TEA1067/C2 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TEA1067/C2

Low voltage versatile telephone transmission circuit with dialler interface

Philips Electronics 

Philips Semiconductors

Low voltage versatile telephone

transmission circuit with dialler interface

Product specification

TEA1067

GENERAL DESCRIPTION

The TEA1067 is a bipolar integrated circuit performing all

speech and line interface functions required in fully

electronic telephone sets. It performs electronic switching

between dialling and speech. The circuit is able to operate

down to a DC line voltage of 1.6 V (with reduced

performance) to facilitate the use of more telephone sets

in parallel.

Features

• Low DC line voltage; operates down to 1.6 V (excluding

polarity guard)

• Voltage regulator with adjustable static resistance

• Provides supply with limited current for external circuitry

• Symmetrical high-impedance inputs (64 kΩ) for

dynamic, magnetic or piezoelectric microphones

• Asymmetrical high-impedance input (32 kΩ) for electret

microphone

• DTMF signal input with confidence tone

• Mute input for pulse or DTMF dialling

• Power down input for pulse dial or register recall

• Receiving amplifier for magnetic, dynamic or

piezoelectric earpieces

• Large gain setting range on microphone and earpiece

amplifiers

• Line current dependent line loss compensation facility

for microphone and earpiece amplifiers

• Gain control adaptable to exchange supply

• DC line voltage adjustment capability

QUICK REFERENCE DATA

PARAMETER

Line voltage

Line current operating range

Internal supply current

Supply voltage for peripherals

Voltage gain range

microphone amplifier

receiving amplifier

Line loss compensation

gain control range

Exchange supply voltage range

Exchange feeding bridge

resistance range

CONDITIONS

Iline = 15 mA

normal operation

TEA1067

TEA1067T

with reduced performance

power down

input LOW

input HIGH

Iline = 15 mA; Ip = 1.4 mA;

mute input HIGH

Iline = 15 mA; Ip = 0.9 mA;

mute input HIGH

SYMBOL

VLN

Iline

Iline

Iline

ICC

ICC

VCC

VCC

MIN. TYP. MAX. UNIT

3.65 3.9 4.15 V

11

−

11

−

1

−

140 mA

140 mA

11

mA

−

1

1.35 mA

−

55

82

µA

2.2

2.4

−

V

2.5

−

−

V

Gv

44

−

52

dB

Gv

20

−

45

dB

∆Gv

Vexch

5.5

5.9 6.3

dB

36

−

60

V

Rexch

0.4

−

1

kΩ

PACKAGE OUTLINES

TEA1067: 18-lead DIL; plastic (SOT102). SOT102-1; 1998 Jun 18.

TEA1067T: 20-lead mini-pack; plastic (SO20; SOT163A). SOT163-1; 1998 Jun 18.

June 1990

2

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