TEA7089A View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TEA7089A

LOW-RANGE PHONE DEDICATED CHIP

STMicroelectronics 

TEA7089A

LOW-RANGE PHONE DEDICATED CHIP

. RING

- GENERATION OF 8 MELODY TONES

(Including the 3 German Melody Tones)

. - 4 STEPS DIGITAL CONTROL ON THE AM-

PLIFIER OUTPUT LEVEL

SPEECH

- TRANSMIT GAINEXTERNALLY 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

SO28

(Plastic Package)

ORDER CODE : TEA7089AFP

PIN CONNECTIONS

S OFT

1

RECIN

2

SN

3

AGC

4

28

DTMF

27

VREF

26

VRMC

25

DC L

MIC1

5

24

DATA

MIC2

6

23

MSK

GTR

7

22

OSC

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.

VCC

8

GND

9

IVLS

10

VS

11

VL

12

VMC

13

GREC

14

21

RI

20

P ON

19

RES

18

VRING

17

BUZ

16

EAR+

15

EAR-

June 1998

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