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CPC5710NTR Datasheet(PDF) 6 Page - Clare, Inc.

Part # CPC5710NTR
Description  Phone Line Monitor (PLM) IC
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Manufacturer  CLARE [Clare, Inc.]
Direct Link  http://www.clare.com
Logo CLARE - Clare, Inc.

CPC5710NTR Datasheet(HTML) 6 Page - Clare, Inc.

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CPC5710N
6
www.clare.com
Rev. 1.0 12/16/2002
2.2 Non-Intrusive Line Monitoring, Display Feature (Caller ID) Signal
Reception, and Ring Detection Application
This application uses the logic input LIN/CMP to select
between detecting ringing or passing through display
feature (caller-ID) and voice signals. Note the AC
coupling of the tip and ring signals.
With this circuit, set LIN/CMP high to detect ringing.
After a valid ring, set LIN/CMP low to couple the audio
channel signal to the output pins.
Please see “Comparator Considerations” on page 7 for
more information on ringing detection.
Figure 4. Non-Intrusive Line Monitoring, Display Feature (Caller ID) Signal Reception, and Ring Detection
Application Circuit
2.2.1 Frequency Response
The blocking capacitors used in this application circuit
affect the frequency response of the system. With the
components shown, response rolls off 3 dB @ 166 Hz.
Other values can be used for different response
characteristics.
2.3 Regulatory Issues
Component sizing and value recommendations shown
in the application circuits above will need to be
reviewed with regard to the regulatory requirements of
any particular application.
IN+
IN-
LIN/CMP
VDD
VDD
VDD
VSS
VSS
VSS
CMPOUT
RING DETECT
(to ring parser)
LINOUT+
Display Feature Output
V
= V at 500 Hz
OUT
IN
3.3 or 5 V
LINOUT-
A
+
+
-
-
-
+
1.625 V
1.25 V
A=6
V
U1 CPC5710
R1-4
1.8 M
(R
)
SNP
C1,2
220 pF
(C
)
SNP
R5
(R
)
1.5 M, 1%
0603
SNPD
TIP
RING
From
Control
Logic
2V
0V
Unless noted otherwise:
1/8 W,
All resistors are
1%, 1206.
All capacitors are 2 kV, 10%.


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