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參數(shù)資料
| 型號(hào)： | TEA7092 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | TELEPHONE ANALOG FRONT END |
| 中文描述： | 電話模擬前端 |
| 文件頁(yè)數(shù)： | 48/57頁(yè) |
| 文件大?。?/td> | 574K |
| 代理商： | TEA7092 |
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ZB
Mute
45k
5k
LOUDSPEAKER
CURRENT SOURCE
Mirror 1/40
V
LS
C1
+
1
TEA7092
From
Microphone
1k
9k
10k
0dB
42
25
21
R8
GTR
V
REF
C14
7
DTMF/SINEWAVE
DTMF1
DTMF2
C32
C13
10k
40k
-1
35
36
3
EAR+
EAR-
V
L
I
/85
from
DC path
A
Figure63
DIALINGCODE
0 0 1 0 0 0 1
KEY CODE
0 0 0 X X X X
SPEECHMODE
NUMERIC
KEY PRESSED
No
Yes
SPEECHCODE
0 0 1 0 0 0 0
NUMERIC
KEY PRESSED
No
Yes
DTMF MODE
MUTE
0 0 1 0 0 1 0
INTERDIGITPAUSE
A
Figure 64
V - DIALER FEATURES
V.1 - DTMFDialer
TheDTMF dialer generatesthefrequenciesin order
to driveatelephoneset keyboardandcomplies with
therecommandationQ.23oftheCCITT-T/CS46-02.
It generates:
- The lowfrequencygroup (697, 770, 852,941Hz)
- The high frequency group (1209, 1336, 1477,
1633Hz)
Figure 63 showsthe DTMF amplifier path.
The MUTE signal driven through the serial bus,
selects the microphone signal or the DTMFsignal
and theconfidencetonelevelfor theearphoneand
the loudspeaker.
The
Pin DTMF1 (Pin 7)and byR8 on PinGTR(Pin21),
C32 on Pin DTMF2 (Pin 42) fixes the cut off fre-
quency of the second filter.
- Cut-off frequencyon DTMF1 :
f
1
=
2
π
20
10
3
C13
An internal twist betweeneach DTMF frequency
is programmed so as to take care to follow the
T/CS46-02recommended levels.
- Cut-off frequencyon DTMF2 :
f
2
=
2
π
10
10
3
C32
Figure 64 showsthe DTMF signaling.
DTMF
level is
fixed
by
C13
on
1
with C13 = 47nF,f1 = 170Hz.
1
with C32 = 2.7nF,f2 = 5.9kHz.
TEA7092 - TELEPHONE SET INTEGRATED CIRCUIT
48/57
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TEA7092TQ | TELEPHONE ANALOG FRONT END |
| TEA7092TQT | TELEPHONE ANALOG FRONT END |
| TEA7530DP | MONITOR AMPLIFIER |
| TEA7530FP | MONITOR AMPLIFIER |
| TEA7530 | Monitor Amplifier(監(jiān)聽(tīng)放大器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TEA7092TQ | 制造商:STMicroelectronics 功能描述:SPEECH NETWORK ADVANCED 46DB 44TQFP - Trays |
| TEA7092TQT | 制造商:STMicroelectronics 功能描述:SPEECH NETWORK ADVANCED 46DB 44TQFP - Tape and Reel |
| TEA7530 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MONITOR AMPLIFIER |
| TEA7530DP | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MONITOR AMPLIFIER |
| TEA7530FP | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MONITOR AMPLIFIER |
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