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參數(shù)資料
| 型號： | TEA7088AFP |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | LOW-RANGE PHONE DEDICATED CHIP |
| 中文描述： | 低檔手機專用芯片 |
| 文件頁數(shù)： | 2/17頁 |
| 文件大?。?/td> | 184K |
| 代理商： | TEA7088AFP |
PIN DESCRIPTION
Name
SOFT
RECIN
SN
AGC
MIC1
MIC2
GTR
V
CC
GND
IVLS
V
S
V
L
V
MC
GREC
EAR-
EAR+
BUZ
VRING
RES
PON
RI
OSC
MSK
DATA
DCL
V
RMC
V
REF
DTMF
Pin N
°
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Description
Transmit Softclipping Time Constant
Receiving Input
Sidetone Network Input
Line Current Regulation Stop Value
Microphone Input
Microphone Input
Transmit Gain Adjustment
Transmit and Receive Part Power Supply
Ground
Line Current Source Power Supply
Voltage Stabilizer
Positive Line
Unregulated Microcontroller Power Supply
Receive Gain Adjustment
Negative Earphone Output
Positive Earphone Output
Ringer Buzzer Output
Ring Power Supply
Reset
Power On
Ring Indicator
Oscillator Input
Mask, Ring Melody Input
Data Input
Data Clock Input
Microcontroller Stabilized Power Supply
Reference Voltage (V
CC
/2)
DTMF Filter
7
SPEECH
The speech network includes :
- a lownoisetransmitchannelsuitableforany kind
of microphone transducer.Softclippingon trans-
mit line signal is provided by the chip.
- a low noise receive channel with symmetrical
outputs to be compatiblewith both piezoceramic
and electrodynamicearpiece. An additional 6dB
gain can be inserted in the receive channel
throughsoftware control.
- alinelengthgaincontrol(AGC)withstartingpoint
of gainregulationfixedat25mAlinecurrent;slope
of gainregulationis externallyadjustablewithone
resistor.AGCcanberemovedbyhardware(maxi-
mumgain flat) or by software(-2dBflat).
The phone impedanceand sidetonecan be tuned
throughexternal networks.
DTMF GENERATOR
The onboard DTMF generator fullfils the CEPT
requirementswith an externalsinglepole filter.
RINGER
Up to 8 different tones can be generated by the
TEA7088Aringer.The digital volumecontrolof the
ringer can be performed through a specific com-
mand (4 steps).Aringindicationsignal is provided
to the microcontroller by the TEA7088A.If more
tones are requested the input RM/MSK allows to
inject tones generated by the microcontroller.
FURTHERADVANTAGES
The microcontroller power supply is providedby the
TEA7088A.Thepowersupplyisspecificallydesigned
tocopewithalongflashoralonggroundkeyduration.
The TEA7088A is able to supply the necessary
current to an external speakerphone circuit
TEA7540 and loudspeaker amplifier TEA7532
without any additional circuitry.
Line current and reset indications are provided to
the microcontrollerby theTEA7088A.
The microcontroller drives the TEA7088Athrough
a 2 wires serial interface.
TEA7088A
2/17
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TEA7089A | Low-Range Phone Dedicated Chip(電話模擬前端) |
| TEA7089 | LOW-RANGE PHONE DEDICATED CHIP |
| TEA7089AFP | LOW-RANGE PHONE DEDICATED CHIP |
| TEA7091 | Telephone Analog Front End(電話模擬前端) |
| TEA7092 | TELEPHONE ANALOG FRONT END |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TEA7089 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW-RANGE PHONE DEDICATED CHIP |
| TEA7089A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW-RANGE PHONE DEDICATED CHIP |
| TEA7089AFP | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW-RANGE PHONE DEDICATED CHIP |
| TEA7091 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TELEPHONE ANALOG FRONT END |
| TEA7092 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TELEPHONE SET INTEGRATED CIRCUIT |
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