CPC5710N
Phone Line Monitor (PLM) IC
Features
•
Excellent common-mode rejection ratio (CMRR),
>40 dB
•
Supplied application circuits can meet isolation
requirements of worldwide telephony standards
•
Small 8-pin SOIC
•
Worldwide telephone network compatibility
•
Full-wave ringing level detector comparator with
internal threshold, large hysteresis, and logic-level
output
•
3.3 or 5.0 Volt operation
•
High differential input impedance, very low common-
mode input impedance
•
Fixed gain
•
Differential or single-ended linear output
•
TTL logic input
•
CMOS logic output (TTL compatible)
•
Virtually non-detectable in voice monitoring
applications
Description
The Clare CPC5710N is a CMOS special purpose
fixed-gain amplifier with comparator for telephone line
monitoring. The high (>40 dB) common-mode
rejection ratio makes the CPC5710N an excellent
choice for signal monitoring, discrete voice recording,
and line condition monitoring applications. The
CPC5710N is ideal for modem applications including
embedded modem designs like set-top boxes, and
voice recording applications.
Ordering Information
Part Number
CPC5710N
CPC5710NTR
Description
Phone line monitor IC, tubed
Phone line monitor IC, tape and reel
Applications
•
In signal monitoring applications, CPC5710N can be
used for:
• Display feature (caller ID) signal processing
• Line-in-use detection (another-phone-off-hook)
• Ringing signal level detection
• Battery presence monitoring
• Tip and ring lead voltage monitoring
•
Line condition detection, including line polarity, tip
and ring lead voltage, and battery presence
Figure 1. CPC5710N Block Diagram
3
LIN/CMP
1.625 V
V
DD
-
+
6
7
IN-
IN+
0V
A
V
=6
2V
LINOUT-
4
LINOUT+
5
+
-
CMPOUT
2
V
DD
V
DD
1
V
SS
+
1.25 V
-
V
SS
V
SS
8
DS-CPC5710-R1.0
12/16/2002
www.clare.com
1
CLARE [ CLARE, INC. ]
