TEA1064A/C1 Philips Semiconductors (Acquired by NXP), TEA1064A/C1 Datasheet - Page 2

• Manufacturer Part Number: TEA1064A/C1
• Description: TEA1064A; Low Voltage Versatile Telephone Transmission Circuit With Dialler Interface And Transmit Level Dynamic Limiting
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
GENERAL 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.
FEATURES
March 1994
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:
Dynamic limiting (speech-controlled) in transmit
direction prevents distortion of line signal and sidetone
Symmetrical high-impedance inputs (64 k ) for
dynamic, magnetic or piezo-electric microphones
Asymmetrical high-impedance input (32 k ) 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
Low voltage versatile telephone transmission circuit
with dialler interface and transmit level dynamic limiting
unregulated supply, regulated line voltage;
stabilized supply, line voltage varies with supply
current
2
PACKAGE OUTLINES
Notes
1. SOT146-1; 1998 Jun 18.
2. SOT163-1; 1998 Jun 18.
TEA1064A :20-lead DIL; plastic (SOT146).
TEA1064AT:20-lead mini-pack; plastic (SO20;
SOT163A).
(2)
Product specification
TEA1064A
(1)