pF
3.92kΩ
C
DTMF
MUTE
AGC V
EE
REG
a/b
Telephone
line
C
GARS
R
ast3
390Ω
Z
bal
1 nF
MIC -
SLPE REG
R
SLPE
20Ω
+
C
signal from
dial and
control circuits
4.7μF
R
pd4
BC558
R
pd5
470kΩ
R
pd6
470kΩ
b/a
BSN254
BC547
R
LIMIT
3.9Ω
R
pd1
470kΩ
BZX79C10
R
pd2
BF473
BC547
68kΩ
PD
input
470kΩ
R
pd3
1MΩ
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www.unisonic.com.tw
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QW-R108-014.B
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