Philips Semiconductors
Product specification
Low voltage versatile telephone transmission circuit
with dialler interface and transmit level dynamic limiting
FEATURES
•
Low DC line voltage; operates down to 1.8 V (excluding
polarity guard)
•
Voltage regulator with low voltage drop and adjustable
static resistance
•
DC line voltage adjustment facility
•
Provides a supply for external circuits
•
Dynamic limiting (speech-controlled) in transmit
direction prevents distortion of line signal and sidetone
•
Symmetrical high-impedance inputs (64 kΩ) for
dynamic, magnetic or piezo-electric microphones
•
Asymmetrical high-impedance input (32 kΩ) for electret
microphones
•
DTMF signal input
•
Confidence tone in the earpiece during DTMF dialling
•
Mute input for disabling speech during pulse or DTMF
dialling
•
Power-down input for improved performance during
pulse dial or register recall (flash)
•
Receiving amplifier for dynamic, magnetic or
piezo-electric earpieces
ORDERING INFORMATION
EXTENDED TYPE
NUMBER
TEA1064B
TEA1064BT
Notes
1. SOT146-1; 1998 Jun 18.
2. SOT163-1; 1998 Jun 18.
PACKAGE
PINS
20
20
PIN POSITION
DIL
mini-pack
MATERIAL
plastic
plastic
TEA1064B
•
Large amplification setting ranges on microphone and
earpiece amplifiers
•
Line loss compensation (line current dependent) for
microphone and earpiece amplifiers (not used for DTMF
amplifier)
•
Gain control curve adaptable to exchange supply
•
Automatic disabling of the DTMF amplifier in
extremely-low voltage conditions
•
Microphone MUTE function available with switch
•
MUTE, POWER-DOWN and DTMF input reference (pin
V
EE2
) can be connected either to V
EE1
or SLPE.
GENERAL DESCRIPTION
The TEA1064B is a bipolar integrated circuit that performs
all the speech and line interface functions required in fully
electronic telephone sets. It performs electronic switching
between dialling and speech. The IC operates at line
voltages down to 1.8 V DC (with reduced performance) to
facilitate the use of more telephone sets connected in
parallel. The transmit signal on the line is dynamically
limited (speech-controlled) to prevent distortion at high
transmit levels of both the sending signal and the sidetone.
CODE
SOT146
(1)
SO20; SOT163A
(2)
March 1994
2
Philips Semiconductors
Product specification
Low voltage versatile telephone transmission circuit
with dialler interface and transmit level dynamic limiting
QUICK REFERENCE DATA
SYMBOL
I
line
PARAMETER
line current operating range
normal operation
with reduced performance
I
CC
internal supply current
power-down input LOW
power-down input HIGH
G
v
voltage gain range
microphone amplifier
receiving amplifier
line loss compensation ranges
G
v
V
exch
R
exch
V
LN(p-p)
gain control
exchange supply voltage
exchange feeding bridge resistance
maximum output voltage swing on LN
(peak-to-peak value)
R16 = 392
Ω;
I
line
= 15 mA
I
p
= 1.4 mA
I
p
= 2.7 mA
V
p
supply for peripherals
I
line
= 15 mA
I
p
= 1.4 mA
I
p
= 2.7 mA;
R
REG-SLPE
= 20 kΩ
V
LN
DC line voltage
I
line
= 15 mA
without R
REG-SLPE
R
REG-SLPE
= 20 kΩ
T
amb
Note
operating ambient temperature range
3.25
4.05
−25
3.5
4.4
−
2.5
2.9
2.7
3.1
3.55
3.25
3.80
3.50
5.7
36
400
6.1
−
−
44
20
−
−
V
CC
= 2.8 V
−
−
1.3
60
note 1
11
2
−
−
CONDITIONS
MIN.
TYP.
TEA1064B
MAX.
140
11
1.6
82
52
45
6.5
60
1000
UNIT
mA
mA
mA
µA
dB
dB
dB
V
Ω
4.05
3.75
−
−
V
V
V
V
3.75
4.75
+75
V
V
°C
1. For the TEA1064BT the maximum line current depends on the heat dissipating qualities of the mounted device.
March 1994
3
Philips Semiconductors
Product specification
Low voltage versatile telephone transmission circuit
with dialler interface and transmit level dynamic limiting
PINNING
SYMBOL
LN
GAS1
GAS2
QR−
QR+
GAR
DLS/MMUTE
MIC−
MIC+
STAB
V
EE1
DTMF
IR
MUTE
PD
V
CC
REG
AGC
V
EE2
SLPE
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
positive line terminal
gain adjustment; transmitting amplifier
gain adjustment; transmitting amplifier
inverting output; receiving amplifier
non-inverting output; receiving amplifier
gain adjustment; receiving amplifier
DESCRIPTION
TEA1064B
decoupling for transmit amplifier dynamic and microphone MUTE input
inverting microphone input
non-inverting microphone input
current stabilizer
negative line terminal
dual-tone multi-frequency input
receiving amplifier input
mute input
power-down input
internal supply decoupling
voltage regulator decoupling
automatic gain control input
reference for POWER-DOWN (PD), MUTE and DTMF
slope adjustment for DC curve/reference for peripheral circuits
handbook, halfpage
LN
GAS1
GAS2
QR−
QR+
GAR
DLS/MMUTE
MIC−
MIC+
1
2
3
4
5
20 SLPE
19 VEE2
18 AGC
17 REG
16 VCC
TEA1064B
6
7
8
9
15 PD
14 MUTE
13 IR
12 DTMF
11 VEE1
MBA433
STAB 10
Fig.2 Pin configuration.
March 1994
5
Motor Drive Control（Motor Control）
京公网安备 11010802033920号
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