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TEA1064A

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 in two options: unregulated supply, regulated line voltage; sta...

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SeekIC No. : 004517226 Detail

TEA1064A: 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· Pro...

TEA1064A Data Sheet

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Part Number:
TEA1064A
Supply Ability:
5000

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Product Details

Description



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 in two options: unregulated supply, regulated line voltage; stabilized supply, line voltage varies with supply current
· Dynamic limiting (speech-controlled) in transmit direction prevents distortion of line signal and sidetone
· Symmetrical high-impedance inputs (64 kW) for dynamic, magnetic or piezo-electric microphones
· Asymmetrical high-impedance input (32 kW) 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 magnetic, dynamic or piezo-electric earpieces
· 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


Pinout

Connection Diagram


Specifications

PARAMETER
CONDITIONS
SYMBOL
MIN.
MAX.
UNIT
Positive line voltage continuous
Repetitive line voltage during
switch-on line interruption
Repetitive peak line voltage
one 1 ms pulse per 5 s


Line current TEA1064A (note 1)
Line current TEA1064AT (note 1)
Input voltage on pins other than
LN and VCC2
Total power dissipation (note 2)
TEA1064A
TEA1064AT
Storage temperature range
Operating ambient temperature range
Junction temperature
R9 = 20 W;
R10 = 13 W
(Fig.24)
R9 = 20 W
R9 = 20 W





R9 = 20 W
VLN


VLN



VLN
ILN
ILN



Vi


Ptot
Ptot
Tstg
Tamb
Tj
-


-


-
-
-


VEE-0.7



-
-
-40
-25
-
12


13.2


28
140
140


VCC1 + 0.7




714
555
+ 125
+ 75
+125
V


V



V
mA
mA



V

mW
mW
°C
°C
°C
Notes
1. Mostly dependent on the maximum required Tamb and on the voltage between LN and SLPE. See Figs 20 and 21 to determine the current as a function of the required voltage and the temperature.
2. Calculated for the maximum ambient temperature specified Tamb = 75 °C and a maximum junction temperature of 125 °C.


Description

The TEA1064A 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 and has a powerful DC supply for peripheral circuits. 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.




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