TEA7088AFP View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TEA7088AFP

LOW-RANGE PHONE DEDICATED CHIP

STMicroelectronics 

TEA7088A

ELECTRICAL CHARACTERISTICS

The block diagram is given in Figure 1.

The values of the different networks used in this datasheet are defined as followed :

- The return loss is adjusted by R10 of 600Ω.

- The transmit adjust gain network R8 is calculated in order to have a gain of 46dB typical with ILS = 22mA.

- The sidetone network ZST is set to be lower than 20dB (Vear/Vmic) on a 600Ω load on line.

- The DC characteristics are set by a resistor of 82kΩ between VL and VS.

Absolute Maximum Ratings

Symbol

ILINE

IRING

Toper

Tstg

Tj

Authorized Voltage on

Pin 2 - RECIN

Pin 3 - SN

Pin 8 - VCC

Pin 10 - IVLS

Pin 12 - VL

Pin 13 - VMC

Pin 17 - BUZ

Pin 18 - VRING

Pin 19 - RES

Pin 20 - PON

Pin 21 - RI

Pin 22 - OSC

Pin 23 - MSK

Pin 24 - DATA

Pin 25 - DCL

Pin 26 - VRMC

Line Current

Ring Current

Operating Temperature

Storage Temperature

Junction Temperature

Parameter

Value

13

12

11

6

12

6

VRING +0.3, GND -0.3

27

VRMC +0.3, GND -0.3

VRMC +0.3, GND -0.3

VRMC +0.3, GND -0.3

VRMC +0.3, GND -0.3

VRMC +0.3, GND -0.3

VRMC +0.3, GND -0.3

VRMC +0.3, GND -0.3

5

120

50

-25, +70

-55, +150

-25, +150

Unit

V

V

V

V

V

V

V

V

V

V

V

V

V

V

V

V

mA

mA

°C

°C

°C

DC Characteristics (Tamb = 25°C ; Logic in Default Mode unless otherwise noted)

Symbol

VL

IVRMC

Parameter

Line Voltage

- In Speech and DTMF Mode

- In Mask Mode

Stabilized Supply Voltage

- Output Current

Test Conditions

Test 1

IL = 22mA

IL = 90mA

IL = 22mA

Test 1, IL = 22mA

Min.

4

6.7

1.5

Typ.

4.6

7.5

Max.

5.2

8.3

3

Unit

V

V

V

mA

VRMC

IVMC

IL S

- Output Voltage

Unstabilized Supply Voltage

- Start up Current

- Output Current

Line Current Source Supply

IRMC = 1.5mA

3.15 3.35 3.55

V

Test 1, IL = 22mA

VMC = 2.5V, IVRMC = 1.5mA

10

15

mA

VMC = 3.6V, IVRMC = 0mA

3

mA

Test 1, VLS = 0V ; VMC = 3.6V

IL = 22mA

IL = 90mA

10

14

18

mA

67

75

82

mA

The line current source supply depends of IL :

- For IL < 20mA : ILS (mA) = 0.765 x IL (mA) - 1.4mA

- For IL > 20mA : ILS (mA) = 0.92 x IL (mA) - 4.5mA

On this pin the maximum output level is : V10 = V12 - (1.2 + 10 x ILS) and V10 < 6V

4/17

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