CPC5712 Datasheet, PDF (1/11 Pages) Clare, Inc. – Phone Line Monitor with Detectors (PLMD)

CPC5712
Phone Line Monitor with Detectors (PLMD)
Features
• CPC5712 Outputs:
• Two Independent Programmable Level Detectors
with Programmable Hysteresis
• Fixed-Level Polarity Detector with Hysteresis
• Differential Linear Output
• Minimum External Components
• Excellent Common-Mode Rejection Ratio
(CMRR) > 55dB
• Application circuits meet isolation requirements of
worldwide telephony standards
• Worldwide telephone network compatibility
• Single Supply Operation, 3.0V to 5.5V
• High differential input impedance
• Very low common-mode input impedance
• Fixed Gain
• TTL Compatible CMOS Logic Level outputs
• Small SOP 16-Lead package
Applications
• VoIP Gateways, IP-PBX, xDSL
• TIP/RING Monitoring
• Line-In-Use Detection
• Polarity Detection for Caller ID, Enhanced 911
• Battery Detection, PSTN Check
• Non-telephony voltage level detection applications
• Instrumentation
• Industrial Controls
Description
The CPC5712 is a special purpose Phone Line
Monitor with Detectors (PLMD) integrated circuit that
is used in various high-voltage telephony applications
such as VoIP gateways and IP-PBXs. The device
monitors the TIP/RING potential through a
high-impedance divider (resistor isolation) to derive
two programmable signal level detects, polarity
information, and a scaled representation of the phone
line voltages. In use, the resistor divider and the high
input impedance of the CPC5712 make the circuit
practically undetectable on the line.
The two voltage-level detects are programmed with
external resistors, which gives the designer complete
freedom with respect to line voltage detection levels.
The level settings also have programmable hysteresis
to prevent false triggering conditions. Detection of
these levels allows the user to determine the condition
of the line.
This device can also be used in non-telephony
applications such as instrumentation and industrial
controls, especially when a low-level differential level
needs to be detected in the presence of a large
common-mode voltage.
Ordering Information
Part
CPC5712UTR
Description
PLMD, 16-Lead SOP (2000/Reel)
Figure 1 CPC5712 PLMD With Support Components
V+
1
V_CC
CPC5712
TIP
RING
R_IN1
R_DIFF
R_IN2
7 IN+ ₊
G=5
- ^{8 IN-}
GND
V_REF
16 15 14 9
OUT+ 5
OUT - 6
OUT+
POLARITY 4
DET1 ³
V_L1
V_H1 V_L2 V_H2
DET2 2
10 11 12 13
R1 R2 R3 R4 R5
+ Analog Output
- Analog Output
Polarity Output
Voltage Level Detect 1
Voltage Level Detect 2
Pb
RoHS
2002/95/EC
e3
DS-CPC5712 - R01
www.clare.com
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