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.

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 commonmode 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

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