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ST75C540 Datasheet(PDF) 83 Page - STMicroelectronics

Part # ST75C540
Description  SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHONY,MODEM, FAXOVERINTERNET& POTSLINES
PDF  84 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST75C540 Datasheet(HTML) 83 Page - STMicroelectronics

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XIX - APPENDIX A : MODES OF OPERATION (continued)
15
ADC
MUTE
DAC
Line
HYBRID
TxA1
TxA2
RxA
ADC
14
11
10 MIC3
8
MIC1
9
MIC2
79
SPK2
78
MUTE
77
SPK3
76
MUTE
2
SPK1
1
MUTE
[0..-30]dB
Step 3dB
DAC
DG
Programmable
Attenuation
Addition
of Signals
Automatic
Gain
ATT_MIC
DC-
BLOCKA
DC-
BLOCK
ATT_SPK
ATT_LOC
DG
6 PRIMARY
TONE
DETECTORS
DTMF
DETECTOR
4 SECONDARY
TONE
DETECTORS
4 TONE
GENERATORS
ATT_MODRX
ATT_MODTX
ATT_TX
ATT_AUDTX
ATT_AUDRX
ATT_SEL
(*)
(*)
(*)
H(z) =
z- 1
z - 0.875
Figure 57 : TransparentMode
ST75C530 - ST75C540
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