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TEA7088A

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 :

TEA7088AFP

PIN CONNECTIONS

S OFT

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

DTMF

RECIN

SN

AGC

MIC1

MIC2

V

REF

V

RMC

DCL

DATA

MSK

OSC

RI

P ON

GTR

DESCRIPTION

The TEA7088A 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

TEA7088A associated with a low cost microcon-

troller.

January 1998

V

CC

GND

IVLS

V

S

RES

V

RING

BUZ

7088A-01.EPS

V

L

V

MC

GREC

EAR+

EAR-

1/17

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