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TEA7088AFP 데이터시트 PDF




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부품번호 TEA7088AFP 기능
기능 LOW-RANGE PHONE DEDICATED CHIP
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TEA7088AFP 데이터시트, 핀배열, 회로
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
RECIN
SN
AGC
1
2
3
4
28 DTMF
27 VREF
26 VRMC
25 DCL
MIC1
5
24 DATA
MIC2
6
23 MSK
GTR
7
22 OSC
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.
VCC
GND
IVLS
VS
VL
VMC
GREC
8
9
10
11
12
13
14
21 RI
20 PON
19 RES
18 VRING
17 BUZ
16 EAR+
15 EAR-
January 1998
1/17




TEA7088AFP pdf, 반도체, 판매, 대치품
TEA7088A
ELECTRICAL CHARACTERISTICS
The block diagram is given in Figure 1.
The values of the different networks used in this datasheet are defined as followed :
- The return loss is adjusted by R10 of 600.
- The transmit adjust gain network R8 is calculated in order to have a gain of 46dB typical with ILS = 22mA.
- The sidetone network ZST is set to be lower than 20dB (Vear/Vmic) on a 600load on line.
- The DC characteristics are set by a resistor of 82kbetween VL and VS.
Absolute Maximum Ratings
Symbol
ILINE
IRING
Toper
Tstg
Tj
Authorized Voltage on
Pin 2 - RECIN
Pin 3 - SN
Pin 8 - VCC
Pin 10 - IVLS
Pin 12 - VL
Pin 13 - VMC
Pin 17 - BUZ
Pin 18 - VRING
Pin 19 - RES
Pin 20 - PON
Pin 21 - RI
Pin 22 - OSC
Pin 23 - MSK
Pin 24 - DATA
Pin 25 - DCL
Pin 26 - VRMC
Line Current
Ring Current
Operating Temperature
Storage Temperature
Junction Temperature
Parameter
Value
13
12
11
6
12
6
VRING +0.3, GND -0.3
27
VRMC +0.3, GND -0.3
VRMC +0.3, GND -0.3
VRMC +0.3, GND -0.3
VRMC +0.3, GND -0.3
VRMC +0.3, GND -0.3
VRMC +0.3, GND -0.3
VRMC +0.3, GND -0.3
5
120
50
-25, +70
-55, +150
-25, +150
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
mA
mA
°C
°C
°C
DC Characteristics (Tamb = 25°C ; Logic in Default Mode unless otherwise noted)
Symbol
VL
IVRMC
Parameter
Line Voltage
- In Speech and DTMF Mode
- In Mask Mode
Stabilized Supply Voltage
- Output Current
Test Conditions
Test 1
IL = 22mA
IL = 90mA
IL = 22mA
Test 1, IL = 22mA
Min.
4
6.7
Typ.
4.6
7.5
1.5
VRMC
IVMC
IL S
- Output Voltage
Unstabilized Supply Voltage
- Start up Current
- Output Current
Line Current Source Supply
IRMC = 1.5mA
Test 1, IL = 22mA
VMC = 2.5V, IVRMC = 1.5mA
VMC = 3.6V, IVRMC = 0mA
Test 1, VLS = 0V ; VMC = 3.6V
IL = 22mA
IL = 90mA
3.15
10
10
67
3.35
15
3
14
75
The line current source supply depends of IL :
- For IL < 20mA : ILS (mA) = 0.765 x IL (mA) - 1.4mA
- For IL > 20mA : ILS (mA) = 0.92 x IL (mA) - 4.5mA
On this pin the maximum output level is : V10 = V12 - (1.2 + 10 x ILS) and V10 < 6V
Max.
5.2
8.3
3
3.55
18
82
Unit
V
V
V
mA
V
mA
mA
mA
mA
4/17

4페이지










TEA7088AFP 전자부품, 판매, 대치품
TEA7088A
ELECTRICAL SPECIFICATIONS (continued)
DTMF Generator (Tamb = 25°C ; RL = 660)
Symbol
Parameter
Test Conditions
Amf Tone Frequency Accuracy
Test 6 Pin Osc
fclock = 1.79MHz oscillator off
or
Resonator : 3.58MHz oscillator on
C13 =100nF, IL = 22mA
Llf Low Freq. Group Line Level
Lhf High Freq. Group Line Level
Pmf Preemphasis HF/LF
tDON
tDOFF
Cmf
Rise Time
Decay Time
DTMF Confidence Tone :
Earphone level (low freq.)
Earphone level (high freq.)
– - Unwanted Harmonics Level (see Figure 6)
Min.
- 0.4
-10
-8
+1
13
17
Figure 6 : Unwanted Harmonics Level in DTMF
-30
Typ.
-8.5
-6.5
+2
17
22
Max.
0.4
-7
-5
+3
5
5
21
27
Unit
%
dBm
dBm
dB
ms
ms
mV
mV
-50
-70
-90
100
1k
10k 100k
(Hz)
Figure 7 : Microcontroller Interface
1M
VL
IS pe ech
VMC
13
Ba tte ry
C10
47 F
VREF I
5 .6 V
IS tart-u p
VRING
18
I (In Ring)
kIL
VRMC (3 .4V)
26
C15 P
10 F + LCD
7/17

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TEA7088AFP

LOW-RANGE PHONE DEDICATED CHIP

ST Microelectronics
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