TEA1110AG-D14-T datasheet(7/9 Pages) UTC

Nome de Peças	TEA1110AG-D14-T

Descrição Electrónicos	LOW VOLTAGE VERSATILE TELEPHONE TRANSMISSION CIRCUIT

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Fabricante Electrônico	UTC [Unisonic Technologies]

Página de início	http://www.utc-ic.com

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7 / 9 page

TEA1110A

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

7 of 9

www.unisonic.com.tw

QW-R108-014.D



FUNCTIONAL DESCRIPTION(Cont.)

6.0

3.0

5.0

4.0

104

105

106

107

(1) Influence of RVA on VREF

(2) VREF without influence of RVA

Fig.2 Reference voltage adjustment by RVA

(1)

(2)

RVA (Ω)

The internal circuitry of the UTC TEA1110A is supplied from pin VCC which can be used to supply peripheral

circuits such as dialling or control circuits. This voltage supply is derived from the line voltage by means of a resistor

(RCC) and it must be decoupled by a capacitor CVCC. The VCC voltage depends on the current consumed by the IC

and the peripheral circuits as shown by the formula :( RCCint is the internal equivalent resistance of the voltage

supply, and Irec is the current consumed by the output stage of the earpiece amplifier))

VCC= VCC0 - RCCint × (IP-IREC)

V CC0= VLN-RCC × ICC (see also Figs 3 and 4).

The DC line current flowing into the set is determined by the exchange supply voltage (Vexch), the feeding

bridge resistance (Rexch), the DC resistance of the telephone line (Rline) and the reference voltage (VREF). The

internal reference voltage (generating VREF) would be automatically adjusted to a lower value when the line currents

drop below 7.5mA. Therefore, more sets can work in parallel with DC line voltages (excluding the polarity guard)

down to 1.6V (absolute minimum voltage). At currents below 7.5mA, the circuit has limited sending and receiving

levels. This is called the low voltage area.

2.5

2

0.5

0

01

2

3

4

1.5

1

(1)

(2)

Vcc (V)

(1) With RVA resistor.

(2) Without RVA resistorl

Vcc

VEE

Rccint

Vcco

Irec

PERIPHERAL

CIRCUIT

Ip

+

Fig.3 Typical current IP available from VCC for peripheral

circuits at ILINE=15mA.

Fig.4

VCC supply voltage for peripherals

Nº de peça semelhante - TEA1110AG-D14-T

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
Unisonic Technologies	TEA1110AG-D14-T	224Kb / 9P	LOW VOLTAGE VERSATILE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE

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Descrição semelhante - TEA1110AG-D14-T

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
Unisonic Technologies	TEA1110A	249Kb / 9P	LOW VOLTAGE VERSATILE TELEPHONE TRANSMISSION TELEPHONE TRANSMISSION INTERFACE
Unisonic Technologies	TEA1110A	224Kb / 9P	LOW VOLTAGE VERSATILE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE
NXP Semiconductors	TEA1110A	187Kb / 20P	Low voltage versatile telephone transmission circuit with dialler interface 1997 Apr 22
	TEA1113	181Kb / 20P	Low voltage versatile telephone transmission circuit with dialler interface 1997 Mar 27
	TEA1067	175Kb / 28P	Low voltage versatile telephone transmission circuit with dialler interface June 1990
List of Unclassifed Man...	ILA1068	352Kb / 11P	Versatile Telephone Transmission Circuit with Dialler Interface
NXP Semiconductors	TEA1068	168Kb / 24P	Versatile telephone transmission circuit with dialler interface 1996 Apr 23
NXP Semiconductors	TEA1066T	133Kb / 24P	Versatile telephone transmission circuit with dialler interface 1996 Apr 04
Unisonic Technologies	TEA1062AN	334Kb / 14P	LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT
NXP Semiconductors	TEA1065	154Kb / 28P	Versatile telephone transmission circuit with dialler interface March 1994

More results

TEA1110AG-D14-T Folha de dados(PDF) 7 Page - Unisonic Technologies

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Nº de peça semelhante - TEA1110AG-D14-T

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