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TEA7089AFP Datasheet(PDF) 1 Page - STMicroelectronics

No. de pieza TEA7089AFP
Descripción Electrónicos  LOW-RANGE PHONE DEDICATED CHIP
PDF  17 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TEA7089AFP Datasheet(HTML) 1 Page - STMicroelectronics

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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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