TEA7089AFP datasheet(1/17 Pages) STMICROELECTRONICS

Il numero della parte	TEA7089AFP

Spiegazioni elettronici	LOW-RANGE PHONE DEDICATED CHIP

PDF	17 Pages

Scroll/Zoom	100%

Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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1 / 17 page

TEA7089A

LOW-RANGE PHONE DEDICATED CHIP

June 1998

SO28

(Plastic Package)

ORDER CODE : TEA7089AFP

.

RING

- GENERATION OF 8 MELODY TONES

(Including the 3 German Melody Tones)

- 4 STEPS DIGITAL CONTROL ON THE AM-

PLIFIER OUTPUT LEVEL

.

SPEECH

- TRANSMIT GAIN EXTERNALLY ADJUSTABLE

- RECEIVINGGAINEXTERNALLYADJUSTABLE

- AGCSLOPEEXTERNALLYPROGRAMMABLE

- SOFTCLIPPING ON SENDING CHANNEL

- RECEIVE AMPLIFIER FOR PIEZO OR

ELECTRODYNAMIC TRANSDUCER

- +6dB MODE ON RECEIVE CHANNEL

- LINE POWER MANAGEMENT

.

DIALING

- DTMF GENERATOR

- LOW DC MASK DURING MAKE PERIOD

THROUGH MICROCONTROLLER SERIAL

BUS INTERFACE

.

MICROCONTROLLER INTERFACE

- 1.79MHz CLOCK OR 3.58MHz OSCILLATOR

INPUT

.

MICROCONTROLLER POWER SUPPLY

.

MICROCONTROLLER

CONTROL

INTER-

FACE INCLUDING SERIAL BUS

.

LINE CURRENT EXTRACTOR FOR SUPPLY

OF EXTERNAL PERIPHERALS

DESCRIPTION

The TEA7089A is a Telephone Analog Front End

device, TAFE, which integrates the three basic

functions of a standard telephone set :

- Speech network,

- DTMF generator,

- Ringer generator on buzzer.

A complete telephone set can be designed using

TEA7089A associated with a low cost microcon-

troller.

MIC2

DTMF

V

REF

V

RMC

DCL

DATA

RI

1

2

3

4

5

6

7

8

9

10

28

27

26

25

24

23

22

21

20

19

PON

RES

SOF T

RECIN

SN

GTR

MIC1

AGC

V

CC

IVLS

GND

MSK

OSC

11

12

13

14

18

17

16

15

V

S

V

L

V

MC

GREC

BUZ

EAR+

EAR-

V

RING

PIN CONNECTIONS

1/17

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